SqWebMail Bug in Filtering IMG Tags Lets Remote Users Inject Arbitrary Scripting Code
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SecurityTracker Alert ID: 1014810
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SecurityTracker URL: http://securitytracker.com/id?1014810
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CVE Reference: CAN-2005-2724
(Links to External Site)
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Updated: Sep 2 2005
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Original Entry Date: Aug 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
Exploit Included: Yes
Vendor Confirmed: Yes
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Advisory: Secunia Research
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Version(s): 5.0.4
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Description: A vulnerability was reported in SqWebMail. A remote user can cause arbitrary scripting code to be executed on the target user's system.
The software does not properly filter HTML code in e-mail messages. A remote user can send an HTML-based e-mail message containing
arbitrary scripting code. When the target user views the message, the scripting code will be executed by the target user's browser.
The code will originate from the site running the SqWebMail 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
demonstration exploit example is provided:
<img src="cid:>" onError="alert(document.domain);">
The vendor was notified on
August 26, 2005.
Jakob Balle of Secunia Research discovered this vulnerability.
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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
SqWebMail 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 development snapshot version (5.0.4.20050826), available at:
http://www.courier-mta.org/?download.php
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Vendor URL: www.courier-mta.org/sqwebmail/ (Links to External Site)
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Cause: Input validation error
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Underlying OS: Linux (Any), UNIX (Any)
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Reported By: Secunia Research <vuln@secunia.com>
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Message History:
None.
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Source Message Contents
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Date: Mon, 29 Aug 2005 12:33:59 +0200
From: Secunia Research <vuln@secunia.com>
Subject: [Full-disclosure] Secunia Research: SqWebMail HTML Emails Script
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======================================================================
Secunia Research 29/08/2005
- SqWebMail HTML Emails Script Insertion Vulnerability -
======================================================================
Table of Contents
Affected Software....................................................1
Severity.............................................................2
Description of Vulnerability.........................................3
Solution.............................................................4
Time Table...........................................................5
Credits..............................................................6
References...........................................................7
About Secunia........................................................8
Verification.........................................................9
======================================================================
1) Affected Software
SqWebMail 5.0.4
Other versions may also be affected.
======================================================================
2) Severity
Rating: Moderately Critical
Impact: Script Insertion
Where: From Remote
======================================================================
3) Description of Vulnerability
Secunia Research has discovered a vulnerability in SqWebMail, which
can be exploited by malicious people to conduct script insertion
attacks.
The vulnerability is caused due to SqWebMail failing to properly
sanitise HTML emails. This can be exploited to include arbitrary
script code in HTML emails, which will be executed in context of the
SqWebMail server, as soon as the user views a received email.
Example:
<img src="cid:>" onError="alert(document.domain);">
Successful exploitation allows execution of arbitrary script code
and makes it possible for a malicious person to perform the same
actions as the user of the webmail account (e.g. sending or viewing
emails).
======================================================================
4) Solution
The vendor has issued an updated version of SqWebMail, which fixes
this vulnerability.
http://www.courier-mta.org/?download.php
======================================================================
5) Time Table
26/08/2005 - Initial vendor notification.
26/08/2005 - Vendor confirms vulnerability and releases a fix.
29/08/2005 - Public disclosure.
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6) Credits
Discovered by Jakob Balle, Secunia Research.
======================================================================
7) References
No references available.
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8) About Secunia
Secunia collects, validates, assesses, and writes advisories regarding
all the latest software vulnerabilities disclosed to the public. These
advisories are gathered in a publicly available database at the
Secunia website:
http://secunia.com/
Secunia offers services to our customers enabling them to receive all
relevant vulnerability information to their specific system
configuration.
Secunia offers a FREE mailing list called Secunia Security Advisories:
http://secunia.com/secunia_security_advisories/
======================================================================
9) Verification
Please verify this advisory by visiting the Secunia website:
http://secunia.com/secunia_research/2005-39/advisory/
Complete list of vulnerability reports published by Secunia Research:
http://secunia.com/secunia_research/
======================================================================
_______________________________________________
Full-Disclosure - We believe in it.
Charter: http://lists.grok.org.uk/full-disclosure-charter.html
Hosted and sponsored by Secunia - http://secunia.com/
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