[ GLSA 200505-20 ] Mailutils: Multiple vulnerabilities in imap4d and mail

[Thierry Carrez <koon () gentoo org>]

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Gentoo Linux Security Advisory                           GLSA 200505-20
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                                            http://security.gentoo.org/
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  Severity: High
     Title: Mailutils: Multiple vulnerabilities in imap4d and mail
      Date: May 27, 2005
      Bugs: #94053
        ID: 200505-20

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Synopsis
========

The imap4d server and the mail utility from GNU Mailutils contain
multiple vulnerabilities, potentially allowing a remote attacker to
execute arbitrary code with root privileges.

Background
==========

GNU Mailutils is a collection of mail-related utilities, including an
IMAP4 server (imap4d) and a Mail User Agent (mail).

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

    -------------------------------------------------------------------
     Package             /  Vulnerable  /                   Unaffected
    -------------------------------------------------------------------
  1  net-mail/mailutils      < 0.6-r1                        >= 0.6-r1

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

infamous41d discovered several vulnerabilities in GNU Mailutils. imap4d
does not correctly implement formatted printing of command tags
(CAN-2005-1523), fails to validate the range sequence of the "FETCH"
command (CAN-2005-1522), and contains an integer overflow in the
"fetch_io" routine (CAN-2005-1521). mail contains a buffer overflow in
"header_get_field_name()" (CAN-2005-1520).

Impact
======

A remote attacker can exploit the format string and integer overflow in
imap4d to execute arbitrary code as the imap4d user, which is usually
root. By sending a specially crafted email message, a remote attacker
could exploit the buffer overflow in the "mail" utility to execute
arbitrary code with the rights of the user running mail. Finally, a
remote attacker can also trigger a Denial of Service by sending a
malicious FETCH command to an affected imap4d, causing excessive
resource consumption.

Workaround
==========

There are no known workarounds at this time.

Resolution
==========

All GNU Mailutils users should upgrade to the latest available version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=net-mail/mailutils-0.6-r1"

References
==========

  [ 1 ] CAN-2005-1520
        http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-1520
  [ 2 ] CAN-2005-1521
        http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-1521
  [ 3 ] CAN-2005-1522
        http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-1522
  [ 4 ] CAN-2005-1523
        http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-1523
  [ 5 ] iDEFENSE 05.25.05 advisories

http://www.idefense.com/application/poi/display?type=vulnerabilities&showYear=2005

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

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

  http://security.gentoo.org/glsa/glsa-200505-20.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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