GLSA 200504-11: JunkBuster: Multiple vulnerabilities

http://security.gentoo.org/

Severity:	high
Title:	JunkBuster: Multiple vulnerabilities
Date:	04/13/2005
Bugs:	#88537
ID:	200504-11

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	Architecture(s)
net-proxy/junkbuster	< 2.0.2-r3	>= 2.0.2-r3	All supported architectures

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 (CAN-2005-1108). Tavis Ormandy of the Gentoo Linux Security Audit Team identified a heap corruption issue in the filtering of URLs (CAN-2005-1109).

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 ">=net-proxy/junkbuster-2.0.2-r3"

References

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 https://bugs.gentoo.org.