CVE-2019-3806

Severity: high (CVSS 8.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2019-01-29 · updated 2026-06-17
Weakness: CWE-358

Description

An issue has been found in PowerDNS Recursor versions after 4.1.3 before 4.1.9 where Lua hooks are not properly applied to queries received over TCP in some specific combination of settings, possibly bypassing security policies enforced using Lua.

Affected products

PowerDNS Recursor: from 4.1.4 before 4.1.9 — fixed in 4.1.9

How to fix

Upgrade to a fixed version: PowerDNS Recursor 4.1.9. Check the vendor advisory for mitigations.

References

https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3806
https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2019-01.html
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3806
https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2019-01.html

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