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GLSA 200511-07 OpenVPN: Multiple vulnerabilities
Posted by Bob on: 11/06/2005 08:12 PM [ Print | 0 comment(s) ]
A new security update has been released for Gentoo Linux - OpenVPN: Multiple vulnerabilities. Here the announcement:
Gentoo Linux Security Advisory GLSA 200511-07
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http://security.gentoo.org/
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Severity: Normal
Title: OpenVPN: Multiple vulnerabilities
Date: November 06, 2005
Bugs: #111116
ID: 200511-07
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Synopsis
========
The OpenVPN client is potentially vulnerable to the execution of
arbitrary code and the OpenVPN server is vulnerable to a Denial of
Service issue.
Background
==========
OpenVPN is a multi-platform, full-featured SSL VPN solution.
Affected packages
=================
-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 net-misc/openvpn lt; 2.0.4 gt;= 2.0.4
Description
===========
The OpenVPN client contains a format string bug in the handling of the
foreign_option in options.c. Furthermore, when the OpenVPN server runs
in TCP mode, it may dereference a NULL pointer under specific error
conditions.
Impact
======
A remote attacker could setup a malicious OpenVPN server and trick the
user into connecting to it, potentially executing arbitrary code on the
client's computer. A remote attacker could also exploit the NULL
dereference issue by sending specific packets to an OpenVPN server
running in TCP mode, resulting in a Denial of Service condition.
Workaround
==========
Do not use "pull" or "client" options in the OpenVPN client
configuration file, and use UDP mode for the OpenVPN server.
Resolution
==========
All OpenVPN users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose "gt;=net-misc/openvpn-2.0.4"
References
==========
[ 1 ] CVE-2005-3393
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-3393
[ 2 ] CVE-2005-3409
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-3409
[ 3 ] OpenVPN changelog
http://openvpn.net/changelog.html
Availability
============
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
http://security.gentoo.org/glsa/glsa-200511-07.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 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
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
http://security.gentoo.org/
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Severity: Normal
Title: OpenVPN: Multiple vulnerabilities
Date: November 06, 2005
Bugs: #111116
ID: 200511-07
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Synopsis
========
The OpenVPN client is potentially vulnerable to the execution of
arbitrary code and the OpenVPN server is vulnerable to a Denial of
Service issue.
Background
==========
OpenVPN is a multi-platform, full-featured SSL VPN solution.
Affected packages
=================
-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 net-misc/openvpn lt; 2.0.4 gt;= 2.0.4
Description
===========
The OpenVPN client contains a format string bug in the handling of the
foreign_option in options.c. Furthermore, when the OpenVPN server runs
in TCP mode, it may dereference a NULL pointer under specific error
conditions.
Impact
======
A remote attacker could setup a malicious OpenVPN server and trick the
user into connecting to it, potentially executing arbitrary code on the
client's computer. A remote attacker could also exploit the NULL
dereference issue by sending specific packets to an OpenVPN server
running in TCP mode, resulting in a Denial of Service condition.
Workaround
==========
Do not use "pull" or "client" options in the OpenVPN client
configuration file, and use UDP mode for the OpenVPN server.
Resolution
==========
All OpenVPN users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose "gt;=net-misc/openvpn-2.0.4"
References
==========
[ 1 ] CVE-2005-3393
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-3393
[ 2 ] CVE-2005-3409
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-3409
[ 3 ] OpenVPN changelog
http://openvpn.net/changelog.html
Availability
============
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
http://security.gentoo.org/glsa/glsa-200511-07.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 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
