[ GLSA 200911-03 ] UW IMAP toolkit: Multiple vulnerabilities

[Robert Buchholz <rbu () gentoo org>]

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Gentoo Linux Security Advisory                           GLSA 200911-03
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                                            http://security.gentoo.org/
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  Severity: High
     Title: UW IMAP toolkit: Multiple vulnerabilities
      Date: November 25, 2009
      Bugs: #245425, #252567
        ID: 200911-03

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Synopsis
========

Multiple vulnerabilities have been found in the UW IMAP toolkit and the
c-client library, the worst of which leading to the execution of
arbitrary code.

Background
==========

The UW IMAP toolkit is a daemon for the IMAP and POP3 network mail
protocols. The c-client library provides an API for IMAP, POP3 and
other protocols.

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

    -------------------------------------------------------------------
     Package            /  Vulnerable  /                    Unaffected
    -------------------------------------------------------------------
  1  net-libs/c-client       < 2007e                          >= 2007e
  2  net-mail/uw-imap        < 2007e                          >= 2007e
    -------------------------------------------------------------------
     2 affected packages on all of their supported architectures.
    -------------------------------------------------------------------

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

Multiple vulnerabilities were found in the UW IMAP toolkit:

* Aron Andersson and Jan Sahlin of Bitsec reported boundary errors in
  the "tmail" and "dmail" utilities when processing overly long mailbox
  names, leading to stack-based buffer overflows (CVE-2008-5005).

* An error in smtp.c in the c-client library was found, leading to a
  NULL pointer dereference vulnerability (CVE-2008-5006).

* Ludwig Nussel reported an off-by-one error in the
  rfc822_output_char() function in the RFC822BUFFER routines in the
  c-client library, as used by the UW IMAP toolkit (CVE-2008-5514).

Impact
======

A remote attacker could send an e-mail to a destination mailbox name
composed of a username and '+' character followed by a long string,
possibly leading to the execution of arbitrary code. A local attacker
could gain privileges by specifying a long folder extension argument to
the tmail or dmail program. Furthermore, a remote attacker could send a
specially crafted mail message to the UW IMAP toolkit or another daemon
using the c-client library, leading to a Denial of Service. A remote
SMTP server could respond to the QUIT command with a close of the TCP
connection instead of the expected 221 response code, possibly leading
to a Denial of Service.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All c-client library users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=net-libs/c-client-2007e"

All UW IMAP toolkit users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=net-mail/uw-imap-2007e"

References
==========

  [ 1 ] CVE-2008-5005
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-5005
  [ 2 ] CVE-2008-5006
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-5006
  [ 3 ] CVE-2008-5514
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-5514

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

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

  http://security.gentoo.org/glsa/glsa-200911-03.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
https://bugs.gentoo.org.

License
=======

Copyright 2009 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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