Format string vulnerability in pw_error function in BSD libutil library allows local users to gain root privileges via a malformed password in commands such as chpass or passwd.
ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-00:58.chpass.asc
ftp://ftp.NetBSD.ORG/pub/NetBSD/misc/security/advisories/NetBSD-SA2000-015.txt.asc
marc.info/?l=bugtraq&m=97068555106135&w=2
www.openbsd.org/errata27.html#pw_error
www.securityfocus.com/bid/1744
exchange.xforce.ibmcloud.com/vulnerabilities/5339