CVE-2023-26437

Deterred spoofing attempts can lead to authoritative servers being marked unavailable

Severity Score

5.3

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Track

*SSVC

Descriptions

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.

An update that fixes three vulnerabilities is now available. This update for pdns-recursor fixes the following issues.

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

Low

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

None

Integrity

None

Availability

Low

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:Track

Exploitation

None

Automatable

Tech. Impact

Partial

* Organization's Worst-case Scenario

Timeline

2023-02-22 CVE Reserved
2023-04-04 CVE Published
2025-02-13 CVE Updated
2025-04-15 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-400: Uncontrolled Resource Consumption

CAPEC

References (3)

URL	Tag	Source
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/CN7VMRYKZHG2UDUAK326LXD3JY7NO3LR
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/IHPD6SIQOG7245GXFQHPUEI4AZ6Y3KD6

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2023-02.html	2023-04-15

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Powerdns Search vendor "Powerdns"		Recursor Search vendor "Powerdns" for product "Recursor"				< 4.6.6 Search vendor "Powerdns" for product "Recursor" and version " < 4.6.6"		-		Affected
Powerdns Search vendor "Powerdns"		Recursor Search vendor "Powerdns" for product "Recursor"				>= 4.7.0 < 4.7.5 Search vendor "Powerdns" for product "Recursor" and version " >= 4.7.0 < 4.7.5"		-		Affected
Powerdns Search vendor "Powerdns"		Recursor Search vendor "Powerdns" for product "Recursor"				>= 4.8.0 < 4.8.4 Search vendor "Powerdns" for product "Recursor" and version " >= 4.8.0 < 4.8.4"		-		Affected