Vulnerability Assessment & Network Security Forums
If through a vulnerability assessment, a network security issue is detected for the vulnerability below, applying the appropriate security patches in a timely matter is very important. If you have detected that your system has already been compromised, following CERT's Network Security recovery document will assist with recommended steps for system recovery.
Vulnerability Assessment Details
OpenVPN: Multiple vulnerabilities
Detailed Explanation for this Vulnerability Assessment
The remote host is affected by the vulnerability described in GLSA-200511-07
(OpenVPN: Multiple vulnerabilities)
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
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"
Network Security Threat Level: Medium
Networks Security ID:
Vulnerability Assessment Copyright: (C) 2005 Michel Arboi
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