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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2007.0606 -- [UNIX/Linux] Asterisk - Remote crash vulnerability in Skinny channel driver 14 August 2007 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Asterisk Open Source 1.4.9 and prior AsteriskNOW beta6 and prior Asterisk Appliance Developer Kit 0.6.0 and prior s800i (Asterisk Appliance) 1.0.2 and prior Operating System: UNIX variants (UNIX, Linux, OSX) Impact: Denial of Service Access: Remote/Unauthenticated CVE Names: CVE-2007-4280 Original Bulletin: http://ftp.digium.com/pub/asa/ASA-2007-019.pdf Revision History: August 14 2007: CVE added August 9 2007: Initial Release - --------------------------BEGIN INCLUDED TEXT-------------------- Asterisk Project Security Advisory - ASA-2007-019 +------------------------------------------------------------------------+ | Product | Asterisk | |--------------------+---------------------------------------------------| | Summary | Remote crash vulnerability in Skinny channel | | | driver | |--------------------+---------------------------------------------------| | Nature of Advisory | Denial of Service | |--------------------+---------------------------------------------------| | Susceptibility | Remote Authenticated Sessions | |--------------------+---------------------------------------------------| | Severity | Moderate | |--------------------+---------------------------------------------------| | Exploits Known | No | |--------------------+---------------------------------------------------| | Reported On | August 7, 2007 | |--------------------+---------------------------------------------------| | Reported By | Wei Wang of McAfee AVERT Labs | |--------------------+---------------------------------------------------| | Posted On | August 7, 2007 | |--------------------+---------------------------------------------------| | Last Updated On | August 7, 2007 | |--------------------+---------------------------------------------------| | Advisory Contact | Jason Parker <jparker@digium.com> | |--------------------+---------------------------------------------------| | CVE Name | | +------------------------------------------------------------------------+ +------------------------------------------------------------------------+ | Description | The Asterisk Skinny channel driver, chan_skinny, has a | | | remotely exploitable crash vulnerability. A segfault can | | | occur when Asterisk receives a | | | "CAPABILITIES_RES_MESSAGE" packet where the capabilities | | | count is greater than the total number of items in the | | | capabilities_res_message array. Note that this requires | | | an authenticated session. | +------------------------------------------------------------------------+ +------------------------------------------------------------------------+ | Resolution | Asterisk code has been modified to limit the incoming | | | capabilities count. | | | | | | Users with configured Skinny devices should upgrade to | | | the appropriate version listed in the corrected in | | | section of this advisory. | +------------------------------------------------------------------------+ +------------------------------------------------------------------------+ | Affected Versions | |------------------------------------------------------------------------| | Product | Release | | | | Series | | |----------------------------------+-------------+-----------------------| | Asterisk Open Source | 1.0.x | Not affected | |----------------------------------+-------------+-----------------------| | Asterisk Open Source | 1.2.x | Not affected | |----------------------------------+-------------+-----------------------| | Asterisk Open Source | 1.4.x | All versions prior to | | | | 1.4.10 | |----------------------------------+-------------+-----------------------| | Asterisk Business Edition | A.x.x | Not affected | |----------------------------------+-------------+-----------------------| | Asterisk Business Edition | B.x.x | Not affected | |----------------------------------+-------------+-----------------------| | AsteriskNOW | pre-release | All versions prior to | | | | beta7 | |----------------------------------+-------------+-----------------------| | Asterisk Appliance Developer Kit | 0.x.x | All versions prior to | | | | 0.7.0 | |----------------------------------+-------------+-----------------------| | s800i (Asterisk Appliance) | 1.0.x | All versions prior to | | | | 1.0.3 | +------------------------------------------------------------------------+ +------------------------------------------------------------------------+ | Corrected In | |------------------------------------------------------------------------| | Product | Release | |---------------+--------------------------------------------------------| | Asterisk Open | 1.4.10, available from | | Source | http://downloads.digium.com/pub/telephony/asterisk | |---------------+--------------------------------------------------------| | AsteriskNOW | Beta7, available from http://www.asterisknow.org/. | | | Beta5 and Beta6 users can update using the system | | | update feature in the appliance control panel. | |---------------+--------------------------------------------------------| | Asterisk | 0.7.0, available from | | Appliance | http://downloads.digium.com/pub/telephony/aadk | | Developer Kit | | |---------------+--------------------------------------------------------| | s800i | 1.0.3 | | (Asterisk | | | Appliance) | | +------------------------------------------------------------------------+ +------------------------------------------------------------------------+ | 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/asa/ASA-2007-019.pdf and | | http://downloads.digium.com/pub/asa/ASA-2007-019.html. | +------------------------------------------------------------------------+ +------------------------------------------------------------------------+ | Revision History | |------------------------------------------------------------------------| | Date | Editor | Revisions Made | |--------------------+------------------------+--------------------------| | August 7, 2007 | jparker@digium.com | Initial Release | +------------------------------------------------------------------------+ Asterisk Project Security Advisory - ASA-2007-019 Copyright (c) 2007 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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Previous advisories and external security bulletins can be retrieved from: http://www.auscert.org.au/render.html?cid=1980 If you believe that your computer system has been compromised or attacked in any way, we encourage you to let us know by completing the secure National IT Incident Reporting Form at: http://www.auscert.org.au/render.html?it=3192 =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQCVAwUBRsFDLSh9+71yA2DNAQKjZwP/T7OteLStgoLK819LekEnA8frQW9rawYg L7htvuAUnfdIUaWu7c++QSQ3cLAdertNwRibjLAy9sSVhOqlAQIzdL++FHa87ZW+ FGzfnZHD1bAQfsQpygLvroXu5nJuzbCean/e1chI3PJDCbbLRJwYybO1pO/S3UqJ CIC4RVbapFs= =KfK5 -----END PGP SIGNATURE-----