drachtio-server memory mis-reference vulnerability

drachtio-server is a SIP server built on the sofia SIP stack by drachtio open source. drachtio drachtio-server version 0.8.18 is vulnerable to a memory misquoting vulnerability that stems from the request-handler.cpp component receiving requests when the event The _cb instruction responsible for freeing memory is garbled. An attacker could exploit the vulnerability to execute arbitrary code.