GLSA 200504-11: JunkBuster: Multiple vulnerabilities
Posted on: 04/13/2005 02:47 PM

A JunkBuster security update is available for Gentoo Linux

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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
================

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Package / Vulnerable / Unaffected
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1 www-proxy/junkbuster lt; 2.0.2-r3 gt;= 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 "gt;=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
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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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