Code:  static void copyIPv6IfDifferent(void * dest, const void * src)
 {
	if(dest != src) {
 		memcpy(dest, src, sizeof(struct in6_addr));
 	}
 }

Vulnerability Type: DoS 
CWE ID: CWE-476
Summary: A Denial Of Service vulnerability in MiniUPnP MiniUPnPd through 2.1 exists due to a NULL pointer dereference in copyIPv6IfDifferent in pcpserver.c.
Commit Message: pcpserver.c: copyIPv6IfDifferent() check for NULL src argument