EUVD-2019-8638

Malware in sbrugna...

Denial Of Service (DoS)

Sangoma Asterisk is vulnerable to denial of service. The vulnerability exists because it receives a re-invite initiating T.38 faxing and has a port of 0 and no c line in the SDP resulting an application crash...

CVE-2019-18976

An issue was discovered in respjsipt38.c in Sangoma Asterisk through 13.x and Certified Asterisk through 13.21-x. If it receives a re-invite initiating T.38 faxing and has a port of 0 and no c line in the SDP, a NULL pointer dereference and crash will occur. This is different from CVE-2019-18940...

Null pointer dereference

An issue was discovered in respjsipt38.c in Sangoma Asterisk through 13.x and Certified Asterisk through 13.21-x. If it receives a re-invite initiating T.38 faxing and has a port of 0 and no c line in the SDP, a NULL pointer dereference and crash will occur. This is different from CVE-2019-18940...

CVE-2019-18976

An issue was discovered in respjsipt38.c in Sangoma Asterisk through 13.x and Certified Asterisk through 13.21-x. If it receives a re-invite initiating T.38 faxing and has a port of 0 and no c line in the SDP, a NULL pointer dereference and crash will occur. This is different from CVE-2019-18940...

asterisk -- Remote Crash Vulnerability in chan_sip channel driver

The Asterisk project reports: When T.38 faxing is done in Asterisk a T.38 reinvite may be sent to an endpoint to switch it to T.38. If the endpoint responds with an improperly formatted SDP answer including both a T.38 UDPTL stream and an audio or video stream containing only codecs not allowed o...