An incorrect boundary check in
A server which encounters this error will terminate due to a REQUIRE assertion failure, resulting in denial of service to clients.
Recursive servers are at greatest risk from this defect but some circumstances may exist in which the attack can be successfully exploited against an authoritative server. Servers should be upgraded to a fixed version.
CVSS Score: 7.1
CVSS Vector: (AV:N/AC:M/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&adv&version=2&vector=(AV:N/AC:M/Au:N/C:N/I:N/A:C)
No workarounds are known to exist.
Upgrade to the patched release most closely related to your current version of BIND. These can all be downloaded from http://www.isc.org/downloads.
- BIND 9 version 9.9.7-P3
- BIND 9 version 9.10.2-P4
BIND development releases scheduled to be published at the same time as the public disclosure of this vulnerability will also contain the fix for this security issue.
- BIND 9 version 9.9.8rc1
- BIND 9 version 9.10.3rc1
Document Revision History:
1.0 Advance Notification 19 August, 2015
2.0 Public Disclosure 2 September, 2015
See our BIND9 Security Vulnerability Matrix at 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 Subscription Support and Advance Security Notifications, please visit http://www.isc.org/support/.
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 http://www.isc.org/downloads/).
ISC Security Vulnerability Disclosure Policy: Details of our current security advisory policy and practice can be found here: https://kb.isc.org/article/AA-00861/164/ISC-Software-Defect-and-Security-Vulnerability-Disclosure-Policy.html
This Knowledge Base article https://kb.isc.org/article/AA-01291 is the complete and official security advisory document.
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