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Family: Gentoo Local Security Checks --> Category: infos

[GLSA-200511-07] OpenVPN: Multiple vulnerabilities Vulnerability Scan

Vulnerability Scan Summary
OpenVPN: Multiple vulnerabilities

Detailed Explanation for this Vulnerability Test
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
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"

Threat Level: Medium

Click HERE for more information and discussions on this network vulnerability scan.


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