GLSA-200511-07 : OpenVPN: Multiple vulnerabilities

high Nessus Plugin ID 20157

Synopsis

The remote Gentoo host is missing one or more security-related patches.

Description

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.
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.

Solution

All OpenVPN users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose '>=net-misc/openvpn-2.0.4'

Plugin Details

Severity: High

ID: 20157

File Name: gentoo_GLSA-200511-07.nasl

Version: 1.16

Type: local

Family: Gentoo Local Security Checks

Published: 11/7/2005

Updated: 1/6/2021

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.4

CVSS v2

Risk Factor: High

Base Score: 7.5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P

Vulnerability Information

CPE: p-cpe:/a:gentoo:linux:openvpn, cpe:/o:gentoo:linux

Required KB Items: Host/local_checks_enabled, Host/Gentoo/release, Host/Gentoo/qpkg-list

Patch Publication Date: 11/6/2005

Reference Information

CVE: CVE-2005-3393, CVE-2005-3409

GLSA: 200511-07

Detections

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