Download: http://openvpn.net/download.html
2008.07.31 -- Version 2.1_rc9 * Security Fix -- affects non-Windows OpenVPN clients running OpenVPN 2.1-beta14 through 2.1-rc8 (OpenVPN 2.0.x clients are NOT vulnerable nor are any versions of the OpenVPN server vulnerable). An OpenVPN client connecting to a malicious or compromised server could potentially receive an "lladdr" or "iproute" configuration directive from the server which could cause arbitrary code execution on the client. A successful attack requires that (a) the client has agreed to allow the server to push configuration directives to it by including "pull" or the macro "client" in its configuration file, (b) the client successfully authenticates the server, (c) the server is malicious or has been compromised and is under the control of the attacker, and (d) the client is running a non-Windows OS. Credit: David Wagner. * Miscellaneous defensive programming changes to multiple areas of the code. In particular, use of the system() call for calling executables such as ifconfig, route, and user-defined scripts has been completely revamped in favor of execve() on unix and CreateProcess() on Windows. * In Windows build, package a statically linked openssl.exe to work around observed instabilities in the dynamic build since the migration to OpenSSL 0.9.8h. James
