Date: Fri, 27 May 2005 13:31:30 +0200
From: Thierry Carrez <koon@gentoo.org.>
To: gentoo-announce@lists.gentoo.org
Subject: [ GLSA 200505-20 ] Mailutils: Multiple vulnerabilities in imap4d
and mail
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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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