CVE-2014-3214: A Defect in Prefetch Can Cause Recursive Servers to Crash
A defect in the prefetch feature can cause named to crash when handling some queries.
Document version: 2.0
Posting date: 8 May 2014
Program impacted: BIND
Versions affected: 9.10.0
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.
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
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 https://www.isc.org/downloads
- BIND 9 version 9.10.0-P1
Document Revision History:
1.0 Phase One, Advance Notification, 7 May 2014
2.0 Phase Four, Public Disclosure, 8 May 2014
If you'd like more information on ISC Subscription Support and Advance Security Notifications, please visit https://www.isc.org/support/.
See our BIND 9 Security Vulnerability Matrix for a complete listing of security vulnerabilities and versions affected.
Do you still have questions? Questions regarding this advisory should go to email@example.com. To report a new issue, please encrypt your message using firstname.lastname@example.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/community/report-bug/.
Note: ISC patches only currently supported versions. When possible, we indicate EOL versions affected. (For current information on which versions are actively supported, please see https://www.isc.org/downloads/.)
ISC Security Vulnerability Disclosure Policy: Details of our current security advisory policy and practice can be found in the ISC Software Defect and Security Vulnerability Disclosure Policy.
This Knowledgebase article 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.