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Bugzilla Permits Cross-Site Scripting and Information Disclosure Attacks
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SecurityTracker Alert ID: 1025888 |
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SecurityTracker URL: http://securitytracker.com/id/1025888
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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)
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Date: Aug 5 2011
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Impact:
Disclosure of authentication information, Disclosure of system information, Disclosure of user information, Execution of arbitrary code via network, Modification of user information
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Fix Available: Yes Vendor Confirmed: Yes
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Version(s): prior to versions 3.4.12, 3.6.6, 4.0.2, 4.1.3
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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.
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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.
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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/
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Vendor URL: www.bugzilla.org/security/3.4.11/ (Links to External Site)
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Cause:
Access control error, Input validation error
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Underlying OS:
Linux (Any), UNIX (Any)
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Message History:
None.
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Source Message Contents
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Date: Fri, 05 Aug 2011 17:07:11 +0000
Subject: Bugzilla
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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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