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CVE-2010-3614: Key algorithm rollover bug in bind9
Author: Cathy Almond Reference Number: AA-00936 Views: 6446 Created: 2013-05-23 23:03 Last Updated: 2013-05-23 23:03 0 Rating/ Voters
named (acting as DNSSEC validating resolver) could incorrectly mark zone data as insecure when the zone being queried is undergoing a key algorithm rollover.

Posting date: 
01 Dec 2010
Program Impacted: 
Versions affected: 
9.0.x to 9.7.2-P2, 9.4-ESV to 9.4-ESV-R3, 9.6-ESV to 9.6-ESV-R2


named, acting as a DNSSEC validator, was determining if an NS RRset is insecure based on a value that could mean either that the RRset is actually insecure or that there wasn't a matching key for the RRSIG in the DNSKEY RRset when resuming from validating the DNSKEY RRset.

This can happen when in the middle of a DNSKEY algorithm rollover, when two different algorithms were used to sign a zone but only the new set of keys are in the zone DNSKEY RRset.
See for example scenario.

Impact and Risk Assessment:

Answers are marked incorrectly as insecure.

CVSS Score:  5.0

CVSS Equation:  (AV:N/AC:L/Au:N/C:N/I:P/A:N)

For more information on the Common Vulnerability Scoring System and to obtain your specific environmental score please visit:



Active exploits:

None known at this time.


If you are running anything not listed below, upgrade as other versions are EOL and not being patched.
9.4: upgrade to 9.4-ESV-R4, or newer
9.6: upgrade to 9.6.2-P3 or 9.6-ESV-R3, or newer
9.7: upgrade to 9.7.2-P3

Document Revision History:

Nov24-Corrected/updated: Versions Affected, CVSS Base Score and Solution

Related Documents:

See our BIND Security Matrix for a complete listing of Security Vulnerabilities and versions affected.  

If you'd like more information on our Forum or product support please visit

Do you still have questions?  Questions regarding this advisory should go to

Note: ISC patches only currently supported versions. When possible we indicate EOL versions affected. 

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This Knowledge Base article is the complete and official security advisory document.

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