3proxy: Denial of Service

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Gentoo Linux Security Advisory                          
GLSA 200711-13
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                                            http://security.gentoo.or
g/
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  Severity: Normal
     Title: 3proxy: Denial of Service
      Date: November 08, 2007
      Bugs: #196772
        ID: 200711-13

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Synopsis
========

A vulnerability has been discovered in 3proxy, possibly
resulting in a
Denial of Service.

Background
==========

3proxy is a really tiny cross-platform proxy servers set,
including
HTTP, HTTPS, FTP, SOCKS and POP3 support.

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

   
------------------------------------------------------------
-------
     Package           /  Vulnerable  /                    
Unaffected
   
------------------------------------------------------------
-------
  1  net-proxy/3proxy      < 0.5.3j                      
   >= 0.5.3j

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

3proxy contains a double free vulnerability in the
ftpprchild()
function, which frees param->hostname and calls the
parsehostname()
function, which in turn attempts to free param->hostname
again.

Impact
======

A remote attacker could send a specially crafted request to
the proxy,
possibly resulting in a Denial of Service. Under typical
configuration,
the scope of this vulnerability is limited to the local
network.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All 3proxy users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose
">=net-proxy/3proxy-0.5.3j"

References
==========

  [ 1 ] CVE-2007-5622
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-200
7-5622

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

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

  ht
tp://security.gentoo.org/glsa/glsa-200711-13.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
securitygentoo.org or alternatively, you may file a bug at
http://bugs.gentoo.org.

License
=======

Copyright 2007 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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