CVE-2018-14644

low-risk
Published 2018-11-09

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.

Do I need to act?

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0.02% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.3/10 Medium
NETWORK / LOW complexity

Affected Products (1)

Affected Vendors

Powerdns

References (4)

Issue Tracking https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14644
Vendor Advisory https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2018-07...
Issue Tracking https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14644
Vendor Advisory https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2018-07...
26
/ 100
low-risk
Severity 21/34 · High
Exploitability 0/34 · Minimal
Exposure 5/34 · Minimal