Sudo before 1.6.6 contains an off-by-one error that can result in a heap-based buffer overflow that may allow local users to gain root privileges via special characters in the -p (prompt) argument, which are not properly expanded.
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www.debian.org/security/2002/dsa-128
www.iss.net/security_center/static/8936.php
www.kb.cert.org/vuls/id/820083
www.linux-mandrake.com/en/security/2002/MDKSA-2002-028.php3
www.linuxsecurity.com/advisories/other_advisory-2040.html
www.novell.com/linux/security/advisories/2002_014_sudo_txt.html
www.redhat.com/support/errata/RHSA-2002-071.html
www.redhat.com/support/errata/RHSA-2002-072.html
www.securityfocus.com/bid/4593