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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2013.0458 Asterisk Project Security Advisory - AST-2013-001 2 April 2013 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Asterisk Open Source Publisher: Digium Operating System: Windows UNIX variants (UNIX, Linux, OSX) Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2013-2685 Original Bulletin: http://downloads.digium.com/pub/security/AST-2013-001.html - --------------------------BEGIN INCLUDED TEXT-------------------- Asterisk Project Security Advisory - AST-2013-001 Product Asterisk Summary Buffer Overflow Exploit Through SIP SDP Header Nature of Advisory Exploitable Stack Buffer Overflow Susceptibility Remote Unauthenticated Sessions Severity Major Exploits Known No Reported On 6 January, 2013 Reported By Ulf Ha:rnhammar Posted On 27 March, 2013 Last Updated On March 27, 2013 Advisory Contact Jonathan Rose <jrose AT digium DOT com> CVE Name CVE-2013-2685 Description The format attribute resource for h264 video performs an unsafe read against a media attribute when parsing the SDP. The vulnerable parameter can be received as strings of an arbitrary length and Asterisk attempts to read them into limited buffer spaces without applying a limit to the number of characters read. If a message is formed improperly, this could lead to an attacker being able to execute arbitrary code remotely. Resolution Attempts to read string data into the buffers noted are now explicitly limited by the size of the buffers. Affected Versions Product Release Series Asterisk Open Source 11.x All Versions Corrected In Product Release Asterisk Open Source 11.2.2 Patches SVN URL Revision Http://downloads.asterisk.org/pub/security/AST-2013-001-11.diff Asterisk 11 Links https://issues.asterisk.org/jira/browse/ASTERISK-20901 Asterisk Project Security Advisories are posted at http://www.asterisk.org/security This document may be superseded by later versions; if so, the latest version will be posted at http://downloads.digium.com/pub/security/AST-2013-001.pdf and http://downloads.digium.com/pub/security/AST-2013-001.html Revision History Date Editor Revisions Made February 11, 2013 Jonathan Rose Initial Draft March 27, 2013 Matt Jordan CVE Added Asterisk Project Security Advisory - AST-2013-001 Copyright (c) 2013 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 iQIVAwUBUVpFiO4yVqjM2NGpAQL8FA/+KFX7ffZSEaoIFpIEfzzfqyaSw04d/iHo qoL9L0sufIKjFAHSsREleJtkQYUNAyqbLFgh7RSB8c/q8441sxr5RFXGgMH+uL5C NcnuogHEeODoU0UrgKcNb34hP/CcVSds8c8ExETF3yBTDEdyY89M0jnnPjVBfGf6 fPtdiBZkdA1IZ5kNdPGS/wMFNDdUwtAEFR5PalQgUfxj4/VSLJ2N3acwq80Fb5gz NP1SN9FBLICeWTwrUh/kFkXgOtma2lj+Uu7bvjP1Z2VKlGXbIlqgsRGYy67p9zj0 31hdumD63ZGjjW2UYVZ8Vv6Xpaf6B8s+NGQiQ6YdBmNm2BNJ9T/ZxGvemTXNvyT7 w+s1eCoBWe0OAUnRSi3D7TVmc5iAHKO8uMg/QrtiQO9GMV9hyN/vFve0qh+OViMS 9zV7by+y7bjooAqosULD0FHQ6Jy5PmfpxLdNZU9B7uGkn3OF0GyJsOuzZqbYJjVz CxvDnZAv9kHjibWJ0BL4pXfX4Ikx12vifESxE3KX++AVNN+k3paDj52PM7P9Gqor 1WnQNOGvTypIEa+kt/ccyn0sM1Rjv0qbnovkv5QlxtLyM9tLz+JAeBDxyFZJfaBP +pXXVsjt+YzGudA6A20yZ3fvP4mXW5oq5NWqOwjQabLWg/UbS7yDa+uXY/Gn5iQR JicK43b/DpA= =K+Zz -----END PGP SIGNATURE-----