JunkBuster: Multiple vulnerabilities
Gentoo Linux Security Advisory
||GLSA 200504-11 / junkbuster
||April 13, 2005
||April 21, 2005: 02
All supported architectures
JunkBuster is vulnerable to a heap corruption vulnerability, and under
certain configurations may allow an attacker to modify settings.
JunkBuster is a filtering HTTP proxy, designed to enhance privacy and
remove unwanted content.
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
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.
There is no known workaround at this time.
All JunkBuster users should upgrade to the latest version:
Code Listing 3.1: Resolution
# emerge --sync
# emerge --ask --oneshot --verbose ">=net-proxy/junkbuster-2.0.2-r3"