2.20.4, 2.22.2, and 3.0 Security Advisory

Thursday, Aug 23rd, 2007

Bugzilla is a Web-based bug-tracking system used by a large number of
software projects. The following security issue has been discovered
in Bugzilla:

* A possible cross-site scripting (XSS) vulnerability when filing bugs
using the guided form.

* When using email_in.pl, insufficiently escaped data may be passed to

* Users using the WebService interface may access Bugzilla's time-tracking
fields even if they normally cannot see them.

All affected installations are encouraged to upgrade as soon as

Vulnerability Details

Class:       Cross-Site Scripting
Versions:    2.17.1 and above

Description: Bugzilla does not properly escape the 'buildid' field in
the guided form when filing bugs. From 2.17.1 till 2.23.3,
this field was based exclusively on the User-Agent string
returned by your web browser. Since 2.23.4, this parameter
can be defined in the URL passed to enter_bug.cgi, overwriting
the User-Agent string and may lead to cross-site scripting.
The guided form is not usually used by Bugzilla installations,
as it is shipped only as an example to be modified for their
own use.

Class:       Command Injection
Versions:    2.23.4 and above

Description: Bugzilla 2.23.4 and newer use the Email:: modules instead
of the Mail:: and MIME:: ones. The argument passed to the -f
option of Email::Send::Sendmail() is insufficiently escaped
and may lead to limited command injection when called from
email_in.pl, a script which was also introduced in 2.23.4.

Class:       Information Leak
Versions:    2.23.3 and above

Description: Bugzilla's WebService (XML-RPC) interface allows you to access
the time-tracking fields (such as Deadline, Estimated Time, etc.)
on all bugs, even if you normally cannot access time-tracking

Vulnerability Solutions

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

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

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



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

Issue 1 Reporter: Masahiro Yamada
Issue 1 Fixed by: Frédéric Buclin

Issue 2 Reporter: Loïc Minier
Issue 2 Fixed by: Loïc Minier, Max Kanat-Alexander, Frédéric Buclin

Issue 3 Reporter: Frédéric Buclin
Issue 3 Fixed by: Frédéric Buclin, Max Kanat-Alexander

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


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