Asterisk Project Security Advisory - AST-2017-009 Product Asterisk Summary Buffer overflow in pjproject header parsing can cause crash in Asterisk Nature of Advisory Denial of Service Susceptibility Remote Unauthenticated Sessions Severity Critical Exploits Known No Reported On October 5, 2017 Reported By Youngsung Kim at LINE Corporation Posted On Last Updated On October 25, 2017 Advisory Contact gjoseph AT digium DOT com CVE Name Description By carefully crafting invalid values in the Cseq and the Via header port, pjproject’s packet parsing code can create strings larger than the buffer allocated to hold them. This will usually cause Asterisk to crash immediately. The packets do not have to be authenticated. Resolution Stricter validation is now done on strings that represent numeric values before they are converted to intrinsic types. Invalid values now cause packet processing to stop and error messages to be emitted. Affected Versions Product Release Series Asterisk Open Source 13.x All Releases Asterisk Open Source 14.x All Releases Asterisk Open Source 15.x All Releases Certified Asterisk 13.13 All Releases Corrected In Product Release Asterisk Open Source 13.18.1, 14.7.1, 15.1.1 Certified Asterisk 13.13-cert7 Patches SVN URL Revision http://ift.tt/2hVqjaC Asterisk 13 http://ift.tt/2yiMttu Asterisk 14 http://ift.tt/2hVqjYa Asterisk 15 http://ift.tt/2yhKg1a Certified Asterisk 13.13 Links http://ift.tt/2hVqlzg Asterisk Project Security Advisories are posted at http://ift.tt/12wGWyz This document may be superseded by later versions; if so, the latest version will be posted at http://ift.tt/2hToOcT and http://ift.tt/2yiMvS8 Revision History Date Editor Revisions Made October 25, 2017 George Joseph Initial Revision Asterisk Project Security Advisory - AST-2017-009 Copyright © 2017 Digium, Inc. All Rights Reserved. Permission is hereby granted to distribute and publish this advisory in its original, unaltered form.
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