Mailman is software to help manage email discussion lists.
A flaw was found in the way Mailman handles MIME multipart messages. An attacker could send a carefully crafted MIME multipart email message to a mailing list run by Mailman which would cause that particular mailing list to stop working. (CVE-2006-0052)
Users of Mailman should upgrade to this updated package, which contains backported patches to correct this issue.