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CERT Coordination Center

ISC BIND named validator vulnerability

Vulnerability Note VU#837744

Original Release Date: 2010-12-01 | Last Revised: 2010-12-01


ISC BIND named contains a vulnerability where under certain situations it could incorrectly mark zone data as insecure.


According to ISC:

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.


Answers are marked incorrectly as insecure.


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Users who obtain BIND from a third-party vendor, such as their operating system vendor, should see the vendor information portion of this document for a partial list of affected vendors.

This vulnerability is addressed in ISC BIND versions 9.4-ESV-R4, 9.6.2-P3 or 9.6-ESV-R3, and 9.7.2-P3. Users of BIND from the original source distribution should upgrade to one of these versions, as appropriate.

See also

Vendor Information


Internet Systems Consortium Affected

Updated:  December 01, 2010



Vendor Statement

We have not received a statement from the vendor.

Vendor Information

We are not aware of further vendor information regarding this vulnerability.

Vendor References

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Thanks to Internet Systems Consortium for reporting this vulnerability.

This document was written by Michael Orlando.

Other Information

CVE IDs: CVE-2010-3614
Severity Metric: 7.65
Date Public: 2010-12-01
Date First Published: 2010-12-01
Date Last Updated: 2010-12-01 21:33 UTC
Document Revision: 17

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