Flaw bug created to hold information about an old flaw we knew something about. For more details see the MITRE CVE description.
MITRE description: Mailman 2.1.4 through 2.1.6 allows remote attackers to cause a denial of service via a message that causes the server to "fail with an Overflow on bad date data in a processed message," a different vulnerability than CVE-2005-3573.