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Gentoo Linux Security Advisory                           GLSA 200502-29
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: Cyrus IMAP Server: Multiple overflow vulnerabilities
      Date: February 23, 2005
      Bugs: #82404
        ID: 200502-29

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Synopsis
========

The Cyrus IMAP Server is affected by several overflow vulnerabilities
which could potentially lead to the remote execution of arbitrary
code.

Background
==========

The Cyrus IMAP Server is an efficient, highly-scalable IMAP e-mail
server.

Affected packages
=================

    -------------------------------------------------------------------
     Package               /  Vulnerable  /                 Unaffected
    -------------------------------------------------------------------
  1  net-mail/cyrus-imapd      < 2.2.12                      >= 2.2.12

Description
===========

Possible single byte overflows have been found in the imapd annotate
extension and mailbox handling code. Furthermore stack buffer overflows
have been found in fetchnews, the backend and imapd.

Impact
======

An attacker, who could be an authenticated user or an admin of a
peering news server, could exploit these vulnerabilities to execute
arbitrary code with the rights of the user running the Cyrus IMAP
Server.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All Cyrus IMAP Server users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=net-mail/cyrus-imapd-2.2.12"

References
==========

  [ 1 ] Cyrus IMAP Announcement
        http://asg.web.cmu.edu/archive/message.php?mailbox=archive.info-cyrus&msg=33723

Availability
============

This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

  http://security.gentoo.org/glsa/glsa-200502-29.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