CVE-2021-36754

HIGHNuclei

powerdns authoritative_server Improper Restriction of Operations within the Bounds of a Memory Buffer

Title source: VulnCheck
STIX 2.1 vulnerability

Record summary

CVE-2021-36754 has a selected CVSS score of 7.5 (high); EIP currently links 1 Nuclei template.

Description

PowerDNS Authoritative Server 4.5.0 before 4.5.1 allows anybody to crash the process by sending a specific query (QTYPE 65535) that causes an out-of-bounds exception.

Description source: CVE List

Exploitation context

Known exploitation

VulnCheck KEV
Listed · Oct 20, 2025 · VulnCheck
Reported exploitation
Observed · VulnCheck

Available material

Nuclei templates
1

Affected products and versions

1
ProductSourceVersion range

authoritative_server

Browse powerdns / authoritative_server
VulnCheckVersion data not supplied

Nuclei templates

1
ProjectDiscoveryHIGHPowerDNS Authoritative Server - Denial of ServiceCVSS 7.5

PowerDNS Authoritative Server 4.5.0 before 4.5.1 allows anybody to crash the process by sending a specific query (QTYPE 65535) that causes an out-of-bounds exception.

Impact

Attackers can crash the server process, leading to denial of service and potential service disruption.

Remediation

Upgrade to version 4.5.1 or later.

WeaknessesCWE-119
Authorsdaffainfo
Template tagscvecve2021jsdnspowerdnsauthoritative_serverdosintrusivevkev
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CPE: cpe:2.3:a:powerdns:authoritative_server:*:*:*:*:*:*:*:*
http://www.openwall.com/lists/oss-security/2021/07/26/2 https://doc.powerdns.com/authoritative/security-advisories/powerdns-advisory-2021-01.html https://nvd.nist.gov/vuln/detail/CVE-2021-36754

Source: ProjectDiscovery

References

4