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Category:   Application (Generic)  >   Bugzilla Vendors:   Mozilla.org
Bugzilla Permits Cross-Site Scripting and Information Disclosure Attacks
SecurityTracker Alert ID:  1025888
SecurityTracker URL:  http://securitytracker.com/id/1025888
CVE Reference:   CVE-2011-2379, CVE-2011-2380, CVE-2011-2979, CVE-2011-2381, CVE-2011-2978, CVE-2011-2977, CVE-2011-2976   (Links to External Site)
Date:  Aug 5 2011
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): prior to versions 3.4.12, 3.6.6, 4.0.2, 4.1.3
Description:   Several vulnerabilities were reported in Bugzilla. A remote authenticated user can conduct cross-site scripting attacks. A remote authenticated user can inject e-mail headers. A remote authenticated user can determine group names. A local user can view uploaded attachments.

A specially crafted patch can be used to conduct cross-site scripting attacks when viewed in "Raw Unified" mode in some older browsers that perform content sniffing to determine rendering mode [CVE-2011-2379]. A remote authenticated user can create a specially crafted patch that, when viewed by a target user, will 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 authenticated user can create a specially crafted URL when creating or editing a bug or use a custom search to determine if a group exists [CVE-2011-2979, CVE-2011-2380].

A remote user can use a specially crafted attachment description containing a newline to inject headers into flagmails [CVE-2011-2381]. bugmails are not affected.

A user with access to a target user's valid session can change the destination e-mail address used by the system for the target user's account to send confirmation messages [CVE-2011-2978].

A local user can access temporary files used for uploaded attachments [CVE-2011-2977].

A remote user that can modify a BUGLIST cookie (via an external vulnerability) can inject HTML code to be displayed when a bug report is displayed, permitting cross-site scripting attacks [CVE-2011-2976].

Frederic Buclin, Byron Jones, Max Kanat-Alexander, Reed Loden, Neal Poole, Neil Rashbrook, and David Lawrence reported these vulnerabilities.

Impact:   A remote authenticated 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 authenticated user can inject e-mail headers.

A remote authenticated user can determine group names.

A local user can view uploaded attachments.

Solution:   The vendor has issued a fix (3.4.12, 3.6.6, 4.0.2, 4.1.3).

The vendor's advisory is available at:

http://www.bugzilla.org/security/3.4.11/

Vendor URL:  www.bugzilla.org/security/3.4.11/ (Links to External Site)
Cause:   Access control error, Input validation error
Underlying OS:   Linux (Any), UNIX (Any)

Message History:   None.


 Source Message Contents

Date:  Fri, 05 Aug 2011 17:07:11 +0000
Subject:  Bugzilla


http://www.bugzilla.org/security/3.4.11/

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

 
 


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