Format string vulnerability in the foreign_option function in options.c for OpenVPN 2.0.x allows remote clients to execute arbitrary code via format string specifiers in a push of the dhcp-option command option.
marc.info/?l=bugtraq&m=113081023121059&w=2
openvpn.net/changelog.html
secunia.com/advisories/17376
secunia.com/advisories/17447
secunia.com/advisories/17452
secunia.com/advisories/17480
www.debian.org/security/2005/dsa-885
www.gentoo.org/security/en/glsa/glsa-200511-07.xml
www.novell.com/linux/security/advisories/2005_25_sr.html
www.securityfocus.com/archive/1/415487
www.securityfocus.com/bid/15239
www.vupen.com/english/advisories/2005/2255