Synopsis :

The remote mail server is susceptible to a denial of service attack.

Description :

It was possible to perform a denial of service against the remote SMTP
server by sending it two HELO commands followed by a too long
argument. This allows an unauthenticated, remote attacker to deny
service to legitimate users of the server.

See also :

http://archives.neohapsis.com/archives/bugtraq/1999_1/0199.html

Solution :

Contact the vendor for a fix.

Risk factor :

Medium / CVSS Base Score : 5.0
(CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P)