The address parser code in Postfix 1.1.12 and earlier allows remote attackers to cause a denial of service (lock) via (1) a malformed envelope address to a local host that would generate a bounce and contains the ".!" string in the MAIL FROM or Errors-To headers, which causes nqmgr to lock up, or (2) via a valid MAIL FROM with a RCPT TO containing a ".!" string, which causes an instance of the SMTP listener to lock up.
|15200||Debian DSA-363-1 : postfix - denial of service, bounce-scanning||Nessus||Debian Local Security Checks|
|14063||Mandrake Linux Security Advisory : postfix (MDKSA-2003:081)||Nessus||Mandriva Local Security Checks|
|13802||SUSE-SA:2003:033: postfix||Nessus||SuSE Local Security Checks|
|11820||Postfix < 2.0 Multiple Vulnerabilities||Nessus||SMTP problems|