Asterisk Security Team
2013-Mar-27 20:55 UTC
[asterisk-users] AST-2013-003: Username disclosure in SIP channel driver
Asterisk Project Security Advisory - AST-2013-003 Product Asterisk Summary Username disclosure in SIP channel driver Nature of Advisory Unauthorized data disclosure Susceptibility Remote Unauthenticated Sessions Severity Moderate Exploits Known No Reported On January 30, 2013 Reported By Walter Doekes, OSSO B.V. Posted On February 21, 2013 Last Updated On March 27, 2013 Advisory Contact Kinsey Moore <kmoore at digium.com> CVE Name CVE-2013-2264 Description When authenticating via SIP with alwaysauthreject enabled, allowguest disabled, and autocreatepeer disabled, Asterisk discloses whether a user exists for INVITE, SUBSCRIBE, and REGISTER transactions in multiple ways. This information was disclosed: * when a "407 Proxy Authentication Required" response was sent instead of "401 Unauthorized" response. * due to the presence or absence of additional tags at the end of "403 Forbidden" such as "(Bad auth)". * when a "401 Unauthorized" response was sent instead of "403 Forbidden" response after a retransmission. * when retransmissions were sent when a matching peer did not exist, but were not when a matching peer did exist. Resolution This issue can only be mitigated by upgrading to versions of Asterisk that contain the patch or applying the patch. Affected Versions Product Release Series Asterisk Open Source 1.8.x All Versions Asterisk Open Source 10.x All Versions Asterisk Open Source 11.x All Versions Certified Asterisk 1.8.15 All Versions Asterisk Business Edition C.3.x All Versions Asterisk Digiumphones 10.x-digiumphones All Versions Corrected In Product Release Asterisk Open Source 1.8.20.2, 10.12.2, 11.2.2 Asterisk Digiumphones 10.12.2-digiumphones Certified Asterisk 1.8.15-cert2 Asterisk Business Edition C.3.8.1 Patches SVN URL Revision http://downloads.asterisk.org/pub/security/AST-2013-003-1.8.diff Asterisk 1.8 http://downloads.asterisk.org/pub/security/AST-2013-003-10.diff Asterisk 10 http://downloads.asterisk.org/pub/security/AST-2013-003-11.diff Asterisk 11 http://downloads.asterisk.org/pub/security/AST-2013-003-1.8.15-cert.diff Certified Asterisk 1.8.15 http://downloads.asterisk.org/pub/security/AST-2013-003-C.3.diff Asterisk BE C.3 Links https://issues.asterisk.org/jira/browse/ASTERISK-21013 Asterisk Project Security Advisories are posted at http://www.asterisk.org/security This document may be superseded by later versions; if so, the latest version will be posted at http://downloads.digium.com/pub/security/AST-2013-003.pdf and http://downloads.digium.com/pub/security/AST-2013-003.html Revision History Date Editor Revisions Made 2013-02-20 Kinsey Moore Initial revision. 2013-02-27 Kinsey Moore Added Asterisk BE patch information. 2013-02-27 Kinsey Moore Corrected open source Asterisk versions. Asterisk Project Security Advisory - AST-2013-003 Copyright (c) 2013 Digium, Inc. All Rights Reserved. Permission is hereby granted to distribute and publish this advisory in its original, unaltered form.