rssh 2.0.0 through 2.2.3 allows local users to bypass access restrictions and gain root privileges by using the rssh_chroot_helper command to chroot to an external directory.
bugs.debian.org/cgi-bin/bugreport.cgi?bug=344424
secunia.com/advisories/18224
secunia.com/advisories/18237
securityreason.com/securityalert/308
www.gentoo.org/security/en/glsa/glsa-200512-15.xml
www.pizzashack.org/rssh/security.shtml
www.securityfocus.com/bid/16050
exchange.xforce.ibmcloud.com/vulnerabilities/23854