SquirrelMail 'Address Add' Plugin Input Validation Holes Permit Cross-Site Scripting Attacks
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SecurityTracker Alert ID: 1014988
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SecurityTracker URL: http://securitytracker.com/id?1014988
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CVE Reference: CVE-2005-3128
(Links to External Site)
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Updated: Jun 15 2008
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Original Entry Date: Sep 29 2005
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Impact: Disclosure of authentication 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 2.1
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Description: A vulnerability was reported in the 'Address Add' plugin for SquirrelMail. A remote user can conduct cross-site scripting attacks.
The plugin does not properly filter HTML code from user-supplied input before displaying the input. A remote user can send a specially
crafted email that, when processed 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 SquirrelMail plugin 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 demonstration exploit URL is provided:
/squirrelmail_root_dir/plugins/address_add/add.php?first=HOVER%20ME!%22%20onMouseOver=%22alert('foo');
The
'first' parameter and other parameters are affected.
The vendor was notified on September 24, 2005.
Moritz Naumann IT Consulting
& Services reported this vulnerability.
The original advisory is available at:
http://moritz-naumann.com/adv/0002/sqmadd/0002.txt
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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
SquirrelMail plugin 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.
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Solution: The vendor has issued a fixed version of the plugin (2.1), available at:
http://sqmail.org
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Vendor URL: www.sqmail.org/ (Links to External Site)
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Cause: Input validation error
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Underlying OS: Linux (Any), UNIX (Any), Windows (Any)
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Reported By: Moritz Naumann <info@moritz-naumann.com>
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Message History:
None.
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Source Message Contents
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Date: Thu, 29 Sep 2005 00:45:24 +0200
From: Moritz Naumann <info@moritz-naumann.com>
Subject: [Full-disclosure] SquirrelMail Address Add Plugin XSS
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-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
SA0002
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+++++ SquirrelMail Address Add Plugin XSS +++++
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
PUBLISHED ON
Sep 28, 2005
PUBLISHED AT
http://moritz-naumann.com/adv/0002/sqmadd/0002.txt
PUBLISHED BY
Moritz Naumann IT Consulting & Services
Hamburg/Germany
http://moritz-naumann.com/
info AT moritz HYPHON naumann D0T com
GPG key: http://moritz-naumann.com/keys/0x277F060C.asc
AFFECTED PRODUCT OR SERVICE
Address Add Plugin for Squirrelmail >= v1.4.0
by Jimmy Conner
http://sqmail.org/
AFFECTED VERSION
Address Add Plugin Versions 1.9 and 2.0
Possibly versions < 1.9 (untested)
BACKGROUND
Everybody knows XSS.
http://en.wikipedia.org/wiki/XSS
http://www.cgisecurity.net/articles/xss-faq.shtml
ISSUE
A XSS vulnerability has been detected in the Address Add Plugin for
Squirrelmail. The problem is caused by insufficient input sanitation.
Sending a HTML email containing an IMG tag which provides a SRC
attribute pointing at the vulnerable plugin may allow an attacker to
retrieve the victims' cookie and session information without the
victim being aware. The exploit may be triggered when the victim
clicks on a specially crafted URL contained in the email and hovers
the address book form field.
The following partial URL demonstrates the issue:
/squirrelmail_root_dir/plugins/address_add/add.php?first=HOVER%20ME!%22%20onMouseOver=%22alert('foo')
;
Please move your mouse pointer over the input field which says so.
Other variables on this script can be misused in the same way.
WORKAROUND
Disable Javascript or disable plugin.
SOLUTIONS
Version 2.1 of the plugin fixes the issue. The update is available on
boths the developers' website at
http://sqmail.org
and on the SquirrelMail website at
http://squirrelmail.org/plugin_view.php?id=101
TIMELINE
Sep 24, 2005: Maintainer informed
Sep 25, 2005: First maintainer reply
Sep 25, 2005: Maintainer provides fix
Sep 29, 2005: Public disclosure
CREDIT
N/A
LICENSE
Creative Commons Attribution-ShareAlike License Germany
http://creativecommons.org/licenses/by-sa/2.0/de/
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