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Gentoo Linux Security Advisory                           GLSA 200711-13
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                                            http://security.gentoo.org/
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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-2007-5622

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

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

  http://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
security@gentoo.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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