Asterisk Project Security Advisory - AST-2012-013 Product Asterisk Summary ACL rules ignored when placing outbound calls by certain IAX2 users Nature of Advisory Unauthorized use of system Susceptibility Remote Authenticated Sessions Severity Moderate Exploits Known None Reported On 07/27/2012 Reported By Alan Frisch Posted On 08/30/2012 Last Updated On August 30, 2012 Advisory Contact Matt Jordan < mjordan AT digium DOT com > CVE Name CVE-2012-4737 Description When an IAX2 call is made using the credentials of a peer defined in a dynamic Asterisk Realtime Architecture (ARA) backend, the ACL rules for that peer are not applied to the call attempt. This allows for a remote attacker who is aware of a peer's credentials to bypass the ACL rules set for that peer. Resolution The ACL rules for peers defined in an ARA backend are now honored. Users of chan_iax2 should upgrade to the corrected versions; apply a provided patch; or define their IAX2 peers outside of an ARA backend in a static configuration file. Affected Versions Product Release Series Asterisk Open Source 1.8.x All versions Asterisk Open Source 10.x All versions Certified Asterisk 1.8.11 All versions Asterisk Digiumphones 10.x.x-digiumphones All versions Asterisk Business Edition C.3.x All versions Corrected In Product Release Asterisk Open Source 1.8.15.1, 10.7.1 Certified Asterisk 1.8.11-cert7 Asterisk Digiumphones 10.7.1-digiumphones Asterisk Business Edition C.3.7.6 Patches SVN URL Revision http://downloads.asterisk.org/pub/security/AST-2012-013.1.8.diff Asterisk 1.8 http://downloads.asterisk.org/pub/security/AST-2012-013.10.diff Asterisk 10 Links https://issues.asterisk.org/jira/browse/ASTERISK-20186 Asterisk Project Security Advisories are posted at http://www.asterisk.org/security This document may be superseded by later versions; if so, the latest version will be posted at http://downloads.digium.com/pub/security/AST-2012-013.pdf and http://downloads.digium.com/pub/security/AST-2012-013.html Revision History Date Editor Revisions Made 08/27/2012 Matt Jordan Initial Revision Asterisk Project Security Advisory - AST-2012-013 Copyright (c) 2012 Digium, Inc. All Rights Reserved. Permission is hereby granted to distribute and publish this advisory in its original, unaltered form.
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