[gentoo-announce] [ GLSA 200504-11 ] JunkBuster: Multiple vulnerabilities

[Sune Kloppenborg Jeppesen <jaervosz () gentoo org>]

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Gentoo Linux Security Advisory                           GLSA 200504-11
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                                            http://security.gentoo.org/
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  Severity: High
     Title: JunkBuster: Multiple vulnerabilities
      Date: April 13, 2005
      Bugs: #88537
        ID: 200504-11

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Synopsis
========

JunkBuster is vulnerable to a heap corruption vulnerability, and under
certain configurations may allow an attacker to modify settings.

Background
==========

JunkBuster is a filtering HTTP proxy, designed to enhance privacy and
remove unwanted content.

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

    -------------------------------------------------------------------
     Package               /  Vulnerable  /                 Unaffected
    -------------------------------------------------------------------
  1  www-proxy/junkbuster     < 2.0.2-r3                   >= 2.0.2-r3

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

James Ranson reported a vulnerability when JunkBuster is configured to
run in single-threaded mode, an attacker can modify the referrer
setting by getting a victim to request a specially crafted URL. Tavis
Ormandy of the Gentoo Linux Security Audit Team identified a heap
corruption issue in the filtering of URLs.

Impact
======

If JunkBuster has been configured to run in single-threaded mode, an
attacker can disable or modify the filtering of Referrer: HTTP headers,
potentially compromising the privacy of users. The heap corruption
vulnerability could crash or disrupt the operation of the proxy,
potentially executing arbitrary code.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All JunkBuster users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=www-proxy/junkbuster-2.0.2-r3"

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

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

  http://security.gentoo.org/glsa/glsa-200504-11.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 2005 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/2.0

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