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Sicherheit: Zwei Probleme in junkbuster
Aktuelle Meldungen Distributionen
Name: Zwei Probleme in junkbuster
ID: 200504-11
Distribution: Gentoo
Plattformen: Keine Angabe
Datum: Do, 14. April 2005, 13:00
Referenzen: Keine Angabe
Applikationen: Privoxy

Originalnachricht

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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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