Package name
openvpn
Date
2005-08-22
Advisory ID
MDKSA-2005:145
Affected versions
MNF2.0 i586

Problem description

A number of vulnerabilities were discovered in OpenVPN that were fixed in the 2.0.1 release: A DoS attack against the server when run with "verb 0" and without "tls-auth" when a client connection to the server fails certificate verification, the OpenSSL error queue is not properly flushed. This could result in another unrelated client instance on the server seeing the error and responding to it, resulting in a disconnection of the unrelated client (CAN-2005-2531). A DoS attack against the server by an authenticated client that sends a packet which fails to decrypt on the server, the OpenSSL error queue was not properly flushed. This could result in another unrelated client instance on the server seeing the error and responding to it, resulting in a disconnection of the unrelated client (CAN-2005-2532). A DoS attack against the server by an authenticated client is possible in "dev tap" ethernet bridging mode where a malicious client could theoretically flood the server with packets appearing to come from hundreds of thousands of different MAC addresses, resulting in the OpenVPN process exhausting system virtual memory (CAN-2005-2533). If two or more client machines tried to connect to the server at the same time via TCP, using the same client certificate, a race condition could crash the server if --duplicate-cn is not enabled on the server (CAN-2005-2534). This update provides OpenVPN 2.0.1 which corrects these issues as well as a number of other bugs.

Updated packages

MNF2.0 i586

 20daf4b6f9dbc1c53f3b4f4d375262d4  mnf/2.0/RPMS/openvpn-2.0.1-0.1.M20mdk.i586.rpm
a92bbc0c8285fecfbe3f439d18a62580  mnf/2.0/SRPMS/openvpn-2.0.1-0.1.M20mdk.src.rpm

References