4.2.rc1, 4.0.3, 3.6.7, and 3.4.13 Security Advisory

Tuesday, Jan 31st, 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 a user creates a new account, Bugzilla doesn't correctly
  reject email addresses containing non-ASCII characters, which
  could be used to impersonate another user account.

* A CSRF vulnerability in the implementation of the JSON-RPC API
  could be used to make changes to bugs or execute some admin tasks
  without the victim's knowledge.

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


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

Class:       Account Impersonation
Affected:    2.0 to 3.4.13, 3.5.1 to 3.6.7, 3.7.1 to 4.0.3, 4.1.1 to 4.2rc1
Fixed In:    3.4.14, 3.6.8, 4.0.4, 4.2rc2
Description: When a user creates a new account, Bugzilla doesn't
             correctly reject email addresses containing non-ASCII
             characters, which could be used to impersonate another
             user account. Such email addresses could look visually
             identical to other valid email addresses, and an attacker
             could try to confuse other users and be added to bugs he
             shouldn't have access to.
References:  https://bugzilla.mozilla.org/show_bug.cgi?id=714472
CVE Number:  CVE-2012-0448


Class:       Cross-Site Request Forgery
Affected:    3.5.1 to 3.6.7, 3.7.1 to 4.0.3, 4.1.1 to 4.2rc1
Fixed In:    3.6.8, 4.0.4, 4.2rc2
Description: Due to a lack of validation of the Content-Type header
             when making POST requests to jsonrpc.cgi, a possible
             CSRF vulnerability was discovered. If a user visits an
             HTML page with some malicious JS code in it, an attacker
             could make changes to a remote Bugzilla installation on
             behalf of the victim's account by using the JSON-RPC API.
             The user would have had to be already logged in to the
             target site for the vulnerability to work.
References:  https://bugzilla.mozilla.org/show_bug.cgi?id=718319
CVE Number:  CVE-2012-0440


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: James Kettle
Issue 1 Fixed by: Frédéric Buclin, Byron Jones, Max Kanat-Alexander


Issue 2 Reporter: Mario Gomes
Issue 2 Fixed by: Frédéric Buclin, Max Kanat-Alexander

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.