技术警报 -
Barracuda Networks
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什么是技术警报？
技术警报能为客户提供有关技术及安全问题的影响与何时及如何解决问题的完全透明的信息公告。
Issue caused by NG Firewall Pattern Update
受影响产品
Barracuda NextGen Firewal F-Series
On Jan 27th, 3 pm UTC new application definitions were released for the Barracuda NextGen Firewall F-Series.
The included Content-Pattern file contained corrupted data resulting unresponsiveness of the firewall and high CPU load on lower capacity units. The Barracuda Network Security Team replaced the corrupted definitions at 5:45 pm UTC.Affected Firmware: Barracuda NextGen Firewall F-Series Firmware Version 6.2.x and 7.0.xImpact: Affected boxes continued to enforce defined rulesets and did not switch to "fail open " or "fail close" mode. However, firewall ruleset changes made while a unit was affected did not take effect even though a ruleset change was performed through the
configuration interface. This error condition is only resolved through a restart of the firewall service, or by applying the provided hotfix.Mitigation: Customers who notice the described symptoms should IMMEDIATELY install the following
Note that this hotfix works for 6.2.x and 7.0.x.We apologize for any inconvenience caused by this issue. We are constantly evaluating our quality assurance processes and will take appropriate measures to immunize our systems against similar incidents in the future .
Barracuda Web Application Firewall and Load Balancer ADC post auth remote code excecution
受影响产品
Barracuda Web Application Firewall, Barracuda Load Balancer ADC
On Tuesday, August 2, 2016 security definition 2.1.22249 was released to address the release of a metasploit module targeting a post authentication remote code execution vulnerabily in the following products:
Barracuda Web Application Firewall v7.9 and later
Barracuda Load Balancer ADC v5.2 and later
No other products are affected by this issue or security update.
For maximum protection, Barracuda Networks recommends that all customers ensure that their attack and security definitions are set to On and to upgrade to the latest generally available release of the firmware and security definitions.
Barracuda Web Filter, SSL Inspection, CVE- and CVE-
受影响产品
Barracuda Web Filter
In conjunction with recent external research by CERT into SSL Inspection implementations in the market, Barracuda Network conducted an audit of the Barracuda Web Filter. On Thursday, April 16th, we released Barracuda Web Filter version 8.1.0.005 to address two issues identified in our audit.
CVE-: prior to version 8.1.0.005, the Barracuda Web Firewall fails to check the validity of upstream certificates when SSL inspection is enabled. Upgrading to version 8.1.0.005 resolves this issue and no other action is required.
CVE-: versions 7.0 through 8.1.003 ship with a set of default root CA certificates that are common across appliances. Upgrading to version 8.1.0.005 ensures that each unit has a unique default root CA certificate. Customers who have configured SSL Inspection with the default certificate should deploy new certificates following the instructions at .
For maximum protection, Barracuda Networks recommends that all customers ensure that their security definitions are set to On and to upgrade to the latest generally available release of the firmware and security definitions.
Resolved issue that could lead to Denial of Service on Barracuda Firewall
受影响产品
Barracuda Firewall Release 6.6.x
On February 26th, 2015, Barracuda Networks released security definition 2.1.16026 which resolves an issue where an attacker could perform a Denial of Service against Barracuda Firewall Release 6.6.x.
Customers are advised to update their Security Definitions to v2.1.16026 immediately.
For maximum protection, Barracuda Networks recommends that all customers ensure that their security definitions are set to On and to upgrade to the latest generally available release of the firmware and security definitions.
Barracuda Networks and CVE- - GHOST
受影响产品
Multiple Products and Services
On the morning of January 27th, 2015 we were notified of a vulnerability affecting the widely used glibc library. All of our products and services were found to be using affected versions of the library. Exploitation of the vulnerability requires conditions which do not exist in many of our products. Rather than delay patches by exhaustively analyzing all our products and services for the required precondition, we have elected to patch all products and services.
&&As of Wednesday, January 28th, all of our web based services were patched with new versions of glibc.&Patches for NG Firewall became available just after midnight Thursday, January 29.
This afternoon, January 30th, at 18:30 PST we released Security Definition 2.1.15715. This update applies to all version of the following products manufactured after June, 2009:
Barracuda Spam and Virus Firewall
Barracuda Web Filter
Barracuda Message Archiver
Barracuda Web Application Firewall
Barracuda Firewall
Barracuda Load Balancer
Barracuda Load Balancer ADC
Barracuda Link Balancer
Barracuda SSL VPN
Barracuda Backup Server
For maximum protection, Barracuda Networks recommends that all customers ensure that their attack and security definitions are set to On and to upgrade to the latest generally available release of the firmware and security definitions.
Update to default Barracuda Networks product security configurations
受影响产品
Barracuda Spam v6.1.5 and earlier, Barracuda Web Filter v7.1.0 and earlier, Barracuda Message Archiver v4.0.0 and earlier, Barracuda Web Application Firewall v7.9.1 and earlier, Barracuda Link Balancer 2.6.0 and earlier, Barracuda Load Balancer v4.2.3 and earlier, Barracuda Load Balancer ADC v5.1.1 and earlier, Barracuda Firewall Version 6.1, Barracuda SSLVPN v2.6.1, Cudatel Version 3.0.5 and earlier
This morning we released Security Definition 2.1.15570 which eliminates some accounts and configuration settings left behind from our manufacturing and testing processes. To exploit these artifacts an attacker would require physical access to the customer&s appliance or hypervisor or access to specific Barracuda Networks internal systems. There are no known cases of these accounts or settings being exploited.
For maximum protection, Barracuda Networks recommends that all customers ensure that their attack and security definitions are set to On and to upgrade to the latest generally available release of the firmware and security definitions.
Barracuda NG Firewall v5.4.4 Hotfix 652 - SSH Security Update
受影响产品
Barracuda NG Firewall 5.4.x
We recently received a report of a race condition in the installation process of NG Firewall 5.4.x which could make the SSH management interface accessible on external interfaces. In cases where this occurs, the problem disappears after a reboot of the box or after certain configuration changes.
Your system may be affected if the following conditions are met:
& The Barracuda NG Firewall is running firmware 5.4.1, 5.4.2, 5.4.3 or 5.4.4
& A USB installation was performed with an existing PAR configuration file
& The box was not manually rebooted afterwards
This morning we released Hotfix 652 to NG Firewall v5.4.4 to address this issue. It is available to customers on the download portal.&
For maximum protection, Barracuda Networks recommends that all customers ensure that their attack and security definitions are set to On and to upgrade to the latest generally available release of the firmware and security definitions.
Barracuda Networks products and CVE-, CVE-, and CVE-: aftershock and two related vulnerabilities
受影响产品
Multiple Barracuda Products and Services
This morning we released Security Definition 2.1.14193 to patch CVE-, CVE-, and CVE- (&aftershock& and two other related vulnerabilities) in the widely used GNU bash utility affecting a broad range of systems across the Internet. This Security Definition is available to all our appliance customers with active Energize Update subscriptions.&
In the aftermath of CVE- (shellshock), we are continuing to aggressively patch and test our products and services to secure them against new &vulnerabilities being reported, and have been following industry best practices around remediation. &
You can find a detailed analysis of the issue and our remediation steps at&
We are continuing to monitor this developing situation and will be updating this alert with additional details as they become available.
Barracuda Networks products and CVE-: shell shock vulnerability
受影响产品
Multiple Barracuda Products and Services
On the morning of &September 24th, 2014 we were notified&of&&a vulnerability in the widely used GNU bash utility (CVE-) affecting a broad range of systems across the Internet.
Since then, we have been aggressively patching and testing our products and services to secure them against this vulnerability, and have been following industry best practices around remediation. On Wednesday , September 24 at 23:00 PDT we released Security Definition 2.1.14182 to patch CVE- for our appliance customers&with active Energize Update subscriptions on the current harwdware platforms. In addition, &all of our web services had also been patched as of Wednesday evening.&
You can find a detailed analysis of the issue and our remediation steps at&.
We are continuing to monitor this developing situation and will be updating this alert with additional details shortly.
Resolved issue with Barracuda Firewall which could allow information disclosure and unauthorized access
受影响产品
Barracuda Firewall 6.1.0 and earlier
On May 19, 2014, we released security definition 2.1.12665 to address a vulnerability that could allow a user to remove directories from the Barracuda Firewall file system under certain circumstances. For maximum protection, Barracuda Networks recommends that all customers ensure that their attack and security definitions are set to On and to upgrade to the latest generally available release of the firmware and security definitions.
Resolved issue with Cudatel which could allow fraudulent international calls in older firmware versions
受影响产品
On April 29, 2014, we discovered a vulnerability in which fraudulent international calls could be established by an attacker. We isolated the incident to a handful of customers, and directly contacted everyone impacted.
On April 29, 2014, an automated firmware update was made available to all Cudatel customers running firmwares 2.6.6 and later to resolve the internally reported issue. May 3, 2014, secdef 2.1.12437 was released to patch units running firmwares 2.6.5 and earlier.
For maximum protection, Barracuda Networks recommends that all customers ensure that their attack and security definitions are set to On and to upgrade to the latest generally available release of the firmware and security definitions.
Barracuda Firewall and CVE-: OpenSSL Heartbleed vulnerability update
受影响产品
Barracuda Firewall
This Security Definition eliminates the requirement of Security Definition 2.1.12177, released on April 11, that the customer reboot the Barracuda Firewall for the patch to complete installation. Upon installation of this definition the appliance will not be vulnerable to the Heartbleed bug even if the appliance is not restarted.
Barracuda Networks products and CVE-: OpenSSL Heartbleed vulnerability
受影响产品
Barracuda Web Application Firewall, Barracuda Web Filter, Barracuda Message Archiver, Barracuda Firewall, Barracuda Load Balancer ADC, Barracuda Load Balancer, Barracuda Link Balancer, Cudatel, Barracuda Email Security Service, Barracuda Backup Service, Barracuda Cloud Control, Copy, and SignNow
On April 7, 2014 an exploitable vulnerability in OpenSSL was reported by US-CERT/NIST.
OpenSSL is widely used in internet infrastructures, and this vulnerability was introduced into OpenSSL in December 2011.
The vulnerability is the result of a missing bounds check in the OpenSSL code that handles the TLS 'heartbeat' messages.
Someone with malicious intent can exploit this vulnerability by requesting that a running TLS server return up to 64KB of its private memory space.
Since this is the same memory space where OpenSSL stores the server's private key material, an attacker can potentially obtain long-term server private keys, TLS session keys, or usernames / passwords.
The vulnerability was first introduced in OpenSSL release version 1.0.1 on March 14, 2012. OpenSSL 1.0.1g, released on April 7, 2014, fixes the vulnerability.
for additional details.
We have been patching and testing our products and services to secure them against this vulnerability, and have been following the internet security industry’s recommended procedures.
Securing Appliance Products
We have released updated, secured, versions of all affected products.
On April 11, 2014, Barracuda issued a Security Definition, version 2.1.12177, which secures all affected Barracuda products in the field.
Barracuda strongly recommends customers reboot their appliance to ensure it is secure.
Securing Cloud Services
All Barracuda cloud services: Barracuda Cloud Control, Barracuda Backup Service, Barracuda Email Security Service, Copy, and SignNow have been patched to ensure they are no longer vulnerable. This action was completed on Wednesday, April 9, 2014.
SSL certificates have been re-keyed and re-issued for all services. Old certificates are being revoked.
We are forcibly resetting all browser sessions. Users may have been logged out as a result of this reset. This was a simple and low-impact method to protect any session keys that may have been compromised.
Affected Appliance Firmware Versions:
Barracuda Web Filter Version 7.0 through 7.1
Barracuda Message Archiver
Version 3.5 and 3.6
Barracuda Web Application Firewall Version 7.8
Barracuda Link Balancer Version 2.5
Barracuda Load Balancer Version 4.2
Barracuda Load Balancer ADC Version 5.0 through 5.1
Barracuda Firewall Version 6.1
Cudatel Version 3.0 and earlier
If any customer has questions or concerns, please contact Barracuda Networks technical support at 408-342-5400
Updated information is available and will be posted as available on Barracuda’s product management blog:
Resolved issue in which the Barracuda Web Application Firewall XSS protections can be evaded using specially crafted requests
受影响产品
Barracuda Web Application Firewall
On July 17, 2013, security researcher Roberto Suggi Liverani of NCIA / NCIRC reported that the cross site scripting (XSS) detection mechanisms of the Barracuda Web Application could be bypassed when the attack payload is encoded using the Data URI scheme with base64 encoding (RFC 2397). Our research team has confirmed that all versions of the Barracuda Web Application Firewall are affected.
Firefox is the only major browser vendor that is vulnerable to this threat vector, as it allows JavaScript execution of data embedded in Data URIs. IE, Safari and Chrome implement various security measures to prevent attacks that use this format. This
We have released Attack Definition version 1.59 on July 30, 2013 to address this threat vector. There are no known cases of any customers who have been affected. The fix works by blocking requests that have Data URIs embedded in Web based inputs.
Customers who have enabled automatic updating of their Attack Definitions should verify that their current installed version is 1.59 or higher. Those customers who have disabled automatic updating of Attack Definitions should manually update to the latest Attack Definition from the ADVANCED -> Energize Updates screen.
Attack Definition version 1.59 applies to all firmware versions. This will address all cases where Data URI with base64 encoding is used for injection attacks. Firmware version 7.8.1 will provide the ability to enforce additional protection to decode and inspect all base64 encoded data, even outside of Data URI format, though we are not aware of any such attacks on the server side at this time. For maximum protection, Barracuda Networks recommends that all customers ensure that their attack and security definitions are set to On and to upgrade to the latest generally available release of the firmware and security definitions.
Resolved issues with retrieving virus pattern updates for NG Firewalls
受影响产品
Barracuda NG Firewall
This security update resolves a BUG introduced in Firmware Version 5.4.1.
Due to an update of the Malware Protection Engine the Anti-Virus service was no longer able to retrieve virus pattern updates from the Avira download servers.
Your system may be affected if the following conditions are met:
The Barracuda NG-Firewall is running firmware version 5.4.1 (NGAdmin -> Status Page -> Firmware Version)
A Virus Scanner Service is active (NGAdmin -> Configuration -> Virtual Servers -> Service: Anti-Virus)
The Avira-Engine is enabled in Virus Scanner Settings (NGAdmin -> Configuration -> Virtual Servers -> service: Anti-Virus -> Basic Setup: Enable Avira Engine)
Installing Hotfix 528 is going to automatically
update Avira-Virus patterns to the latest version available (to date: July, 5th
fix the Virus Scanner update component to retrieve updates from the correct remote location
Affected version(s):
NG-Firewall == 5.4.1
The issue has been resolved in version(s):
NG-Firewall >= 5.4.2
This issue does NOT affect version(s):
NG-Firewall <= 5.2.8
Hotfix 528 will also be included in firmware version 5.4.2
IMPORTANT: By updating the Malware Protection Engine the license enforcement has been changed: In case the Malware Protection license has expired, any traffic that is forwarded to the Malware Protection Engine will not be scanned and blocked. In order to not block such traffic the Anti-Virus service needs to be disabled.
Resolved issue with persistent XSS in Barracuda Spam & Virus Firewall
受影响产品
Barracuda Spam & Virus Firewall
On June 3, 2013, security researcher Justin Steven () reported two related instances of a remotely exploitable persistent XSS attack against the Barracuda Spam & Virus Firewall. Our research has confirmed that all versions of the Barracuda Spam & Virus Firewall are affected.
Today we released Security Definition version 2.0.8 to address all known means of exploiting these issues. There are no known cases of any customers who have been affected.
Customers who have enabled automatic updating of their Security Definitions should verify that their current installed version is 2.0.8 or higher.
Those customers who have disabled automatic updating of Security Definitions should manually update to the latest Security Definition from the Advanced -> Energize Updates screen.
Security Definition version 2.0.8 will only apply to firmware versions 3.5 and later.
Barracuda Networks recommends that all customers with active Energize Updates subscriptions to upgrade to the latest available firmware release supported for their hardware platforms.
Customers with hardware platforms over four years old are encouraged to take advantage of the Barracuda Networks Hardware Refresh Program described on .
Resolved issue in which non-root shell accounts are able to read password hashes of /etc/shadow.
受影响产品
Barracuda NG Firewall
This security update resolves an internally reported vulnerability in which non-root shell accounts are able to read password hashes of /etc/shadow.
Non-root shell accounts are not configured on the unit in the default configuration delivered from the factory. They are configured in Box->Administrators with "System Level Access" being set to Standard or Restricted OS Login. Configuring shell access like this is typically only done for auditing purposes to provide named administrative accounts for trusted admins.
If you have not configured any shell level access to your NG Firewall then you are not vulnerable to this issue.
Installing this hotfix will ensure that file permissions are properly set.
Affected Software:
NG-Firewall 5.2.4 - 5.2.7
NG-Firewall 5.4.1
The issue has been resolved in versions:
Hotfix 519 - for release 5.4.1
Hotfix 520 - for releases 5.2.4 - 5.2.7
Resolved issue with allowed inbound ip addresses for remote support
受影响产品
Barracuda Spam and Virus Firewall, Barracuda Web Filter, Barracuda Message Archiver, Barracuda Web Application Firewall, Barracuda Link Balancer, Barracuda Load Balancer, Barracuda SSL VPN, CudaTel
Today we released secdef 2.0.7 as part of ongoing work to address previously reported issues surrounding Barracuda Networks' ability to remotely support customers. Since Barracuda shipped the original appliances, the local firewall rules on each appliance were configured to restrict customer authorized remote access to Barracuda-owned IP addresses. To ensure our ability to support these units, the firewall was configured such that new support servers could be added without requiring updates to the appliances in the field.
An attacker with access to a machine on any of the IP ranges in the vulnerability report, and with knowledge of the system internals, could gain access to an exposed appliance. However, in order to actually breach the system, the appliance must either have been deployed directly on the Internet with a public IP address or the attacker must have been on the same private network as the appliance in order for it to be exposed. To our knowledge, no system was breached as a result of this vulnerability.
Additional details of the issues and
Resolved issue with ssh access to units deployed outside the firewall
受影响产品
Barracuda Spam and Virus Firewall, Barracuda Web Filter, Barracuda Message Archiver, Barracuda Web Application Firewall, Barracuda Link Balancer, Barracuda Load Balancer, Barracuda SSL VPN, CudaTel
Revision A1.1: revised
to put version numbers on Affected Product(s) and correct erroneous report that Barracuda Link Balancer and Barracuda Load Balancer are affected
On Nov 29, 2012, Stefan Viehb?ck of SEC Consult Vulnerability Lab (),
reported two issues affecting the Barracuda SSLVPN that an attacker could use to gain unauthorized access to the appliance.
Our research has confirmed that an attacker with specific internal knowledge of the Barracuda appliances may be able to remotely log into a non-priveleged account on the appliance from a small set of IP addresses. The vulnerabilities are the result of the default firewall configuration and default user accounts on the unit.
All Barracuda Networks appliances with the exception of the Barracuda Backup Server, Barracuda Firewall, and Barracuda NG Firewall are potentially affected.
Barracuda Spam and Virus Firewall v5.1.2.006 and earlier
Barracuda Web Filter v6.0.1.006 and earlier
Barracuda Message Archiver v3.2.0.014 and earlier
Barracuda Web Application Firewall v7.6.4.012
Barracuda SSL VPN v2.3.2.113 and earlier
Barracuda Appliance Control v3.0.16.015 and earlier
Cudatel v2.6.001.030 and earlier
Customers are advised to update their Security Definitions to v2.0.5 immediately.
While this update drastically minimizes potential attack vectors, our support department is available to answer any questions on fully disabling this functionality if support access is not desired.
Resolved issue with access to potentially insecure files on Barracuda SSL VPN
受影响产品
Barracuda SSL VPN
Today, Barracuda Networks issued security definition 2.0.5 () to update the product info file structure in affected firmware versions 2.2.2.203 and below to prevent access to any potentially insecure files. Stefan Viehb?ck of SEC Consult Vulnerability Lab () collaborated with Barracuda Networks to report and resolve this issue.
Customers are advised to update their Security Definitions to v2.0.5 immediately.
For maximum protection, Barracuda Networks recommends that all customers ensure that their security definitions are set to On and to upgrade to the latest generally available release of the firmware and security definitions.
Resolved parameter validation issue with Barracuda Web Application Firewall for authenticated administrators
受影响产品
Barracuda Web Application Firewall
Recently, security researcher Adam Chester, an independent security consultant, discovered and worked with Barracuda Networks to resolve a cross-site scripting vulnerability in the Barracuda Web Application Firewall that affects authenticated administrators. Under certain circumstance it is possible for potential attackers to insert scripting code into parameters after logging into the Barracuda Web Application Firewall.
Barracuda Networks resolved this issue identified by Adam Chester in firmware release 7.7 (). For maximum protection, Barracuda Networks recommends that all customers upgrade to the latest generally available release of the firmware.
Resolved issue with ISC BIND with Barracuda NG Firewall and Barracuda Link Balancer
受影响产品
Barracuda NG Firewall, Barracuda Link Balancer
Recently, security researchers discovered an issue with ISC BIND where a remote attacker can cause a denial of service (assertion failure and named daemon exit) via a query for a long resource record.
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-
https://www.kb.cert.org/vuls/id/120541
Barracuda Networks resolved this issue by updating the embedded ISC BIND and making generally available firmware releases for the following products:
Barracuda NG Firewall Release 4.2.19
Barracuda NG Firewall Release 5.0.6
Barracuda NG Firewall Release 5.2.4
Barracuda Link Balancer Release 2.4.1.015
For maximum protection, Barracuda Networks recommends that all customers upgrade to the latest generally available release of the firmware.
Resolved parameter validation issue with the Barracuda SSL VPN for authenticated users
受影响产品
Barracuda SSL VPN
Recently, security researcher Benjamin Kunz Mejri at Vulnerability Research Laboratory () discovered and worked with Barracuda Networks to resolve a cross-site scripting vulnerability in the Barracuda SSL VPN for authenticated users to the Barracuda SSL VPN. Under certain circumstance where a user has logged into the Barracuda SSL VPN over the internet, it is possible for potential attackers to insert scripting code into parameters.
Barracuda Networks resolved this issue identified by Benjamin Kunz Mejri in firmware release 2.2.2.203 ().
For maximum protection, Barracuda Networks recommends that all customers upgrade to the latest generally available release of the firmware.
Resolved issue with Cudatel which could allow fraudulent international calls in older firmware versions
受影响产品
On April 29, 2014, we discovered a vulnerability in which fraudulent international calls could be established by an attacker. We isolated the incident to a handful of customers, and directly contacted everyone impacted.
On April 29, 2014, an automated firmware update was made available to all Cudatel customers running firmwares 2.6.6 and later to resolve the internally reported issue. May 3, 2014, secdef 2.1.12437 was released to patch units running firmwares 2.6.5 and earlier.
For maximum protection, Barracuda Networks recommends that all customers ensure that their attack and security definitions are set to On and to upgrade to the latest generally available release of the firmware and security definitions.
Temporary suspension of spam and virus definition updates
受影响产品
Barracuda Spam & Virus Firewalls
Between May 24, 3:45 PDT and May 25, 16:00 PDT, Barracuda Central temporarily suspended automatic spam and virus definition updates for Barracuda Spam & Virus Firewall.
During this period, customers remained fully protected by the Barracuda Real-Time System.
The reason for temporary suspension was an investigation related to spam definition 3.2.2.6-05-24 034013 PST) that exposed an already resolved software defect in firmware releases 4.0 and 4.1. Once the defect was identified, automated definition updates were resumed. Customers running firmware release 5.0.0.003 and higher were unaffected.
Barracuda Networks recommends updating to the latest firmware release 5.0.0.022 and enabling automatic spam and virus definition updates. The setting can be enabled by going to Advanced -> Energize updates page.
Misclassified URL delivered with spam definition update 3.2.2.61354
受影响产品
Barracuda Spam & Virus Firewalls
On April 19, 2011 at 4:18 PM PDT, spam definition 3.2.2.6-04-19 16:18) contained a misclassified URL that could have resulted in the delay of a small number of legitimate emails with a reason of "Intent".
This cause of this issue was operational in nature and was corrected on April 20, 2011 at 1:03 AM PDT in spam definition 3.2.2.6-04-20 01:03).
As part of the of the correction, all messages improperly stopped will be automatically released and delivered within 24 hours of the original delivery attempt.
If you believe that some emails still have not been delivered, please contact Barracuda Networks Technical Support.
Safeguards have been implemented into Barracuda Central operations to avert future similar misclassifications.
Resolved issue with miscategorized email in select Barracuda Spam & Virus Firewalls
受影响产品
Barracuda Spam & Virus Firewalls running firmware release 4.0 and higher
On April 7, 2011 at 9:05AM PDT, a human error occurred at Barracuda Central that could have resulted in a small number of legitimate emails being classified as spam.
The root cause of this issue was operational in nature.
At 9:48AM PDT, Barracuda Central engineers resolved the issue.
Please note that customers running firmware release 4.0 and higher may see messages initially logged in the user interface with a delivery status of “blocked”
that may have been ultimately delivered to end users.
Customers concerned that emails in this period were not delivered should contact Barracuda Networks Technical Support.
Preventative measures have been implemented into Barracuda Central operations to avert future miscategorization.
Barracuda Spam & Virus Firewalls may have disabled automated spam definitions upon receiving spam update 3.2.2.42448
受影响产品
Barracuda Spam & Virus Firewalls Serial #BAR-SF-166331 and higher
On October 1, 2010 at 12:55 PM PDT, a faulty spam definition 3.2.2.42448 contained a corrupted file
that may have disabled some Barracuda Spam & Virus Firewalls, serial # BAR-SF-166331 and higher, from receiving future automated spam definitions.
The cause of the corrupted spam definition has been identified and resolved, and additional measures have been put in place to prevent this issue from occurring in the future.
To resolve this issue, customers who have affected Barracuda Spam & Virus Firewalls that still see spam definition 3.2.2.42448 as their current installed version, should go to the Advanced -> Energize Updates page and click on the Update button to trigger a manual update of their spam definition to version
3.2.2.-10-04) or higher.
Upon triggering a manual spam definition update affected appliances will then receive future automated spam definitions.
Sanitized inputs to online help viewer in select Barracuda Networks appliances
受影响产品
Barracuda IM Firewall 3.4.01.004 and earlierBarracuda Link Balancer 2.1.1.010 and earlierBarracuda Load Balancer 3.3.1.005 and earlierBarracuda Message Archiver 2.2.1.005 and earlierBarracuda Spam & Virus Firewall 4.1.2.006 and earlierBarracuda SSL VPN 1.7.2.004 and earlierBarracuda Web Application Firewall 7.4.0.022 and earlierBarracuda Web Filter 4.3.0.013 and earlier
Today, Barracuda Networks issued security definition 2.0.4 () to update the online help viewer in affected firmware versions to prevent inputs of parameters attempting directory traversals.
In addition, Barracuda Networks released updated firmware versions on all affected products.
Security researchers Randy Janinda and Sanjeev Sinha, Security Consultants at SecureWorks collaborated with Barracuda Networks to report and resolve this issue.
For maximum protection, Barracuda Networks recommends that all customers ensure that their security definitions are set to On and to upgrade to the latest generally available release of the firmware.
Updated keys and authentication mechanism between Barracuda Networks appliances and Barracuda Central
受影响产品
All Barracuda Networks Products
Recently, Barracuda Networks issued security definition 2.0.3 () to update the keys and authentication mechanism of Barracuda Networks appliances with Barracuda Central servers that deliver Energize Updates and new firmware.
This change better protects the account status of legitimate Barracuda Networks customers against those who attempt to clone or forge their credentials.
For maximum protection, Barracuda Networks recommends that all customers ensure that security definitions are set to On.
Resolved vulnerability in the TLS/SSL protocol during session renegotiation in select Barracuda Networks products
受影响产品
Barracuda IM Firewall Release 4.1 and earlierBarracuda Link Balancer Release 1.3.1.006 and earlierBarracuda Load Balancer Release 3.0 and earlierBarracuda Message Archiver Release 2.1.0.014 and earlierBarracuda Spam & Virus Firewall Release 4.0.1.009 and earlierBarracuda SSL VPN Release 1.5.0.028 and earlierBarracuda Web Application Firewall Release 7.3.1.007 and earlierBarracuda Web Filter Release 4.2.0.010 and earlier
Recently, security researchers discovered an issue where arbitrary code could be injected into the beginning of a TLS/SSL session during key renegotiation by a remote attacker conducting a man-in-the-middle (MITM) attack.
In order for code to be injected an attacker would need access to a network along the path of communication between the client and the server.
Details of the vulnerability can be viewed here:
Barracuda Networks resolved this issue by disabling TLS/SSL renegotiation and making generally available firmware releases for the following products:
Barracuda IM Firewall Release 4.2.01.001
Barracuda Link Balancer Release 1.3.2.005
Barracuda Load Balancer Release 3.1.015
Barracuda Message Archiver Release 2.1.0.015
Barracuda Spam & Virus Firewall Release 4.0.1.010
Barracuda SSL VPN Release 1.5.0.29
Barracuda Web Application Firewall Release 7.3.2.012
Barracuda Web Filter Release 4.2.0.012
For maximum protection, Barracuda Networks recommends that all customers upgrade to the latest generally available release of the firmware.
Resolved incidence of displaying incorrect subscription and activation status being reported in select Barracuda Networks products
受影响产品
Barracuda IM Firewall Release 3.4 and laterBarracuda Link Balancer Release 1.1 and laterBarracuda Load Balancer Release 2.4 and laterBarracuda Message Archiver Release 2.0 and laterBarracuda Spam & Virus Firewall Release 4.0 and laterBarracuda SSL VPN Release 1.0 and laterBarracuda Web Application Firewall Release 7.3 and laterBarracuda Web Filter Release 4.2 and later
At approximately 8:30AM PDT, one server in the Barracuda Networks update infrastructure experienced a database corruption.
As a side effect of this incident, a subset of customer systems running newer firmware releases querying for subscription and activation status received invalid responses.
Upon receiving these invalid responses, the affected Barracuda Networks products displayed error messages indicating an inactivated state.
Other than potential interactions with the graphical user interface when changing configurations or after a hard reboot, Barracuda Networks products continued to operate in their normal capacity.
At approximately 8:45AM PDT, the affected server was taken offline and a redundant server was put in production to properly respond to subscription and activation status queries.
By 10:00AM PDT, all affected Barracuda Networks products in the field should have been displaying proper activation and subscription status.
Since this incident, Barracuda Networks has implemented software mitigation techniques to detect this form of database corruption and to suppress invalid query responses going forward.
Barracuda Networks resolved this issue and all affected products should report the correct status.
If any Barracuda Networks products still report the wrong subscription or activation status, please contact Barracuda Networks Technical Support.
Resolved issues with legacy Barracuda Spam & Virus Firewalls SNMP queue monitoring and troubleshooting utilities
受影响产品
Barracuda Spam & Virus Firewall Release 3.5.10 and 3.5.11
As a side effect of the recent security definition 2.0.1 (), legacy Barracuda Spam & Virus Firewalls running Firmware Release 3.5.10 and 3.5.11 experienced issues with SNMP queue monitoring and troubleshooting utilities.
Barracuda Networks reverted these changes on these older firmware versions through security definition 2.0.2 () to resolve the issues with SNMP queue monitoring and troubleshooting utilities.
With this change, administrators are encouraged to upgrade Barracuda Spam & Virus Firewalls running Firmware Release 3.5.10 and 3.5.11 the latest generally available release to be protected from the Barracuda Console Configuration Tool issue discovered by security researcher Jon Oberheide
For maximum protection, Barracuda Networks recommends that all customers upgrade to the latest generally available release of the firmware 3.5.12.023 () and ensure that security definitions are set to On.
Resolved input field validation issues associated with the Barracuda Console Configuration Tool in select Barracuda Networks products.
受影响产品
Barracuda IM Firewall Release 3.4 (generally available: ) and earlierBarracuda Link Balancer Release 1.1.028 (generally available: ) and earlierBarracuda Load Balancer Release 2.5.011 (generally available: ) and earlierBarracuda Message Archiver Release 1.1.0.010 (generally available:
) and earlierBarracuda Spam & Virus Firewall Release 3.5.12.012 (generally available: ) and earlierBarracuda SSL VPN Release 1.2.6.004 (generally available: ) and earlierBarracuda Web Application Firewall Release 7.2.2.005 (generally available: ) and earlierBarracuda Web Filter Release 4.1.0.013 (generally available: ) and earlier
Recently, security researcher Jon Oberheide () discovered and worked with Barracuda Networks to resolve a field input validation issue in the Barracuda Console Configuration Tool.
Reproducing the issue requires physical access to the Barracuda Networks appliance itself through physical keyboard and monitor connections.
The issue does not apply to any access over networking protocols.
Barracuda Networks resolved this issue identified by Jon Oberheide () by making generally available firmware releases for the following products and issuing a security definition 2.0.1 ():
Barracuda IM Firewall Release 4.0 ()
Barracuda Link Balancer Release 1.1.030 ()
Barracuda Load Balancer Release 3.0 ()
Barracuda Message Archiver Release 2.1 ()
Barracuda Spam & Virus Firewall Release 3.5.12.012 ()
Barracuda SSL VPN Release 1.2.7.010 ()
Barracuda Web Application Firewall Release 7.3 ()
Barracuda Web Filter Release 4.1.0.015 ()
For maximum protection, Barracuda Networks recommends that all customers upgrade to the latest generally available release of the firmware and ensure that security definitions are set to On.
Barracuda Networks warns against rogue antivirus program
受影响产品
On June 10, 2009, Barracuda Networks Inc, the worldwide leader of content security appliances, became aware of a Web Site promoting a rogue spyware program called “Barracuda Antivirus.”
If downloaded, the program will install spyware that will display pop-up ads and other unwanted applications.
The “Barracuda Antivirus” program is not in any way associated with Barracuda Networks and is just one of a string of recent examples of hackers attempting to spread malicious programs using an established and trusted security brand.
All Barracuda Networks products have been updated with the latest definitions to protect our customers from visiting or downloading content from this rogue site.
Barracuda Networks has also contacted fellow Internet security vendors to ensure that their databases are also updated to protect customers from inadvertently accessing the Web sites.
Barracuda Load Balancer resolved parameter validation issue with the Login page
受影响产品
Barracuda Load Balancer Release 2.3.024 (generally available: ) and earlier
Recently, security researcher Jan Skovgren, Security Consultant at FortConsult () discovered and worked with Barracuda Networks to resolve a cross-site scripting vulnerability in the Barracuda Load Balancer login page. Under certain circumstance where the Barracuda Load Balancer management user interface is accessible over the Internet, it was possible for potential attackers to insert Javascript code into parameters.
Barracuda Networks resolved this issue identified by Jan Skoygren in firmware release 2.4.006 ().
For maximum protection, Barracuda Networks recommends that all customers either restrict Internet access to the management user interface from their network firewalls or upgrade to the latest generally available release of the firmware.
Resolved input field validation and HTML encoding
issues in select Barracuda Networks products
受影响产品
Barracuda Message Archiver Release 1.1.0.010 () and earlier Barracuda Spam Firewall Release 3.5.11.020 () and earlier Barracuda Web Filter Release 3.3.0.038 () and earlier Barracuda IM Firewall Release 3.0.01.008 () and earlier Barracuda Load Balancer Release 2.2.006 () and earlier
Recently, security researcher Dr. Marian Ventuneac of Data Communication Security
Laboratory, Department of Electronic and Computer Engineering at University of Limerick,
discovered
and worked with Barracuda Networks to resolve input field validation and HTML
encoding issues in select Barracuda Networks products that resulted in
cross-site scripting vulnerabilities in specific screens and fields.
Reproducing all
of these issues required that administrators log in to the appliance.
Networks resolved all of the issues identified by Dr. Ventuneac by making
generally available firmware releases for the following products:
Message Archiver Release 1.2.1.002 ()
Spam Firewall Release 3.5.12.007 ()
Web Filter Release 3.3.0.052 ()
IM Firewall Release 3.1.01.017 ()
Load Balancer Release 2.3.024 ()
The CERT CVE number for these reported issues is CVE-.
For maximum protection, Barracuda Networks recommends
that all customers upgrade to the latest generally available release of the
Barracuda Spam Firewall resolved potential issue associated with the Users -> Accounts View page
受影响产品
Barracuda Spam Firewall Release 3.5.11.020 () and earlier
security researcher Dr. Marian Ventuneac of Data Communication Security
Laboratory, Department of Electronic and Computer Engineering at University of Limerick,
discovered and worked with Barracuda Networks
to resolve a potential issue in the Barracuda Spam Firewall Users -> Account View page. Reproducing the issue
administrators to first log in to the Barracuda Spam Firewall, visit
the Users -> Account View page and select the 'Message Count =' search filter from a list of
over a dozen search filters. In the
pattern field, it was possible to inject SQL which could lead to direct access
to the configuration database.
Networks resolved this issue identified by Dr. Ventuneac of Data Communication Security Laboratory by making generally available firmware release 3.5.12.007
The issue itself carried a
low risk rating, because it required access as a global administrator that
already has unrestricted read/write access to the configuration database
through the application itself.
CVE number for this reported issue is CVE-.
For maximum protection, Barracuda Networks recommends
that all customers upgrade to the latest generally available release of the
Configuration changes to all Barracuda Spam Firewalls upon upgrade to Firmware Release 3.5.12
受影响产品
Barracuda Spam Firewall Release 3.5.12
On July 14, 2008, Barracuda Networks released Barracuda Spam Firewall Release 3.5.12.001 into beta release.
Upon upgrading to firmware release 3.5.12, three one-time configuration changes will be made to your Barracuda Spam Firewall:
Disabling of bounce messages. On the Basic ->
Spam Scoring page, in the Spam Bounce (NDR) Configuration section, the Send
Bounce field will be set to No.
Because of the growing number of spam emails spoofing addresses of good email senders, this change is being made to avoid sending bounce messages to innocent parties.
Removal of Spamhaus external block lists previously listed
as “Common External Blacklists.” On the
Block/Accept
-> IP Reputation page, the following Spamhaus external block lists will be removed from the Custom External RBLs list: sbl.spamhaus.org, xbl.spamhaus.org
and sbl-xbl.spamhaus.org.
The Barracuda Spam Firewall used to enable Spamhaus external block lists by default when usage of those lists was free to all Internet users.
Now that Spamhaus is seeking license fees from some Internet users, this change is being made to remove the previous default settings and to ensure that Barracuda Spam Firewall customers do not experience problems or unexpected service interruptions.
Replacement of removed Spamhaus external block lists with
Barracuda IP Reputation. If any Spamhaus external block lists were removed by the previous action
and the Barracuda IP Reputation field was set to Off, the Barracuda IP
Reputation will be set to the most restrictive action of all of the removed
Spamhaus external block lists.
For example, if sbl.spamhaus.org was set to Block and Barracuda IP Reputation was
set to Off, the upgrade would remove sbl.spamhaus.org from the Custom External
RBLs list and set Barracuda IP Reputation to Block.
The purpose of this change is to maintain or improve performance of the Barracuda Spam Firewall.
Barracuda Networks strongly recommends blocking based on Barracuda IP Reputation, and this blocking is particularly important when external block lists such as Spamhaus are not in use.
changes will be made only once.
want to re-enable bounce messages and reinsert the affected Spamhaus external
block lists, you may do so manually after the upgrade.
Barracuda Networks recommends that you create a
new backup of your configuration after upgrading to firmware release
Barracuda Spam Firewall resolved vulnerability associated with LDAP test script
受影响产品
Barracuda Spam Firewalls
Recently, security researcher Mark Crowther of Information Risk Management ( / ) discovered and worked with Barracuda Networks to resolve a cross-site scripting vulnerability in the Barracuda Spam Firewall ldap_test.cgi script. If a Barracuda Spam Firewall had unrestricted access from the Internet and no Administrator IP/Range configured, JavaScript code could be inserted in the parameters allowing for the possibility of cross-site scripting attacks.
Barracuda Networks resolved this issue identified by Information Risk Management by making generally available firmware release 3.5.11.025 ().
For maximum protection, Barracuda Networks recommends that all customers upgrade to the latest generally available release of the firmware.
Legacy Barracuda Spam Firewalls queued inbound email upon receiving virus update 2.2.18205
受影响产品
Barracuda Spam Firewall Release 3.4.10.087 () and earlier
On March 11, 2008 at 4:45 PM PDT, virus definition 2.2.18205 contained an
incompatibility with Barracuda Spam Firewalls running legacy firmware release
3.4.10.087 and earlier, using current virus definitions.
This incompatibility was the result of an
invalid reference in the virus system maintenance routines and triggered the
“hold down” protections in the Barracuda Spam Firewall.
To protect our customers against potential
errors in the virus system maintenance, the Barracuda Spam Firewall has a
built-in precautionary “hold down” feature that automatically prevents email
from being sent and keeps potentially infected emails from being delivered.
Barracuda Spam Firewall in the field running legacy firmware that received
virus definition 2.2.18205 immediately began to queue all incoming messages.
Because the change affected the virus system
maintenance routines, reverting and updating virus definitions did not resolve
the issue.
At 9:00 PM PDT, spam
definitions 3.0.69866 and 3.1.44577 were released that contained configuration
settings and a forced restart of the email scanning engine to mitigate the
all affected customers, Barracuda Spam Firewalls resumed normal processing of
email once they downloaded the new spam definition. No email should have been
lost as the result of this delay.
Barracuda Networks customers are strongly
advised to update to the latest generally available firmware release for the
most up-to-date protection against Internet threats.
Barracuda Spam
Firewall resolved user interface issue when Monitor Web Syslog screen is open
受影响产品
Barracuda Spam Firewalls Release 3.5.10.013 and earlier
Recently, security researcher
Federico Kirschbaum reported an issue in the Barracuda
Spam Firewall Web administration interface to Barracuda Networks. A cross-site scripting
vulnerability existed when logging in with a username containing JavaScript injections only while the “Monitor Web Syslog” screen was already opened by an authenticated user.
The risk rating of this issue
is low, because the usage of the “Monitor Web Syslog” screen is largely a
diagnostic utility and not typically used once syslog outputs are set up in
production environments.
Barracuda Networks resolved
this issue identified by Mr. Kirschbaum with generally available firmware
release 3.5.10.016 ().
For maximum protection,
Barracuda Networks recommends that all customers upgrade to the latest
generally available release of the firmware.
Barracuda Spam Firewall resolved vulnerability associated with use of zoo file decompression utility
受影响产品
Barracuda Spam Firewalls
Zoo is an archive file format and legacy compression program
that was popular in the mid-1980s. To support decompression of legacy zoo file
archives used in virus checking and enforcing file attachment policy, the
Barracuda Spam Firewall includes the zoo program. Recently, security researcher
Jean-Sébastien Guay-Leroux discovered an implementation error in the zoo program
which could result in an infinite loop and high utilization of system resources
in certain solutions.
On Monday, March 19, 2007, Barracuda Networks
delivered system settings to all Barracuda Spam Firewalls in the field to disarm
the potential zoo program vulnerability through Energize Updates. Barracuda
Networks credits Mr. Guay-Leroux on his research of this vulnerability and his
proposals for a mitigation strategy. Moreover, Barracuda Networks has changed
new systems shipping out of the factory to mitigate this zoo program
vulnerability.
All Barracuda Spam Firewalls running firmware release 3.4
or higher and virus definition 2.0.6399 or higher, should be free from the
vulnerability identified by Mr. Guay-Leroux. In addition, Barracuda Spam
Firewalls running firmware releases earlier than release 3.4 and virus
definition versions at 2.06399o or later should also be free from this
vulnerability.
For maximum protection, Barracuda Networks recommends that
all customers upgrade to the latest generally available release of the firmware.
Legacy Barracuda Spam Firewalls queued inbound email upon receiving virus update 2.1.6
受影响产品
Barracuda Spam Firewall Release 3.3 and earlier
On March 29, 2007 at 5:00 PM PDT, virus definition 2.1.6 targeted at recent Internet threat activity contained an incompatibility with legacy Barracuda Spam Firewall firmware releases 3.3 and earlier. To protect our customers against potential errors with incompatible versions, the Barracuda Spam Firewall has a built-in precautionary feature which automatically prevents email from being sent and keeps potentially infected emails from being delivered. Any Barracuda Spam Firewall in the field running legacy firmware that had received virus definition 2.1.6 immediately began to queue all incoming messages until a backward compatible virus definition became available. At 9:16 PM PDT, a backward compatible virus definition 2.1.18o was released. For all affected customers, Barracuda Spam Firewalls resumed normal processing of email once they downloaded the new definition, and no email should have been lost as the result of this delay. Barracuda Networks customers are strongly advised to update to the latest generally available firmware release for the most up-to-date protection against Internet threats.
Changes to Daylight Savings Time in U.S. supported by all Barracuda Networks products
受影响产品
All Barracuda Networks Products
The annual start and end dates for Daylight Savings Time (DST) in the United States will be changing on March 11, 2007, due to the Energy Policy Act of 2005 (USA: Public Law 109-58 / 109th Congress / Section 110). Clocks in the United States will need to &Spring Forward& one hour on the second Sunday in March (three weeks earlier than the previous first Sunday in April), and will &Fall Back& one hour on the first Sunday in November (one week later than the previous last Sunday in October).
Support for this change to DST is currently available in all Barracuda Networks products running the following firmware versions:
Barracuda Spam Firewall, version 3.4.08.038 and higher
Barracuda Web Filter, version 3.1.0.30 and higher
Barracuda IM Firewall, version 2.1.03 and higher
Barracuda Load Balancer, version 1.4.031 and higher
Any systems that are not already on at least the firmware versions named above should be upgraded as soon as possible to the latest available version.
Incorrect fingerprint definition delivered with virus definition update 2.0.3936
受影响产品
Barracuda Spam Firewall Release 3.4 and higher
On February 6, 2007 at 8:35 am PST, a virus definition was released that contained an incorrect spam fingerprint definition (virus definition 2.0.3936) to Barracuda Spam Firewalls running firmware release 3.4 and higher. This incorrect definition was removed by 9:15 am PST on the same day with virus definition 2.0.3939. Affected messages were blocked with a reason code of Fingerprint (TXT1). Please note that customers running firmware release 3.4 may see messages initially logged in the user interface with a delivery status of "blocked" that may have been ultimately delivered to end users through a subsequent update. Customers are advised to check for any potential false positives blocked for fingerprint definition TXT1 that were not subsequently delivered to end users. The root cause of this issue was operational in nature. Preventative measures have been implemented into Barracuda Central operations.
Virus definition 2.03606o delivered to all Barracuda Spam Firewalls
受影响产品
Barracuda Spam Firewall Release 3.4 and higher
Barracuda Central maintains two different forms of virus definition files. One form is used specifically for Barracuda Spam Firewalls running firmware release 3.4 and higher. The other form is denoted with a suffix of "o" in the version number and is used for the Barracuda Web Filter, Barracuda IM Firewall, and any Barracuda Spam Firewalls running versions earlier than release 3.4. On February 1, 2007 at 2:07am PST, Barracuda Central published virus definition 2.0.3606o to all Barracuda Spam Firewalls, creating a mismatch for those releases running firmware release 3.4 and higher. Upon detecting an incorrect virus definition file, Barracuda Spam Firewalls in the field immediately invoked a built-in precautionary mechanism to prevent potentially harmful emails from being sent. By 2:38am PST, a new virus definition file 2.0.3607 was issued to remedy this situation. During this period, the Barracuda Spam Firewalls accepted all messages and simply deferred them in a queue until they downloaded a new virus definition automatically. No email was lost as the result of this issue. This event was unrelated to the operational issue described in Technical Alert No. .
Incorrect fingerprint definition delivered with virus definition update 2.0.3568
受影响产品
Barracuda Spam Firewall Release 3.4 and higher
On January 31, 2007 at 2:20 pm PST, a virus definition was released that contained an incorrect spam fingerprint definition (virus definition 2.0.3568) to Barracuda Spam Firewalls running firmware release 3.4 and higher. This incorrect definition was removed by 3:15pm PST on the same day with virus definition 2.0.3572. Affected messages were blocked with a reason code of Fingerprint (IMG6370628). Please note that customers running firmware release 3.4 may see messages initially logged in the user interface with a delivery status of "blocked" that may have been ultimately delivered to end users through a subsequent update. Customers are advised to check for any potential false positives blocked for fingerprint definition IMG6370628 that were not subsequently delivered to end users. The root cause of this issue was operational in nature. Preventative measures for this particular issue have already been implemented into Barracuda Central operations.
Barracuda Web Filter “Proxies” content filter category errors in content filter definition 1.0.387
受影响产品
Barracuda Web Filter
On January 23, 2007 at 8:57pm PST, a content filter definition was released that had errors in the “Proxies” category (content filter definition 1.0.387). With this definition, Barracuda Web Filter policies blocking the “Proxies” content category also blocked certain sites normally categorized under the “Search Engine & Portals” category. By January 24, 2007 at 7:23am PST, a new content filter definition (1.0.389) was published. All Barracuda Web Filter systems in the field with active Energize Updates subscriptions should have been automatically updated with the corrected content filter definition by 10:38am PST the same day. The cause of these errors was an operational error at Barracuda Central, and it has been resolved. Additional quality assurance processes including both human and software checks have been implemented to avoid this problem in the future.
Barracuda Spam Firewall protects Adobe Reader users against cross-site scripting (XSS) vulnerability
受影响产品
Barracuda Spam Firewall
The Barracuda Spam Firewall incorporates rules that protect users from a
potentially harmful vulnerability in Adobe Reader.
The Adobe Reader vulnerability affects those users who utilize the
Adobe Reader plug-in that enables Adobe Acrobat Portable Document
Format (PDF) files to be opened from within their Web browsers. To
facilitate features such as populating fields in Acrobat forms, the
Adobe Reader contains the ability to pass URL parameters in Web links
to the Adobe Reader plug-in. However, if scripts are embedded within
the URL parameters, an attacker can run code in the user’s Web browser.
The exploit can be run against PDF documents posted on reputable Web
sites without requiring an attacker to compromise that site in any way.
To prevent the proliferation of emails that could exploit this
vulnerability, the Barracuda Spam Firewall now incorporates rules that
look for URLs referencing PDF files that contain URL parameters. When
scored with indicators of scripting, the Barracuda Spam Firewall will
automatically block these messages, protecting users from potentially
dangerous attacks.
All existing Barracuda Spam Firewall customers with active Energize
Updates subscriptions are currently protected against this
vulnerability. Existing customers running the version 3.0 spam rule
definitions should ensure that their version number is at 3.0.30651 or
higher. Existing customers running the version 3.1 spam rule
definitions should ensure that their version number is 3.1.5316 or
higher. Messages blocked by these rules can be identified with the rule
name PDF_EXPLOIT in the Barracuda Spam Report Rule Breakdown in the
blocked message headers.
Barracuda Spam Firewall resolved vulnerability associated with use of message encoder/decoder library
受影响产品
Barracuda Spam Firewall
To support multiple types of message encoding, the Barracuda Spam
Firewall utilizes an underlying encoder/decoder library known commonly
as Convert-Uulib. Older versions of this underlying library contained a
security vulnerability if called with invalid values. Barracuda
Networks credits security researcher Jean-Sébastien Guay-Leroux on his
research of this vulnerability and its impact on the Barracuda Spam
Firewall running versions earlier than 3.4.09.
As part of normal ongoing feature development, Barracuda Networks
updated the underlying encoder/decoder library with firmware release
3.4.09 and later. The most current generally available releases of
firmware are not subject to this known vulnerability.
Moreover, on November 29, 2006, system settings were delivered to
all Barracuda Spam Firewalls in the field via Energize Updates to
disable the underlying mechanisms behind this known vulnerability.
No Barracuda Spam Firewalls with current Energize Updates
subscriptions should be subject to the vulnerability identified by Mr.
Guay-Leroux. Barracuda Networks recommends that all customers upgrade
to the latest generally available release of the firmware.
Barracuda Spam Firewall disabled vulnerabilities for file disclosure and guest access
受影响产品
Barracuda Spam Firewall
Barracuda Networks had been working with a security researcher, Greg
Sinclair - security (at) nnlsoftware (dot) com - on two past
vulnerabilities related to both file disclosure and guest access. On
August 3, 2006, system settings were delivered to all Barracuda Spam
Firewalls in the field via Energize Updates to disable the underlying
mechanisms behind these vulnerabilities. As such, no Barracuda Spam
Firewalls with current Energize Updates subscriptions should be
affected by these vulnerabilities.
As part of the test rollout, these settings were initially delivered
with the upgrade to early release firmware 3.4.05.017 on July 14, 2006.
These settings were later successfully delivered with the upgrade to
generally available firmware 3.3.03.055 on July 18, 2006. While it is
generally recommended that customers upgrade to the latest release,
these upgrades are no longer necessary for protection against these
specific vulnerabilities identified by Mr. Sinclair.
To avoid future vulnerabilities, Barracuda Networks recommends that
customers restrict unnecessary external Web access to their Barracuda
Spam Firewalls.
Barracuda Networks credited Mr. Sinclair with his discovery in the release notes for firmware release 3.4.05.017.
Barracuda Spam Firewall queued inbound email upon receiving virus update 1.5.144
受影响产品
Barracuda Spam Firewall
On June 13, 2006 at 4:53 AM PDT today, a faulty virus definition was
released that had an incomplete virus database (virus definition
1.5.144). To protect our customers in the event such a circumstance
occurred, the Barracuda Spam Firewall has a built in precautionary
feature which automatically prevents email from being sent through in
order to keep potentially infected emails from being delivered. Any
Barracuda Spam Firewall in the field that had received virus definition
1.5.144 immediately began to queue all incoming messages until the
complete virus database became available. At 7:02 AM PDT, the majority
of Barracuda Spam Firewalls automatically received virus definition
1.5.145 containing the complete virus database, and email began to
process normally for those customers previously affected. The cause of
the incomplete virus definition has been identified and resolved, and
additional measures have been put in place to prevent this issue from
occuring in the future.
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