Original

Internet Systems Consortium (ISC) が提供する BIND named には、特定の状況下で、ゾーンデータの状態を insecure としてしまう脆弱性が存在します。 ISC から以下の脆弱性情報が公開されています。 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.