An issue has been found in PowerDNS Recursor from 4.0.0 up to and including 4.1.4. A remote attacker sending a DNS query for a meta-type like OPT can lead to a zone being wrongly cached as failing DNSSEC validation. It only arises if the parent zone is signed, and all the authoritative servers for that parent zone answer with FORMERR to a query for at least one of the meta-types. As a result, subsequent queries from clients requesting DNSSEC validation will be answered with a ServFail.
Created pdns tracking bugs for this issue:
Affects: epel-all [bug 1648382]
Affects: fedora-all [bug 1648380]
Created pdns-recursor tracking bugs for this issue:
Affects: epel-all [bug 1649046]
Affects: fedora-all [bug 1649045]
This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.