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Category:   Application (Generic)  >   Bugzilla Vendors:   Mozilla.org
Bugzilla Permits Cross-Site Scripting and HTTP Response Splitting Attacks and Discloses Certain Information to Remote Users
SecurityTracker Alert ID:  1024683
SecurityTracker URL:  http://securitytracker.com/id/1024683
CVE Reference:   CVE-2010-3172, CVE-2010-3764   (Links to External Site)
Date:  Nov 4 2010
Impact:   Disclosure of authentication information, Disclosure of system information, Disclosure of user information, Execution of arbitrary code via network, Modification of user information
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): Versions prior to 3.2.9, 3.4.9, 3.6.3, 4.0rc1
Description:   Several vulnerabilities were reported in Bugzilla. A remote user can conduct cross-site scripting attacks. A remote user can conduct HTTP response splitting attacks. A remote user can view graphs from Old Charts.

The YUI library component (v2.8.1) does not properly filter HTML code from '.swf' files. A remote user can cause arbitrary scripting code to be executed by the target user's browser. The code will originate from the site running the Bugzilla software and will run in the security context of that site. As a result, the code will be able to access the target user's cookies (including authentication cookies), if any, associated with the site, access data recently submitted by the target user via web form to the site, or take actions on the site acting as the target user.

A remote user can submit a specially crafted URL to cause the target server to return a split response [CVE-2010-3172]. A remote user can exploit this to spoof content on the target server, attempt to poison any intermediate web caches, or conduct cross-site scripting attacks against browsers that support "Server Push".

A remote user can supply a specially crafted URL to browse graphs generated by the Old Charts system [CVE-2010-3764]. This can be exploited to see product names and charted information about those products.

Impact:   A remote user can access the target user's cookies (including authentication cookies), if any, associated with the site running the Bugzilla software, access data recently submitted by the target user via web form to the site, or take actions on the site acting as the target user.

A remote user can create a URL that, when loaded by the target user, will cause arbitrary content to be displayed.

A remote user may be able to poison any intermediate web caches with arbitrary content.

A remote user can view graphs from Old Charts.

Solution:   The vendor has issued a fix (3.2.9, 3.4.9, 3.6.3, 4.0rc1).

The vendor's advisory is available at:

http://www.bugzilla.org/security/3.2.8/

Vendor URL:  www.bugzilla.org/security/3.2.8/ (Links to External Site)
Cause:   Access control error, Input validation error
Underlying OS:  Linux (Any), UNIX (Any)

Message History:   None.


 Source Message Contents

Subject:  Security Advisory for Bugzilla 3.2.8, 3.4.8, 3.6.2, and 3.7.3

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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:

* There is a way to inject both headers and content to users, causing
  a serious Cross-Site Scripting vulnerability.

* It was possible to see graphs from Old Charts even if you did not
  have access to a particular product, and you could browse a
  particular URL to see all product names.

* YUI 2.8.1, which shipped with Bugzilla starting with 3.7.x,
  contained a security vulnerability. The version of YUI shipped
  with Bugzilla 4.0rc1 and above has been updated to 2.8.2.

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

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

Class:       HTTP Response Splitting
Versions:    Every Version Before 3.2.9, 3.4.9, 3.6.3, 4.0rc1
Fixed In:    3.2.9, 3.4.9, 3.6.3, 4.0rc1
Description: By inserting a certain string into a URL, it was possible
             to inject both headers and content to any browser that
             supported "Server Push" (mostly only Gecko-based browsers
             like Firefox). This could lead to Cross-Site Scripting
             vulnerabilities, and possibly other more dangerous
             security issues as well.
References:  https://bugzilla.mozilla.org/show_bug.cgi?id=600464
             http://cwe.mitre.org/data/definitions/113.html
CVE Number:  CVE-2010-3172

Class:       Information Leak
Versions:    2.12 to 3.2.8, 3.4.8, 3.6.2, 3.7.3, 4.1
Fixed In:    3.2.9, 3.4.9, 3.6.3, 4.0rc1
Description: The Old Charts system generated graphs with
             predictable names into the "graphs/" directory,
             which also could be browsed to see its contents.
             This allowed unauthorized users to see product names
             and charted information about those products over time.
References:  https://bugzilla.mozilla.org/show_bug.cgi?id=419014
CVE Number:  CVE-2010-3764

Class:       Cross-Site Scripting
Versions:    3.7.1 to 3.7.3, 4.1
Fixed In:    4.0rc1
Description: YUI 2.8.1 was vulnerable to a Cross-Site Scripting
             vulnerability in certain .swf files. The YUI shipped
             with Bugzilla has been updated to 2.8.2.
References:  https://bugzilla.mozilla.org/show_bug.cgi?id=606618
             http://secunia.com/advisories/41955
             http://yuilibrary.com/support/2.8.2/

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

The fixes for these issues are included in the 3.2.9, 3.4.9, 3.6.3, and
4.0rc1 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 bugzilla.mozilla.org "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
Marc Schumann
Michael Coates
Philip Gillissen
Masahiro Yamada

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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Comment: Using GnuPG with Fedora - http://enigmail.mozdev.org/

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