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TUCoPS :: Linux :: Gentoo :: tb13337.htm

3proxy: Denial of Service

Better a bottle in front of me than a frontal lobotomy.

3proxy: Denial of Service
3proxy: Denial of Service



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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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