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Gentoo Linux Security Advisory GLSA 200411-07
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http://security.gentoo.org/
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Severity: Normal
Title: Proxytunnel: Format string vulnerability
Date: November 03, 2004
Bugs: #69379
ID: 200411-07
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Synopsis
========
Proxytunnel is vulnerable to a format string vulnerability, potentially
allowing a remote server to execute arbitrary code with the rights of
the Proxytunnel process.
Background
==========
Proxytunnel is a program that tunnels connections to a remote server
through a standard HTTPS proxy.
Affected packages
=================
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Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 net-misc/proxytunnel < 1.2.3 >= 1.2.3
Description
===========
Florian Schilhabel of the Gentoo Linux Security Audit project found a
format string vulnerability in Proxytunnel. When the program is started
in daemon mode (-a [port]), it improperly logs invalid proxy answers to
syslog.
Impact
======
A malicious remote server could send specially-crafted invalid answers
to exploit the format string vulnerability, potentially allowing the
execution of arbitrary code on the tunnelling host with the rights of
the Proxytunnel process.
Workaround
==========
You can mitigate the issue by only allowing connections to trusted
remote servers.
Resolution
==========
All Proxytunnel users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=net-misc/proxytunnel-1.2.3"
References
==========
[ 1 ] CAN-2004-0992
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0992
[ 2 ] Proxytunnel News
http://proxytunnel.sourceforge.net/news.html
Availability
============
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
http://security.gentoo.org/glsa/glsa-200411-07.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@xxxxxxxxxx or alternatively, you may file a bug at
http://bugs.gentoo.org.
License
=======
Copyright 2004 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/1.0
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