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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2008.0001 -- [UNIX/Linux][Appliance] Asterisk Remote Crash Vulnerability in SIP channel driver 3 January 2008 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Asterisk Publisher: Digium Operating System: UNIX variants (UNIX, Linux, OSX) Impact: Denial of Service Access: Remote/Unauthenticated Original Bulletin: http://downloads.digium.com/pub/security/AST-2008-001.html - --------------------------BEGIN INCLUDED TEXT-------------------- Asterisk Project Security Advisory - AST-2008-001 +------------------------------------------------------------------------+ | Product | Asterisk | |---------------------+--------------------------------------------------| | Summary | Remote Crash Vulnerability in SIP channel driver | |---------------------+--------------------------------------------------| | Nature of Advisory | Denial of Service | |---------------------+--------------------------------------------------| | Susceptibility | Remote Unauthenticated Sessions | |---------------------+--------------------------------------------------| | Severity | Critical | |---------------------+--------------------------------------------------| | Exploits Known | No | |---------------------+--------------------------------------------------| | Reported On | December 26, 2007 | |---------------------+--------------------------------------------------| | Reported By | Grey VoIP (bugs.digium.com user greyvoip) | |---------------------+--------------------------------------------------| | Posted On | January 2, 2008 | |---------------------+--------------------------------------------------| | Last Updated On | January 2, 2008 | |---------------------+--------------------------------------------------| | Advisory Contact | Joshua Colp <jcolp@digium.com> | |---------------------+--------------------------------------------------| | CVE Name | | +------------------------------------------------------------------------+ +------------------------------------------------------------------------+ | Description | The handling of the BYE with Also transfer method was | | | broken during the development of Asterisk 1.4. If a | | | transfer attempt is made using this method the system | | | will immediately crash upon handling the BYE message due | | | to trying to copy data into a NULL pointer. It is | | | important to note that a dialog must have already been | | | established and up in order for this to happen. | +------------------------------------------------------------------------+ +------------------------------------------------------------------------+ | Resolution | A fix has been added so that the BYE with Also transfer | | | method now properly allocates and uses the transfer data | | | structure. It will no longer try to copy data into a NULL | | | pointer and will operate properly. | +------------------------------------------------------------------------+ +------------------------------------------------------------------------+ | Affected Versions | |------------------------------------------------------------------------| | Product | Release | | | | Series | | |----------------------------+-------------+-----------------------------| | Asterisk Open Source | 1.0.x | Unaffected | |----------------------------+-------------+-----------------------------| | Asterisk Open Source | 1.2.x | Unaffected | |----------------------------+-------------+-----------------------------| | Asterisk Open Source | 1.4.x | All versions prior to | | | | 1.4.17 | |----------------------------+-------------+-----------------------------| | Asterisk Business Edition | A.x.x | Unaffected | |----------------------------+-------------+-----------------------------| | Asterisk Business Edition | B.x.x | Unaffected | |----------------------------+-------------+-----------------------------| | Asterisk Business Edition | C.x.x | All versions prior to | | | | C.1.0-beta8 | |----------------------------+-------------+-----------------------------| | AsteriskNOW | pre-release | All versions prior to beta7 | |----------------------------+-------------+-----------------------------| | Asterisk Appliance | SVN | All versions prior to | | Developer Kit | | Asterisk 1.4 revision 95946 | |----------------------------+-------------+-----------------------------| | s800i (Asterisk Appliance) | 1.0.x | All versions prior to | | | | 1.0.3.4 | +------------------------------------------------------------------------+ +------------------------------------------------------------------------+ | Corrected In | |------------------------------------------------------------------------| | Product | Release | |---------------+--------------------------------------------------------| | Asterisk Open | 1.4.17, available from | | Source | http://downloads.digium.com/pub/telephony/asterisk | |---------------+--------------------------------------------------------| | Asterisk | C.1.0 | | Business | | | Edition | | |---------------+--------------------------------------------------------| | 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 | Asterisk 1.4 revision 95946. Available by performing | | Appliance | an svn update of the AADK tree. | | Developer Kit | | |---------------+--------------------------------------------------------| | s800i | 1.0.3.4 | | (Asterisk | | | Appliance) | | +------------------------------------------------------------------------+ +------------------------------------------------------------------------+ | Links | http://bugs.digium.com/view.php?id=11637 | +------------------------------------------------------------------------+ +------------------------------------------------------------------------+ | 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-2008-001.pdf and | | http://downloads.digium.com/pub/security/AST-2008-001.html | +------------------------------------------------------------------------+ +------------------------------------------------------------------------+ | Revision History | |------------------------------------------------------------------------| | Date | Editor | Revisions Made | |------------------+--------------------+--------------------------------| | 2008-01-02 | Joshua Colp | Initial Release | +------------------------------------------------------------------------+ Asterisk Project Security Advisory - AST-2008-001 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 iQCVAwUBR3wxZSh9+71yA2DNAQKQowP/WA4yElr1yl1sBoPUPQUZskS1DwNK/HJO r3OYzpUXzgTegCLz/kDLQtBs+nmR89VwrE/ro86Pe8noYAXoYnlGfEjtl8xlBuvz POgm9FV/NczphEnq/JT6Wq1rHcH7l9XgT/Y4kFnC/GQSFdzWzUHas559SwkvKD0K tlT83XYPxxo= =3JpH -----END PGP SIGNATURE-----