Unspecified vulnerability in OpenVPN 2.1-beta14 through 2.1-rc8, when running on non-Windows systems, allows remote servers to execute arbitrary commands via crafted (1) "lladdr" and (2) "iproute" configuration directives, probably related to shell metacharacters.

More... (http://nvd.nist.gov/nvd.cfm?cvename=CVE-2008-3459)