Updated mailman packages that close a DoS vulnerability present in mailman versions prior to version 2.1 are now available.
Mailman is a mailing list manager. Matthew Galgoci of Red Hat discovered a Denial of Service (DoS) vulnerability in versions of Mailman prior to 2.1. An attacker could send a carefully-crafted message causing mailman to crash. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CAN-2003-0991 to this issue. Users of Mailman are advised to upgrade to the erratum packages, which include a backported security fix and are not vulnerable to this issue. Red Hat would like to thank Barry Warsaw for providing a patch for this issue.