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Vulnerability · Published Apr 4, 2023 · Assigned by OX

CVE-2023-26437Deterred spoofing attempts can lead to authoritative servers being marked unavailable

Low 3.4

In plain English

A low-severity uncontrolled resource consumption in Recursor from PowerDNS. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 49% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)3.4Low
Exploit odds (30 days)0.6%top 51.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

Denial of service vulnerability in PowerDNS Recursor allows authoritative servers to be marked unavailable.This issue affects Recursor: through 4.6.5, through 4.7.4 , through 4.8.3.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12pdns-recursor4.8.4-1DEBIAN-CVE-2023-26437
Debian:13pdns-recursor4.8.4-1DEBIAN-CVE-2023-26437
Debian:14pdns-recursor4.8.4-1DEBIAN-CVE-2023-26437
Ubuntu:24.04:LTSpdns-recursorno fix listedUBUNTU-CVE-2023-26437
Ubuntu:25.10pdns-recursorno fix listedUBUNTU-CVE-2023-26437
Ubuntu:26.04:LTSpdns-recursorno fix listedUBUNTU-CVE-2023-26437
Ubuntu:26.10pdns-recursorno fix listedUBUNTU-CVE-2023-26437

Affected products (as reported)

VendorProductVersions
PowerDNS Recursor 0 – through 4.6.50 – through 4.7.40 – through 4.8.3

Weakness: CWE-400 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:N/I:N/A:L

References