Multiple buffer overflows in Asterisk Open Source 1.4.x before 1.4.18.1 and 1.4.19-rc3, Open Source 1.6.x before 1.6.0-beta6, Business Edition C.x.x before C.1.6.1, AsteriskNOW 1.0.x before 1.0.2, Appliance Developer Kit before 1.4 revision 109386, and s800i 1.1.x before 1.1.0.2 allow remote attackers to (1) write a zero to an arbitrary memory location via a large RTP payload number, related to the ast_rtp_unset_m_type function in main/rtp.c; or (2) write certain integers to an arbitrary memory location via a large number of RTP payloads, related to the process_sdp function in channels/chan_sip.c.
downloads.digium.com/pub/security/AST-2008-002.html
labs.musecurity.com/advisories/MU-200803-01.txt
secunia.com/advisories/29426
secunia.com/advisories/29470
securityreason.com/securityalert/3763
securitytracker.com/id?1019628
www.asterisk.org/node/48466
www.securityfocus.com/archive/1/489817/100/0/threaded
www.securityfocus.com/bid/28308
www.vupen.com/english/advisories/2008/0928
exchange.xforce.ibmcloud.com/vulnerabilities/41302
exchange.xforce.ibmcloud.com/vulnerabilities/41305
www.redhat.com/archives/fedora-package-announce/2008-March/msg00438.html
www.redhat.com/archives/fedora-package-announce/2008-March/msg00514.html