mailman is vulnerable to denial of service (DoS). The vulnerability exists as a flaw was found in the way Mailman handled MIME multipart messages. An attacker could send a carefully crafted MIME multipart email message to a mailing list run by Mailman which caused that particular mailing list to stop working.
mail.python.org/pipermail/mailman-announce/2006-September/000087.html
rhn.redhat.com/errata/RHSA-2006-0600.html
secunia.com/advisories/21732
secunia.com/advisories/21792
secunia.com/advisories/21837
secunia.com/advisories/21879
secunia.com/advisories/22011
secunia.com/advisories/22020
secunia.com/advisories/22639
security.gentoo.org/glsa/glsa-200609-12.xml
securitytracker.com/id?1016808
sourceforge.net/project/shownotes.php?group_id=103&release_id=444295
svn.sourceforge.net/viewvc/mailman/trunk/mailman/Mailman/Utils.py?r1=7859&r2=7923
www.mandriva.com/security/advisories?name=MDKSA-2006:165
www.novell.com/linux/security/advisories/2006_25_sr.html
www.redhat.com/security/updates/classification/#moderate
www.securityfocus.com/bid/19831
www.ubuntu.com/usn/usn-345-1
www.vupen.com/english/advisories/2006/3446
access.redhat.com/errata/RHSA-2006:0600
exchange.xforce.ibmcloud.com/vulnerabilities/28732
oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9912