Skip to main content

Get your Bugzilla T-shirt!
or --> Design your own Bugzilla T-shirt, Sweatshirt, or Hoodie

4.2, 4.0.5, and 3.6.8 Security Advisory

Wednesday, April 18th, 2012

Bugzilla is a Web-based bug-tracking system used by a large number of
software projects. The following security issues have been discovered
in Bugzilla:

* When abusing the X-FORWARDED-FOR header, an attacker could bypass 
  the lockout policy allowing a possible brute-force discovery of a 
  valid user password.

* An attacker can get access to some bug information using
  the victim's credentials using a specially crafted HTML page.

All affected installations are encouraged to upgrade as soon as

Vulnerability Details

Class:       Unauthorized Access
Versions:    3.5.3 to 3.6.8, 3.7.1 to 4.0.5, 4.1.1 to 4.2
Fixed In:    3.6.9, 4.0.6, 4.2.1
Description: Due to a lack of proper validation of the X-FORWARDED-FOR
             header of an authentication request, an attacker could bypass
             the current lockout policy used for protection against brute-
             force password discovery. This vulnerability can only be 
             exploited if the 'inbound_proxies' parameter is set.
CVE Number:  CVE-2012-0465

Class:       Cross Site Scripting
Versions:    2.17.4 to 3.6.8, 3.7.1 to 4.0.5, 4.1.1 to 4.2
Fixed In:    3.6.9, 4.0.6, 4.2.1
Description: A JavaScript template used by buglist.cgi could be used
             by a malicious script to permit an attacker to gain access
             to some information about bugs he would not normally be
             allowed to see, using the victim's credentials. To be
             exploitable, the victim must be logged in when visiting
             the attacker's malicious page.
CVE Number:  CVE-2012-0466

Vulnerability Solutions

The fixes for these issues are included in the 3.6.9, 4.0.6 and 4.2.1 
releases. Upgrading to a release with the relevant fixes will protect your
installation from possible exploits of these issues.

If you are unable to upgrade but would like to patch just these
individual security vulnerabilities, there are patches available for
the issues at the "References" URL for each vulnerability.

Full release downloads, patches to upgrade Bugzilla from previous
versions, and CVS/bzr upgrade instructions are available at:


The Bugzilla team wish to thank the following people/organizations for
their assistance in locating, advising us of, and assisting us in fixing
these issues:

Frédéric Buclin
Byron Jones
Soroush Dalili

General information about the Bugzilla bug-tracking system can be found

Comments and follow-ups can be directed to the
newsgroup or the support-bugzilla mailing list. has directions for accessing these
forums. is neither affiliated with the authors of this page nor responsible for its contents. This is a safe-cache copy of the original web site.