CVE-2023-26437 : Denial of service vulnerability in PowerDNS Recursor allows authoritative server

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.

Published 2023-04-04 15:15:09

Updated 2025-02-13 17:16:12

Source Open-Xchange

View at NVD, CVE.org

Vulnerability category: Denial of service

Products affected by CVE-2023-26437

Powerdns » Recursor
Versions from including (>=) 4.8.0 and before (<) 4.8.4
cpe:2.3:a:powerdns:recursor:*:*:*:*:*:*:*:*
Matching versions
Powerdns » Recursor
Versions from including (>=) 4.7.0 and before (<) 4.7.5
cpe:2.3:a:powerdns:recursor:*:*:*:*:*:*:*:*
Matching versions
Powerdns » Recursor
Versions before (<) 4.6.6
cpe:2.3:a:powerdns:recursor:*:*:*:*:*:*:*:*
Matching versions

Threat overview for CVE-2023-26437

Top countries where our scanners detected CVE-2023-26437

Top open port discovered on systems with this issue 53

IPs affected by CVE-2023-26437 4,123

Threat actors abusing to this issue? Yes

Find out if you^* are affected by CVE-2023-26437!

^*Directly or indirectly through your vendors, service providers and 3rd parties. Powered by attack surface intelligence from SecurityScorecard.

Exploit prediction scoring system (EPSS) score for CVE-2023-26437

EPSS FAQ

0.00%

Probability of exploitation activity in the next 30 days EPSS Score History

~ %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2023-26437

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
5.3	MEDIUM	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L	3.9	1.4	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: None Integrity: None Availability: Low
3.4	LOW	CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:N/I:N/A:L	1.6	1.4	Open-Xchange
Attack Vector: Network Attack Complexity: High Privileges Required: None User Interaction: Required Scope: Changed Confidentiality: None Integrity: None Availability: Low

CWE ids for CVE-2023-26437

CWE-400 Uncontrolled Resource Consumption

The product does not properly control the allocation and maintenance of a limited resource.

Assigned by: 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary)

References for CVE-2023-26437

https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2023-02.html

PowerDNS Security Advisory 2023-02: Deterred spoofing attempts can lead to authoritative servers being marked unavailable — PowerDNS Recursor documentation
Vendor Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/IHPD6SIQOG7245GXFQHPUEI4AZ6Y3KD6/

[SECURITY] Fedora 38 Update: pdns-recursor-4.8.4-1.fc38 - package-announce - Fedora Mailing-Lists
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/CN7VMRYKZHG2UDUAK326LXD3JY7NO3LR/

[SECURITY] Fedora 37 Update: pdns-recursor-4.8.4-1.fc37 - package-announce - Fedora Mailing-Lists