When Asterisk sends a re-invite initiating T.38 faxing and the endpoint responds with a m=image line and zero port, a crash will occur in Asterisk. This is a re-occurrence of AST-2019-004.
d43d5cb9a0201ce6df31db1a1a9561360db4a1bb17c19f46dd04be62c2e79557
Asterisk Project Security Advisory - When Asterisk sends a re-invite initiating T.38 faxing, and the endpoint responds with a declined media stream a crash will then occur in Asterisk.
bb7ad078a0f3af2b1a5200e64d077cdaa043b5c90eed178634116a901bf0a64c