This indicates an attack attempt against a Code Execution vulnerability in Digium Asterisk.
The vulnerability is due to an error when the vulnerable software handles a maliciously crafted SIP request. A remote attacker may be able to exploit this to execute arbitrary code within the context of the application, via a crafted SIP request.
Digium Asterisk Open Source prior to 13.17.1
Digium Asterisk Open Source prior to 14.6.1
Digium Asterisk Open Source prior to 11.25.2
Digium Certified Asterisk prior to 11.6-cert17
Digium Certified Asterisk prior to 13.13-cert5
System Compromise: Remote attackers can gain control of vulnerable systems.
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