FreeBSD VuXML: Documenting security issues in FreeBSD and the FreeBSD Ports Collection

asterisk -- Crash on ACK from unknown endpoint

Affected packages
13.10.0 <= asterisk13 < 13.11.1


VuXML ID 7fda7920-7603-11e6-b362-001999f8d30b
Discovery 2016-08-03
Entry 2016-09-08

The Asterisk project reports:

Asterisk can be crashed remotely by sending an ACK to it from an endpoint username that Asterisk does not recognize. Most SIP request types result in an "artificial" endpoint being looked up, but ACKs bypass this lookup. The resulting NULL pointer results in a crash when attempting to determine if ACLs should be applied.

This issue was introduced in the Asterisk 13.10 release and only affects that release.

This issue only affects users using the PJSIP stack with Asterisk. Those users that use chan_sip are unaffected.