4.1.2, 4.0.1, 3.6.5, and 3.4.11 Security Advisory

Tuesday, August 4, 2011
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:

* Internet Explorer 8 and older, and Safari before 5.0.6 do content
  sniffing when viewing a patch in "Raw Unified" mode, which could
  trigger a cross-site scripting attack due to the execution of
  malicious code in the attachment.

* It is possible to determine whether or not certain group names exist
  while creating or updating bugs; and in Bugzilla 4.1.1 and 4.1.2,
  also by using custom searches.

* Attachment descriptions with a newline in them could lead to the
  injection of crafted headers in email notifications sent to the
  requestee or the requester when editing an attachment flag.

* If an attacker has access to a user's session, he can modify that
  user's email address without that user being notified of the change.

* Temporary files for uploaded attachments are not deleted on Windows,
  which could let a user with local access to the server read them.

* Up to Bugzilla 3.4.11, if a BUGLIST cookie is compromised, it can
  be used to inject HTML code when viewing a bug report, leading to
  a cross-site scripting attack.

All affected installations are encouraged to upgrade as soon as
possible.


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

Class:       Cross-Site Scripting
Versions:    2.4 to 3.4.11, 3.5.1 to 3.6.5, 3.7.1 to 4.0.1,
             4.1.1 to 4.1.2
Fixed In:    3.4.12, 3.6.6, 4.0.2, 4.1.3
Description: Bugzilla uses an alternate host for attachments when
             viewing them in raw format to prevent cross-site scripting
             attacks. This alternate host is now also used when viewing
             patches in "Raw Unified" mode because Internet Explorer 8
             and older, and Safari before 5.0.6 do content sniffing,
             which could lead to the execution of malicious code.
References:  https://bugzilla.mozilla.org/show_bug.cgi?id=637981
CVE Number:  CVE-2011-2379

Class:       Information Leak
Versions:    2.23.3 to 3.4.11, 3.5.1 to 3.6.5, 3.7.1 to 4.0.1,
             4.1.1 to 4.1.2
Fixed In:    3.4.12, 3.6.6, 4.0.2, 4.1.3
Description: Normally, a group name is confidential and is only visible
             to members of the group, and to non-members if the group
             is used in bugs. By crafting the URL when creating or
             editing a bug, it was possible to guess if a group existed
             or not, even for groups which weren't used in bugs and so
             which were supposed to remain confidential.
             Moreover, in Bugzilla 4.1.1 and 4.1.2, custom searches also
             let you determine if a group exists or not, even for groups
             which should remain confidential.
References:  https://bugzilla.mozilla.org/show_bug.cgi?id=653477
             https://bugzilla.mozilla.org/show_bug.cgi?id=674497
CVE Number:  CVE-2011-2380, CVE-2011-2979

Class:       Email Header Injection
Versions:    2.17.1 to 3.4.11, 3.5.1 to 3.6.5, 3.7.1 to 4.0.1,
             4.1.1 to 4.1.2
Fixed In:    3.4.12, 3.6.6, 4.0.2, 4.1.3
Description: Bugzilla mostly sends two types of email notifications:
             bugmails and flagmails. A bugmail is the standard email
             users get when a change is made to a bug. A flagmail is
             only sent to the requestee or requester of a flag. For
             flagmails only, attachment descriptions with a newline
             in them could lead to the injection of crafted headers in
             email notifications when an attachment flag is edited.
             Other users only receiving a bugmail are not affected.
References:  https://bugzilla.mozilla.org/show_bug.cgi?id=657158
CVE Number:  CVE-2011-2381

Class:       Unnotified Account Change
Versions:    2.16rc1 to 3.4.11, 3.5.1 to 3.6.5, 3.7.1 to 4.0.1,
             4.1.1 to 4.1.2
Fixed In:    3.4.12, 3.6.6, 4.0.2, 4.1.3
Description: When a user changes his email address, Bugzilla trusts
             a user-modifiable field for obtaining the current e-mail
             address to send a confirmation message to. If an attacker
             has access to the session of another user (for example,
             if that user left their browser window open in a public
             place), the attacker could alter this field to cause
             the email-change notification to go to their own address.
             This means that the user would not be notified that his
             account had its email address changed by the attacker.
References:  https://bugzilla.mozilla.org/show_bug.cgi?id=670868
CVE Number:  CVE-2011-2978

Class:       Local Information Disclosure
Versions:    3.6 to 3.6.5, 3.7.1 to 4.0.1, 4.1.1 to 4.1.2
Fixed In:    3.6.6, 4.0.2, 4.1.3
Description: Temporary files for uploaded attachments are not deleted
             on Windows. A user with local access to the server could
             read these attachments even if he wouldn't normally be
             allowed to view them from Bugzilla.
References:  https://bugzilla.mozilla.org/show_bug.cgi?id=660502
CVE Number:  CVE-2011-2977

Class:       Cross-Site Scripting
Versions:    2.16rc1 to 3.4.11
Fixed In:    3.4.12
Description: If a BUGLIST cookie is compromised (which is not possible
             except via a vulnerability outside of Bugzilla), it can be
             used to inject HTML code when viewing a bug report, leading
             to a cross-site scripting attack.
             Bugzilla 3.5.1 and above are not affected by this issue.
References:  https://bugzilla.mozilla.org/show_bug.cgi?id=660053
CVE Number:  CVE-2011-2976


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

The fixes for these issues are included in the 3.4.12, 3.6.6, 4.0.2,
and 4.1.3 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 the
individual security vulnerabilities, there are patches available for
each issue 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 to fix
this issue:

Frédéric Buclin
Byron Jones
Max Kanat-Alexander
Reed Loden
Neal Poole
Neil Rashbrook
David Lawrence

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.