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Bugzilla Flaws Permit Cross-Site Scripting and Cross-Site Request Forgery Attacks and Let Remote Users Create Acounts
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SecurityTracker Alert ID: 1026480 |
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SecurityTracker URL: http://securitytracker.com/id/1026480
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CVE Reference:
CVE-2011-3657, CVE-2011-3667, CVE-2011-3668, CVE-2011-3669
(Links to External Site)
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Updated: Jan 3 2012
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Original Entry Date: Dec 30 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 3.4.13, 3.6.7, 4.0.3, 4.2rc1
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Description:
Several vulnerabilities were reported in Bugzilla. A remote user can conduct cross-site scripting attacks. A remote user can conduct cross-site request forgery attacks. A remote user can create accounts.
Tabular and graphical reports and new charts do not properly filter HTML code from user-supplied input before displaying the input [CVE-2011-3657]. A remote user can create a specially crafted URL that, when loaded 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.
The 'User.offer_account_by_email' WebService method does not honor the user_can_create_account setting. A remote user can use the token included in the generated email to login to the created account [CVE-2011-3667].
Tabular and graphical reports and new charts do not properly filter HTML code from user-supplied input before displaying the input [CVE-2011-3657]. A remote user can create a specially crafted URL that, when loaded 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.
The bug report creation and attachment functions are not properly validated [CVE-2011-3668, CVE-2011-3669]. A remote user can create specially crafted HTML that, when loaded by a target user, will cause arbitrary scripting code to be executed by the target user's browser. 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.
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Impact:
A remote 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 user can create and access an account on the target system.
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Solution:
The vendor has issued a fix (3.4.13, 3.6.7, 4.0.3, 4.2rc1).
The vendor's advisory is available at:
http://www.bugzilla.org/security/3.4.12/
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Vendor URL: www.bugzilla.org/security/3.4.12/ (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: Thu, 29 Dec 2011 16:36:58 +0000 (GMT)
Subject: Security advisory for Bugzilla 4.2rc1, 4.0.3, 3.6.7 and 3.4.13
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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 viewing tabular or graphical reports as well as new charts,
an XSS vulnerability is possible in debug mode.
* The User.offer_account_by_email WebService method lets you create
a new user account even if the active authentication method forbids
users to create an account.
* A CSRF vulnerability in post_bug.cgi and in attachment.cgi could
lead to the creation of unwanted bug reports and attachments.
All affected installations are encouraged to upgrade as soon as
possible.
Vulnerability Details
=====================
Class: Cross-Site Scripting
Versions: 2.17.1 to 3.4.12, 3.5.1 to 3.6.6, 3.7.1 to 4.0.2,
4.1.1 to 4.1.3
Fixed In: 3.4.13, 3.6.7, 4.0.3, 4.2rc1
Description: Tabular and graphical reports, as well as new charts have
a debug mode which displays raw data as plain text. This
text is not correctly escaped and a crafted URL could
use this vulnerability to inject code leading to XSS.
References: https://bugzilla.mozilla.org/show_bug.cgi?id=697699
CVE Number: CVE-2011-3657
Class: Unauthorized Account Creation
Versions: 2.23.3 to 3.4.12, 3.5.1 to 3.6.6, 3.7.1 to 4.0.2,
4.1.1 to 4.1.3
Fixed In: 3.4.13, 3.6.7, 4.0.3, 4.2rc1
Description: The User.offer_account_by_email WebService method ignores
the user_can_create_account setting of the authentication
method and generates an email with a token in it which the
user can use to create an account. Depending on the
authentication method being active, this could allow the
user to log in using this account.
Installations where the createemailregexp parameter is
empty are not vulnerable to this issue.
References: https://bugzilla.mozilla.org/show_bug.cgi?id=711714
CVE Number: CVE-2011-3667
Class: Cross-Site Request Forgery
Versions: 2.0 to 3.4.12, 3.5.1 to 3.6.6, 3.7.1 to 4.0.2,
4.1.1 to 4.1.3
Fixed In: 4.2rc1
Description: The creation of bug reports and of attachments is not
protected by a token and so they can be created without
the consent of a user if the relevant code is embedded
in an HTML page and the user visits this page. This
behavior was intentional to let third-party applications
submit new bug reports and attachments easily. But as this
behavior can be abused by a malicious user, it has been
decided to block submissions with no valid token starting
from version 4.2rc1. Older branches are not patched to not
break these third-party applications after the upgrade.
References: https://bugzilla.mozilla.org/show_bug.cgi?id=703975
https://bugzilla.mozilla.org/show_bug.cgi?id=703983
CVE Number: none
Vulnerability Solutions
=======================
The fixes for these issues are included in the 3.4.13, 3.6.7, 4.0.3,
and 4.2rc1 releases. Upgrading to a release with the relevant fixes will
protect your installation from possible exploits of these issues.
If you are unable to upgrade but would like to patch just the
individual security vulnerabilities, there are patches available for
each issue at the "References" URL for each vulnerability.
Full release downloads, patches to upgrade Bugzilla from previous
versions, and CVS/bzr upgrade instructions are available at:
http://www.bugzilla.org/download/
Credits
=======
The Bugzilla team wish to thank the following people/organizations for
their assistance in locating, advising us of, and assisting us to fix
this issue:
Byron Jones
Frédéric Buclin
Gervase Markham
David Lawrence
RedTeam Pentesting
Reed Loden
Max Kanat-Alexander
Mario Gomes
General information about the Bugzilla bug-tracking system can be found
at:
http://www.bugzilla.org/
Comments and follow-ups can be directed to the mozilla.support.bugzilla
newsgroup or the support-bugzilla mailing list.
http://www.bugzilla.org/support/ has directions for accessing these
forums.
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