Cmd5Checkpw Security Vulnerabilities

CVE-2000-0990

cmd5checkpw 0.21 and earlier allows remote attackers to cause a denial of service via an "SMTP AUTH" command with an unknown username.

CVE-2005-0580

cmd5checkpw, when running setuid, does not properly drop privileges before calling the execvp function, which allows local users to read the poppasswd file.