Asterisk Open Source 1.6.0.x before 1.6.0.22, 1.6.1.x before 1.6.1.14, and 1.6.2.x before 1.6.2.2, and Business Edition C.3 before C.3.3.2, allows remote attackers to cause a denial of service (daemon crash) via an SIP T.38 negotiation with an SDP FaxMaxDatagram field that is (1) missing, (2) modified to contain a negative number, or (3) modified to contain a large number.
https://issues.asterisk.org/view.php?id=16724
https://issues.asterisk.org/view.php?id=16634
https://issues.asterisk.org/view.php?id=16517
http://www.vupen.com/english/advisories/2010/0289
http://www.securityfocus.com/bid/38047
http://www.securityfocus.com/archive/1/509327/100/0/threaded
http://securitytracker.com/id?1023532
http://secunia.com/advisories/39096
http://secunia.com/advisories/38395
http://lists.fedoraproject.org/pipermail/package-announce/2010-March/037679.html
http://downloads.asterisk.org/pub/security/AST-2010-001.html
http://downloads.asterisk.org/pub/security/AST-2010-001-1.6.2.diff
http://downloads.asterisk.org/pub/security/AST-2010-001-1.6.1.diff
http://downloads.asterisk.org/pub/security/AST-2010-001-1.6.0.diff