Gentoo: Net:Server: Format string vulnerability
Posted by Benjamin D. Thomas   
Gentoo A format string vulnerability has been reported in Net::Server which can be exploited to cause a Denial of Service.
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Gentoo Linux Security Advisory                           GLSA 200608-18
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: Net::Server: Format string vulnerability
      Date: August 10, 2006
      Bugs: #142386
        ID: 200608-18

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Synopsis
========

A format string vulnerability has been reported in Net::Server which
can be exploited to cause a Denial of Service.

Background
==========

Net::Server is an extensible, generic Perl server engine. It is used by
several Perl applications like Postgrey.

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

    -------------------------------------------------------------------
     Package              /  Vulnerable  /                  Unaffected
    -------------------------------------------------------------------
  1  dev-perl/net-server       < 0.88                          >= 0.88

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

The log function of Net::Server does not handle format string
specifiers properly before they are sent to syslog.

Impact
======

By sending a specially crafted datastream to an application using
Net::Server, an attacker could cause a Denial of Service.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All Net::Server should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=dev-perl/net-server-0.88"

References
==========

  [ 1 ] CVE-2005-1127
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-1127

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

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

  http://security.gentoo.org/glsa/glsa-200608-18.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 2006 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