[Full-Disclosure] [ GLSA 200411-07 ] Proxytunnel: Format string vulnerability

2004-11-03T00:00:00
ID SECURITYVULNS:DOC:7125
Type securityvulns
Reporter Securityvulns
Modified 2004-11-03T00:00:00

Description


Gentoo Linux Security Advisory GLSA 200411-07


                                        http://security.gentoo.org/

Severity: Normal Title: Proxytunnel: Format string vulnerability Date: November 03, 2004 Bugs: #69379 ID: 200411-07


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

-------------------------------------------------------------------
 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 &quot;&gt;=net-misc/proxytunnel-1.2.3&quot;

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@gentoo.org 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