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HistoryApr 23, 2007 - 12:00 a.m.

[Full-disclosure] [ GLSA 200704-18 ] Courier-IMAP: Remote execution of arbitrary code

2007-04-2300:00:00
vulners.com
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Gentoo Linux Security Advisory GLSA 200704-18


                                        http://security.gentoo.org/

Severity: High
Title: Courier-IMAP: Remote execution of arbitrary code
Date: April 22, 2007
Bugs: #168196
ID: 200704-18


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

-------------------------------------------------------------------
 Package                /  Vulnerable  /                Unaffected
-------------------------------------------------------------------

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 &quot;&gt;=net-mail/courier-imap-4.0.6-r2&quot;

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
[email protected] 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