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Gentoo Linux Security Advisory GLSA 200704-18
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http://security.gentoo.org/
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Severity: High
Title: Courier-IMAP: Remote execution of arbitrary code
Date: April 22, 2007
Bugs: #168196
ID: 200704-18
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Synopsis
========
A vulnerability has been discovered in Courier-IMAP allowing for remote
code execution with root privileges.
Background
==========
Courier-IMAP is an IMAP server which is part of the Courier mail
system. It provides access only to maildirs.
Affected packages
=================
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Package / Vulnerable / Unaffected
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1 net-mail/courier-imap < 4.0.6-r2 >= 4.0.6-r2
Description
===========
CJ Kucera has discovered that some Courier-IMAP scripts don't properly
handle the XMAILDIR variable, allowing for shell command injection.
Impact
======
A remote attacker could send specially crafted login credentials to a
Courier-IMAP server instance, possibly leading to remote code execution
with root privileges.
Workaround
==========
There is no known workaround at this time.
Resolution
==========
All Courier-IMAP users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=net-mail/courier-imap-4.0.6-r2"
Availability
============
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
http://security.gentoo.org/glsa/glsa-200704-18.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@xxxxxxxxxx or alternatively, you may file a bug at
http://bugs.gentoo.org.
License
=======
Copyright 2007 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/2.5
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