ageet AGEphone before 1.6.2, running on Windows Mobile 5 on the HTC HyTN Pocket PC device, allows remote attackers to (1) cause a denial of service (call disruption and device hang) via a SIP message with a malformed header and (2) cause a denial of service (call disruption, false ring indication, and device outage) via a SIP message with a malformed SDP delimiter.
https://exchange.xforce.ibmcloud.com/vulnerabilities/35067
http://www.sipera.com/index.php?action=resources%2Cthreat_advisory&tid=215&
http://www.sipera.com/index.php?action=resources%2Cthreat_advisory&tid=214&
http://www.securityfocus.com/bid/24543
http://www.securityfocus.com/bid/24540
http://www.ageet.com/us/agephone/help/index.htm#vers