Bug 1404036 (CVE-2016-9937)

Summary: CVE-2016-9937 asterisk: Crash on SDP offer or answer from endpoint using Opus
Product: [Other] Security Response Reporter: Adam Mariš <amaris>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED NOTABUG QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: bazanluis20, g.devel, itamar, jsmith.fedora, rbryant
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: asterisk 13.13.1, asterisk 14.2.1 Doc Type: If docs needed, set a value
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Last Closed: 2016-12-12 22:47:24 UTC Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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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