OpenSSH 3.0.1 and earlier with UseLogin enabled does not properly cleanse critical environment variables such as LD_PRELOAD, which allows local users to gain root privileges.
http://frontal2.mandriva.com/security/advisories?name=MDKSA-2001:092
http://lists.suse.com/archives/suse-security-announce/2001-Dec/0001.html
http://marc.info/?l=bugtraq&m=100749779131514&w=2
http://marc.info/?l=openssh-unix-dev&m=100747128105913&w=2
https://exchange.xforce.ibmcloud.com/vulnerabilities/7647
http://www1.itrc.hp.com/service/cki/docDisplay.do?docId=HPSBUX0112-005
http://www.ciac.org/ciac/bulletins/m-026.shtml
http://www.debian.org/security/2001/dsa-091