4.1.2, 4.0.1, 3.6.5, and 3.4.11 Security Advisory
Thursday, Aug 4th, 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
Affected: 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
Affected: 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
Affected: 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
Affected: 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
Affected: 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
Affected: 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 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: Neal Poole
Issue 1 Fixed by: Byron Jones, Reed Loden, Max Kanat-Alexander, Frédéric Buclin
Issue 2 Reporter: Frédéric Buclin
Issue 2 Fixed by: Frédéric Buclin, Max Kanat-Alexander, David Lawrence
Issue 3 Reporter: Neil Rashbrook
Issue 3 Fixed by: Frédéric Buclin, Reed Loden, Max Kanat-Alexander, Byron Jones
Issue 4 Reporter: Reed Loden
Issue 4 Fixed by: Byron Jones, Max Kanat-Alexander, Frédéric Buclin
Issue 5 Reporter: Frédéric Buclin
Issue 5 Fixed by: Frédéric Buclin, Byron Jones
Issue 6 Reporter: Max Kanat-Alexander
Issue 6 Fixed by: Max Kanat-Alexander, Frédéric Buclin, Reed Loden
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.
