Joined: 12 May 2004
|Posted: Sun Nov 06, 2005 6:50 pm Post subject: [ GLSA 200511-07 ] OpenVPN: Multiple vulnerabilities
|Gentoo Linux Security Advisory
Title: OpenVPN: Multiple vulnerabilities (GLSA 200511-07)
Date: November 06, 2005
The OpenVPN client is potentially vulnerable to the execution of arbitrary code and the OpenVPN server is vulnerable to a Denial of Service issue.
OpenVPN is a multi-platform, full-featured SSL VPN solution.
Vulnerable: < 2.0.4
Unaffected: >= 2.0.4
Architectures: All supported architectures
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.
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.
Do not use "pull" or "client" options in the OpenVPN client configuration file, and use UDP mode for the OpenVPN server.
All OpenVPN users should upgrade to the latest version:
|# emerge --sync
# emerge --ask --oneshot --verbose ">=net-misc/openvpn-2.0.4"
Last edited by GLSA on Sun May 07, 2006 4:59 pm; edited 1 time in total