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Asterisk RTP/RTCP Information Leak Vulnerability
Information
Severity
Severity
Family
Family
CVSSv2 Base
CVSSv2 Base
CVSSv2 Vector
CVSSv2 Vector
Solution Type
Solution Type
Created
Created
Modified
Modified
Summary
Asterisk is prone to an information leak in RTP/RTCP.
Insight
Insight
Insufficient RTCP packet validation could allow reading stale buffer contents and when combined with the 'nat' and 'symmetric_rtp' options allow redirecting where Asterisk sends the next RTCP report. The RTP stream qualification to learn the source address of media always accepted the first RTP packet as the new source and allowed what AST-2017-005 was mitigating. The intent was to qualify a series of packets before accepting the new source address.
Affected Software
Affected Software
Asterisk Open Source 11.x, 13.x, 14.x and Certified Asterisk 11.6 and 13.13.
Detection Method
Detection Method
Checks if a vulnerable version is present on the target host.
Solution
Solution
Upgrade to Version 11.25.3, 13.17.2, 14.6.2, 11.6-cert18, 13.13-cert6 or later.