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

asterisk -- Remote Crash Vulnerability in WebSocket Server

Affected packages
asterisk11 < 11.14.2


VuXML ID 94268da0-8118-11e4-a180-001999f8d30b
Discovery 2014-10-30
Entry 2014-12-11
Modified 2015-01-29

The Asterisk project reports:

When handling a WebSocket frame the res_http_websocket module dynamically changes the size of the memory used to allow the provided payload to fit. If a payload length of zero was received the code would incorrectly attempt to resize to zero. This operation would succeed and end up freeing the memory but be treated as a failure. When the session was subsequently torn down this memory would get freed yet again causing a crash.

Users of the WebSocket functionality also did not take into account that provided text frames are not guaranteed to be NULL terminated. This has been fixed in chan_sip and chan_pjsip in the applicable versions.


CVE Name CVE-2014-9374