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Gentoo Linux Security Advisory GLSA 200501-39
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http://security.gentoo.org/
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Severity: High
Title: SquirrelMail: Multiple vulnerabilities
Date: January 28, 2005
Bugs: #78116
ID: 200501-39
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Synopsis
========
SquirrelMail fails to properly sanitize user input, which could lead to
arbitrary code execution and compromise webmail accounts.
Background
==========
SquirrelMail is a webmail package written in PHP. It supports IMAP and
SMTP and can optionally be installed with SQL support.
Affected packages
=================
-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 mail-client/squirrelmail <= 1.4.3a-r2 >= 1.4.4
Description
===========
SquirrelMail fails to properly sanitize certain strings when decoding
specially-crafted strings, which can lead to PHP file inclusion and
XSS.
* Insufficient checking of incoming URLs in prefs.php (CAN-2005-0075)
and in webmail.php (CAN-2005-0103).
* Insufficient escaping of integers in webmail.php (CAN-2005-0104).
Impact
======
By sending a specially-crafted URL, an attacker can execute arbitrary
code from the local system with the permissions of the web server.
Furthermore by enticing a user to load a specially-crafted URL, it is
possible to display arbitrary remote web pages in Squirrelmail's
frameset and execute arbitrary scripts running in the context of the
victim's browser. This could lead to a compromise of the user's webmail
account, cookie theft, etc.
Workaround
==========
The arbitrary code execution is only possible with "register_globals"
set to "On". Gentoo ships PHP with "register_globals" set to "Off" by
default. There are no known workarounds for the other issues at this
time.
Resolution
==========
All SquirrelMail users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=mail-client/squirrelmail-1.4.4"
Note: Users with the vhosts USE flag set should manually use
webapp-config to finalize the update.
References
==========
[ 1 ] SquirrelMail Advisory
http://sourceforge.net/mailarchive/message.php?msg_id=10628451
[ 2 ] CAN-2005-0075
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0075
[ 3 ] CAN-2005-0103
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0103
[ 4 ] CAN-2005-0104
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0104
Availability
============
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
http://security.gentoo.org/glsa/glsa-200501-39.xml
Concerns?
=========
Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users machines is of utmost
importance to us. Any security concerns should be addressed to
security@gentoo.org or alternatively, you may file a bug at
http://bugs.gentoo.org.
License
=======
Copyright 2005 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).
The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.
http://creativecommons.org/licenses/by-sa/2.0
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