Powerdns: >> Recursor Security Vulnerabilities
An RPZ sent by a malicious authoritative server can result in a null pointer dereference, caused by a missing consistency check and leading to a denial of service.
CVSS Score
4.4
EPSS Score
0.0
Published
2026-04-22
If you use the zoneToCache function with a malicious authoritative server, an attacker can send a zone that result in a null pointer dereference, caused by a missing consistency check and leading to a denial of service.
CVSS Score
4.4
EPSS Score
0.0
Published
2026-04-22
An attacker can send a web request that causes unlimited memory allocation in the internal web server, leading to a denial of service. The internal web server is disabled by default.
CVSS Score
5.3
EPSS Score
0.0
Published
2026-04-22
An attacker can send a web request that causes unlimited memory allocation in the internal web server, leading to a denial of service. The internal web server is disabled by default.
CVSS Score
5.3
EPSS Score
0.0
Published
2026-04-22
By publishing and querying a crafted zone an attacker can cause allocation of large entries in the negative and aggressive NSEC(3) caches.
CVSS Score
5.3
EPSS Score
0.0
Published
2026-04-22
Having many concurrent transfers of the same RPZ can lead to inconsistent RPZ data, use after free and/or a crash of the recursor. Normally concurrent transfers of the same RPZ zone can only occur with a malfunctioning RPZ provider.
CVSS Score
5.0
EPSS Score
0.0
Published
2026-04-22
An attacker can send a web request that causes unlimited memory allocation in the internal web server, leading to a denial of service. The internal web server is disabled by default.
CVSS Score
5.3
EPSS Score
0.0
Published
2026-04-22
A zone transition from NSEC to NSEC3 might trigger an internal inconsistency and cause a denial of service.
CVSS Score
5.9
EPSS Score
0.0
Published
2026-04-22
An attacker can send replies that result in a null pointer dereference, caused by a missing consistency check and leading to a denial of service. Cookies are disabled by default.
CVSS Score
5.9
EPSS Score
0.0
Published
2026-04-22
Crafted zones can lead to increased resource usage and crafted CNAME chains can lead to cache poisoning in Recursor.
CVSS Score
5.3
EPSS Score
0.0
Published
2026-02-09
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