Bug 1404036 (CVE-2016-9937) - CVE-2016-9937 asterisk: Crash on SDP offer or answer from endpoint using Opus
Summary: CVE-2016-9937 asterisk: Crash on SDP offer or answer from endpoint using Opus
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2016-9937
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2016-12-12 22:47 UTC by Adam Mariš
Modified: 2021-02-17 02:53 UTC (History)
5 users (show)

Fixed In Version: asterisk 13.13.1, asterisk 14.2.1
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Last Closed: 2016-12-12 22:47:24 UTC


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Description Adam Mariš 2016-12-12 22:47:00 UTC
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.

External Reference:

http://downloads.asterisk.org/pub/security/AST-2016-008.html


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