FreeBSD VuXML: Documenting security issues in FreeBSD and the FreeBSD Ports Collection

powerdns-recursor -- Multiple vulnerabilities

Affected packages
powerdns-recursor < 4.1.7
powerdns-recursor40 < 4.0.9


VuXML ID e9aa0e4c-ea8b-11e8-a5b7-00e04c1ea73d
Discovery 2018-11-06
Entry 2018-11-17
Modified 2018-11-19

powerdns Team reports:

CVE-2018-10851: An issue has been found in PowerDNS Recursor allowing a malicious authoritative server to cause a memory leak by sending specially crafted records. The issue is due to the fact that some memory is allocated before the parsing and is not always properly released if the record is malformed. When the PowerDNS Recursor is run inside a supervisor like supervisord or systemd, an out-of-memory crash will lead to an automatic restart, limiting the impact to a somewhat degraded service.

CVE-2018-14626: An issue has been found in PowerDNS Recursor allowing a remote user to craft a DNS query that will cause an answer without DNSSEC records to be inserted into the packet cache and be returned to clients asking for DNSSEC records, thus hiding the presence of DNSSEC signatures for a specific qname and qtype. For a DNSSEC-signed domain, this means that clients performing DNSSEC validation by themselves might consider the answer to be bogus until it expires from the packet cache, leading to a denial of service.

CVE-2018-14644: An issue has been found in PowerDNS Recursor where 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.


CVE Name CVE-2018-10851
CVE Name CVE-2018-14626
CVE Name CVE-2018-14644