Two DoS vulnerabilities in PowerDNS Recursor

Published: 2025-12-08

Risk	Medium
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2025-59030 CVE-2025-59029
CWE-ID	CWE-20 CWE-399
Exploitation vector	Network
Public exploit	N/A
Vulnerable software	PowerDNS Recursor Server applications / DNS servers
Vendor	PowerDNS.COM B.V.

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Input validation error

EUVDB-ID: #VU119298

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2025-59030

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of incoming notifies over TCP. A remote attacker can send specially crafted requests to the DNS server and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

PowerDNS Recursor: 5.0.0 alpha1 - 5.3.1

CPE2.3

External links

https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2025-08.html

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Resource management error

EUVDB-ID: #VU119296