4.2, 4.0.5, and 3.6.8 Security Advisory

Wednesday, Apr 18th, 2012

Summary
=======

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
possible.


Vulnerability Details
=====================

Class:       Unauthorized Access
Affected:    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.
References:  https://bugzilla.mozilla.org/show_bug.cgi?id=728639
CVE Number:  CVE-2012-0465


Class:       Cross Site Scripting
Affected:    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.
References:  https://bugzilla.mozilla.org/show_bug.cgi?id=745397
CVE Number:  CVE-2012-0466


Vulnerability Solutions
=======================

The fix for these issues is included in the 
releases. Upgrading to a release with the relevant fix will
protect your installation from possible exploits of these issues.

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

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

  https://www.bugzilla.org/download/


Credits
=======

The Bugzilla team wish to thank the following people for their
assistance in locating, advising us of, and assisting us to fix this
issue:


Issue 1 Reporter: Soroush Dalili
Issue 1 Fixed by: Frédéric Buclin, Byron Jones


Issue 2 Reporter: Frédéric Buclin
Issue 2 Fixed by: Frédéric Buclin, Byron Jones

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

  https://www.bugzilla.org/

Comments and follow-ups can be directed to the support-bugzilla mailing list.
https://www.bugzilla.org/support/ has directions for accessing this forum.