[ GLSA 200404-18 ] Multiple Vulnerabilities in ssmtp

["Joshua J. Berry" <condordes () gentoo org>]

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Gentoo Linux Security Advisory                           GLSA 200404-18
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                                            http://security.gentoo.org/
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  Severity: High
     Title: Multiple Vulnerabilities in ssmtp
      Date: April 26, 2004
      Bugs: #47918, #48435
        ID: 200404-18

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Synopsis
========

There are multiple format string vulnerabilities in the SSMTP package,
which may allow an attacker to run arbitrary code with ssmtp's
privileges (potentially root).

Background
==========

SSMTP is a very simple mail transfer agent (MTA) that relays mail from
the local machine to another SMTP host. It is not designed to function
as a full mail server; its sole purpose is to relay mail.

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

    -------------------------------------------------------------------
     Package         /    Vulnerable    /                   Unaffected
    -------------------------------------------------------------------
  1  net-mail/ssmtp      <= 2.60.4-r2                        >= 2.60.7

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

There are two format string vulnerabilities inside the log_event() and
die() functions of ssmtp. Strings from outside ssmtp are passed to
various printf()-like functions from within log_event() and die() as
format strings. An attacker could cause a specially-crafted string to
be passed to these functions, and potentially cause ssmtp to execute
arbitrary code.

Impact
======

If ssmtp connects to a malicious mail relay server, this vulnerability
can be used to execute code with the rights of the mail sender,
including root.

Workaround
==========

There is no known workaround at this time. All users are advised to
upgrade to the latest available version of ssmtp.

Resolution
==========

All users are advised to upgrade to the latest available version of
ssmtp.

    # emerge sync

    # emerge -pv ">=net-mail/ssmtp-2.60.7"
    # emerge ">=net-mail/ssmtp-2.60.7"

References
==========

  [ 1 ] Secunia Advisory
        http://secunia.com/advisories/11378/
  [ 2 ] CVE Reference
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0156
  [ 3 ] Debian Advisory
        http://lists.debian.org/debian-security-announce/debian-security-announce-2004/msg00084.html

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

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

     http://security.gentoo.org/glsa/glsa-200404-18.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
security () gentoo org or alternatively, you may file a bug at
http://bugs.gentoo.org.

License
=======

Copyright 2004 Gentoo Technologies, 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/1.0

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