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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2014.0699 A defect in the prefetch feature can cause named to crash when handling some queries. 12 May 2014 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: BIND Publisher: ISC Operating System: UNIX variants (UNIX, Linux, OSX) Windows Impact/Access: Denial of Service -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2014-3214 Original Bulletin: https://kb.isc.org/article/AA-01161/0 - --------------------------BEGIN INCLUDED TEXT-------------------- A defect in the prefetch feature can cause named to crash when handling some queries. CVE: CVE-2014-3214 Document Version: 2.0 Posting date: 8 May 2014 Program Impacted: BIND Versions affected: 9.10.0 Severity: High Exploitable: Remotely Description: A defect in the pre-fetch feature (which is enabled by default) can cause BIND 9.10.0 to terminate with a "REQUIRE" assertion failure if it processes queries whose answers have particular attributes. This can be triggered as the result of normal query processing. Impact: Recursive nameservers are vulnerable to this defect. Authoritative-only servers are not at risk. On an affected nameserver, the assertion failure, if triggered, results in an immediate exit from named, denying service to clients attempting to query the recursive server. CVSS Score: 7.8 CVSS Vector: (AV:N/AC:L/Au:N/C:N/I:N/A:C) For more information on the Common Vulnerability Scoring System and to obtain your specific environmental score please visit: http://nvd.nist.gov/cvss.cfm?calculator&version=2&vector=(AV:N/AC:L/Au:N/C:N/I:N/A:C) Workarounds: The problematic code is bypassed and prefetching is disabled by setting the prefetch option to zero within the options block in named.conf: prefetch 0; Active exploits: There are no known active exploits but the crash has been independently reported by multiple organizations. Solution: Upgrade to the patched release listed below. BIND software can be downloaded from http://www.isc.org/downloads - BIND 9 version 9.10.0-P1 Acknowledgements: ISC would like to thank each of the individuals who independently discovered and reported the problem. Document Revision History: 1.0 Phase One, Advance Notification 7 May 2014 2.0 Phase Four, Public Disclosure: 8 May 2014 Related Documents: See our BIND Security Matrix ( https://kb.isc.org/article/AA-00913 ) for a complete listing of Security Vulnerabilities and versions affected. If you'd like more information on ISC product support please visit http://www.dns-co.com/solutions/. Do you still have questions? Questions regarding this advisory should go to security-officer@isc.org. To report a new issue, please encrypt your message using security-officer@isc.org's PGP key which can be found here: https://www.isc.org/downloads/software-support-policy/openpgp-key/. If you are unable to use encrypted email, you may also report new issues at: https://www.isc.org/mission/contact/. Note: ISC patches only currently supported versions. http://www.isc.org/downloads/software-support-policy/bind-software-status/ When possible we indicate EOL versions affected. ISC Security Vulnerability Disclosure Policy: Details of our current security advisory policy and practice can be found here: https://kb.isc.org/article/AA-00861/0 This Knowledge Base article https://kb.isc.org/editArticle/AA-01161 is the complete and official security advisory document. Legal Disclaimer: Internet Systems Consortium (ISC) is providing this notice on an "AS IS" basis. No warranty or guarantee of any kind is expressed in this notice and none should be implied. ISC expressly excludes and disclaims any warranties regarding this notice or materials referred to in this notice, including, without limitation, any implied warranty of merchantability, fitness for a particular purpose, absence of hidden defects, or of non-infringement. Your use or reliance on this notice or materials referred to in this notice is at your own risk. ISC may change this notice at any time. A stand-alone copy or paraphrase of the text of this document that omits the document URL is an uncontrolled copy. Uncontrolled copies may lack important information, be out of date, or contain factual errors. (c) 2001-2014 Internet Systems Consortium - --------------------------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 =========================================================================== 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 iQIVAwUBU3AHwhLndAQH1ShLAQIj1A//X0ebmmbRfdeUDhMLBxfAg2UNhvsknYHJ NrN8BieWZxiLtSMP4jP5hIPMLDvl1x2MyLmUnjfYe1EG+pZ3+OL270Z2gGV+it6m w8c6vfQ0QOM8qczJ3QJDX38G6kj6SlEz3HJrpUDqWMIqqSZKyd3XqKynobVghPHT TJcw0Z8/jvKRyKUd7WCtnYggTU9ihK8/4bn7wSL3267wHXHrbUvcmG0fVZW9odJs vdQ4Nhmo6kdLjZLYeI6G5tkPpyPb33MJg9mIGG9VAUyiGiNcVOSTCnx+mHp+5Ax2 lv73U/PrBRUpu2431C3VQ4SyKfpf49xBGKzeBYX5K+/1qD4z2YEKL0b/nGxvqxCm VsVF3Nd9cbILbqZGnmIuDL3SAJOizbXGZKFUp6OvzWvvxNc71BEEhmZcgE3oEL6f BpyAnRoNKcMTiUBCmO+vhermririekh2zj0rPx50Q5aC14XEfyiqw+D+Oa5ZnOup IfBIdFJMmLXN840dg2y9FwCqWKlVPe1l3h2u6bqoNL1YhMmhQA+POqP7ecnhywAe qIXPtiPryn2tvQUzmYCoI+d4GOXdIAbV1nAQA0ETOSfhmRHQb7hM2K4n9+UjHiOb Jz8ioIEHlDh8L9LivJgmaR0X/7TeIGZinhIOsSmFau8aZ5FnEQ32q8uP1DhDQncf aYk1J30GG2Y= =dAnu -----END PGP SIGNATURE-----