CVE-2018-7285

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Summary

CVECVE-2018-7285
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2018-02-22 00:29:00 UTC
Updated2018-03-21 12:56:00 UTC
DescriptionA NULL pointer access issue was discovered in Asterisk 15.x through 15.2.1. The RTP support in Asterisk maintains its own registry of dynamic codecs and desired payload numbers. While an SDP negotiation may result in a codec using a different payload number, these desired ones are still stored internally. When an RTP packet was received, this registry would be consulted if the payload number was not found in the negotiated SDP. This registry was incorrectly consulted for all packets, even those which are dynamic. If the payload number resulted in a codec of a different type than the RTP stream (for example, the payload number resulted in a video codec but the stream carried audio), a crash could occur if no stream of that type had been negotiated. This was due to the code incorrectly assuming that a stream of that type would always exist.

Risk And Classification

Problem Types: CWE-476

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Digium Asterisk All All All All

References

ReferenceSourceLinkTags
Asterisk Payload Negotiation Error Lets Remote Users Cause the Target Service to Crash - SecurityTracker SECTRACK www.securitytracker.com Third Party Advisory, VDB Entry
Asterisk Open Source CVE-2018-7285 Denial of Service Vulnerability BID www.securityfocus.com Third Party Advisory, VDB Entry
AST-2018-001 CONFIRM downloads.asterisk.org Patch, Vendor Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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