Heap-based buffer overflow in the SIPParser function in i3sipmsg.dll in Interaction SIP Proxy before 3.0.011 allows remote attackers to cause a denial of service and possibly execute arbitrary code via a REGISTER request with a SPI version number that contains a large number of space or tab characters.
https://exchange.xforce.ibmcloud.com/vulnerabilities/23823
http://www.vupen.com/english/advisories/2005/3029
http://www.securityfocus.com/archive/1/419989/100/0/threaded
http://securitytracker.com/id?1015392