SIP: Server Response - Bad Request (400)
This signature detects attempts to exploit a known vulnerability against Session Initiation Protocol (SIP). Detecting a SIP server response of 400, Bad Request, can indicate a client can be incorrectly configured, or an attacker can be attacking your server. Further investigations of the client might be warranted.
References
mx-19.3
vmx-19.3
vsrx-19.2
srx-19.3
srx-branch-19.3
vsrx3bsd-19.2
srx-19.4
vsrx3bsd-19.4
srx-branch-19.4
vsrx-19.4
vmx-19.4
mx-19.4
srxevo-25.4
vsrx-26.2
srx-26.2
srx-branch-26.2
vsrx3bsd-26.2
mx-12.3
srx-12.3
srx-branch-12.3
vsrx-12.3