CVE-2016-9937
Description
An issue was discovered in Asterisk Open Source 13.12.x and 13.13.x before 13.13.1 and 14.x before 14.2.1. 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.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| debian | bullseye | fixed | 0 |
| debian | sid | fixed | 0 |
References
- https://security-tracker.debian.org/tracker/CVE-2016-9937
- http://downloads.asterisk.org/pub/security/AST-2016-008-13.diff
- http://downloads.asterisk.org/pub/security/AST-2016-008-14.diff
- http://downloads.asterisk.org/pub/security/AST-2016-008.html
- http://www.securityfocus.com/bid/94792
- http://www.securitytracker.com/id/1037407
- https://issues.asterisk.org/jira/browse/ASTERISK-26579
CWEs
CWE-119
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.