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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2018.1737.2 Asterisk Project Security Advisories 13 June 2018 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Asterisk Publisher: Asterisk Operating System: Windows UNIX variants (UNIX, Linux, OSX) Impact/Access: Denial of Service -- Existing Account Reduced Security -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2018-12228 CVE-2018-12227 Original Bulletin: http://downloads.asterisk.org/pub/security/AST-2018-007.html http://downloads.asterisk.org/pub/security/AST-2018-008.html Comment: This bulletin contains two (2) Asterisk security advisories. Revision History: June 13 2018: Asterisk updated bulletins to include CVEs June 12 2018: Initial Release - --------------------------BEGIN INCLUDED TEXT-------------------- Asterisk Project Security Advisory - AST-2018-007 Product Asterisk Summary Infinite loop when reading iostreams Nature of Advisory Denial of Service Susceptibility Remote Authenticated Sessions Severity Critical Exploits Known No Reported On April 16, 2018 Reported By Sean Bright Posted On June 11, 2018 Last Updated On June 11, 2018 Advisory Contact Kevin Harwell <kharwell AT digium DOT com> CVE Name CVE-2018-12228 Description When connected to Asterisk via TCP/TLS if the client abruptly disconnects, or sends a specially crafted message then Asterisk gets caught in an infinite loop while trying to read the data stream. Thus rendering the system as unusable. Resolution Stricter error checking is now done when iostreams encounters a problem. When an error occurs during reading it is now properly handled, and continued reading is appropriately stopped. Affected Versions Product Release Series Asterisk Open Source 15.x All Releases Corrected In Product Release Asterisk Open Source 15.4.1 Patches SVN URL Revision http://downloads.asterisk.org/pub/security/AST-2018-007-15.diff Asterisk 15 Links https://issues.asterisk.org/jira/browse/ASTERISK-27807 Asterisk Project Security Advisories are posted at http://www.asterisk.org/security This document may be superseded by later versions; if so, the latest version will be posted at http://downloads.digium.com/pub/security/AST-2018-007.pdf and http://downloads.digium.com/pub/security/AST-2018-007.html Revision History Date Editor Revisions Made April 25, 2018 Kevin Harwell Initial Revision Asterisk Project Security Advisory - AST-2018-007 Copyright (C) 2018 Digium, Inc. All Rights Reserved. Permission is hereby granted to distribute and publish this advisory in its original, unaltered form. - ------------------------------------------------------------------------------- Asterisk Project Security Advisory - AST-2018-008 Product Asterisk Summary PJSIP endpoint presence disclosure when using ACL Nature of Advisory Unauthorized data disclosure Susceptibility Remote Unauthenticated Sessions Severity Minor Exploits Known No Reported On April 19, 2018 Reported By John Posted On June 11, 2018 Last Updated On June 11, 2018 Advisory Contact Rmudgett AT digium DOT com CVE Name CVE-2018-12227 Description When endpoint specific ACL rules block a SIP request they respond with a 403 forbidden. However, if an endpoint is not identified then a 401 unauthorized response is sent. This vulnerability just discloses which requests hit a defined endpoint. The ACL rules cannot be bypassed to gain access to the disclosed endpoints. Resolution Endpoint specific ACL rules now respond with a 401 challenge which is the same as if an endpoint were not identified. An alternate is to use global ACL rules to avoid the information disclosure. Affected Versions Product Release Series Asterisk Open Source 13.x 13.10.0 and later Asterisk Open Source 14.x All releases Asterisk Open Source 15.x All releases Certified Asterisk 13.18 All releases Certified Asterisk 13.21 All releases Corrected In Product Release Asterisk Open Source 13.21.1, 14.7.7, 15.4.1 Certified Asterisk 13.18-cert4, 13.21-cert2 Patches SVN URL Revision http://downloads.asterisk.org/pub/security/AST-2018-008-13.diff Asterisk 13 http://downloads.asterisk.org/pub/security/AST-2018-008-14.diff Asterisk 14 http://downloads.asterisk.org/pub/security/AST-2018-008-15.diff Asterisk 15 http://downloads.asterisk.org/pub/security/AST-2018-008-13.18.diff Certified Asterisk 13.18 http://downloads.asterisk.org/pub/security/AST-2018-008-13.21.diff Certified Asterisk 13.21 Links 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-2018-008.pdf and http://downloads.digium.com/pub/security/AST-2018-008.html Revision History Date Editor Revisions Made May 1, 2018 Richard Mudgett Initial revision June 11, 2018 Richard Mudgett Added Certified Asterisk 13.21 Asterisk Project Security Advisory - AST-2018-008 Copyright (C) 2018 Digium, Inc. All Rights Reserved. Permission is hereby granted to distribute and publish this advisory in its original, unaltered form. - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. 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On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBWyCQ6WaOgq3Tt24GAQh/6RAAsrkbQnZvVovC8h0i0gyX9ELjDPxuGkRW JcFzltxExtuNGlwLhAhO7hiBRa2ts3bbUmqAU9NJokrNXFDGcq4O55ytFxlrheof FbrbR2iLVnUCMfaF52zKk1qi2OjeYgjQs6qQCIP2xCLQ3Oe6FXbFdXZoToyWVrg5 ylRTsa8Jgu+DQcB+m1t1R9/tIN9OsJ+D1eb4W5m9FsBdPJM1Jo2khtb0Zou4kR3v CVtu839nfMWW1dlZxHC8r2TiK2upcH7VpnYgocXsYfxHRziQpbENTAGN9Q6BLP+L vHgOtPpFLXUVLBbvzSB07zUmpahfMmGLSOblEIw4g4u7JJU5cT2t7vwPolspwOnt v02r1Wh7IMc6+xKcSu51LOm+Ics8kwkPyLgeydNdXpMe85dUiSTrk5IP1kabeWzu ojEWfphbegylueQGsoNIoQwZ92ut/vyHEyOCnbbt2JwuCuX5Uqmi4TA8eS5WrAzb QjijwAWJqBIGZ+BLWFBZQuTejmU+v9H3LQqduCe3iC/jHPcJ//cJLQ+eNO8NtJ6B VRj3Ck2q+mD0fsx2WU7OVfhGkrZBq7ndKG9YVp/up6R3i0nB5I18JrJtf/o0rPml 4vVpqtYpK1+Cc+83lCSpeHEG7nmXJv4opEo879tTc/yTp4LhGAKCF1r2kLnJSUKF FwdiVTMuS5Y= =5XCy -----END PGP SIGNATURE-----