Improper input validation in Powerdns Recursor
CVE-2018-14644
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.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
EPSS: 0.048 (91.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
Affected products
- Powerdns Recursor
- [Unknown] Pdns — versions 4.1.5, 4.0.9
Weakness classification (CWE)
References
- secalert@redhat.com (x_refsource_CONFIRM, Vendor Advisory)
- secalert@redhat.com (x_refsource_CONFIRM, Third Party Advisory, Issue Tracking)
Frequently asked questions
- What is CVE-2018-14644?
- CVE-2018-14644 is a medium-severity vulnerability in Powerdns Recursor, classified under Improper Input Validation. CVSS score: 5.3/10. Published 2018-11-09.
- How severe is CVE-2018-14644?
- Medium severity. CVSS v3 base score is 5.3 out of 10.