Security advisory for Bugzilla 4.2.1, 4.0.6 and 3.6.9

[Frédéric Buclin]

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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
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.
References:  https://bugzilla.mozilla.org/show_bug.cgi?id=728639
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.
References:  https://bugzilla.mozilla.org/show_bug.cgi?id=745397
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:

  http://www.bugzilla.org/download/


Credits
=======

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
at:

  http://www.bugzilla.org/

Comments and follow-ups can be directed to the mozilla.support.bugzilla
newsgroup or the support-bugzilla mailing list.
http://www.bugzilla.org/support/ has directions for accessing these
forums.
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