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

asterisk -- Crash on SDP offer or answer from endpoint using Opus

Affected packages
13.12.0 <= asterisk13 < 13.13.1


VuXML ID 9e6640fe-be3a-11e6-b04f-001999f8d30b
Discovery 2016-11-11
Entry 2016-12-09

The Asterisk project reports:

If an SDP offer or answer is received with the Opus codec and with the format parameters separated using a space the code responsible for parsing will recursively call itself until it crashes. This occurs as the code does not properly handle spaces separating the parameters. This does NOT require the endpoint to have Opus configured in Asterisk. This also does not require the endpoint to be authenticated. If guest is enabled for chan_sip or anonymous in chan_pjsip an SDP offer or answer is still processed and the crash occurs.