Format string vulnerability in avpkeeper in Kaspersky KAV 3.5.135.2 for Sendmail allows remote attackers to cause a denial of service or possibly execute arbitrary code via a malformed mail message.
https://euvd.enisa.europa.eu/vulnerability/EUVD-2001-0774
http://archives.neohapsis.com/archives/bugtraq/2001-06/0274.html