Remote denial of service in PowerDNS Recursor

1) Buffer Over-read

EUVDB-ID: #VU107086

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-2025-30195

CWE-ID: CWE-126 - Buffer over-read

Exploit availability: No

Description

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

The vulnerability exists due to an error when processing and cashing specific Resource Record Sets. A remote attacker can publish a zone containing specially crafted Resource Record Sets, trigger illegal memory access and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

PowerDNS Recursor: 5.2.0 - 5.2.0 rc1

CPE2.3

• cpe:2.3:a:powerdns_com_b_v:powerdns_recursor:5.2.0:*:*:*:*:*:*:*
• cpe:2.3:a:powerdns_com_b_v:powerdns_recursor:5.2.0:alpha1:*:*:*:*:*:*
• cpe:2.3:a:powerdns_com_b_v:powerdns_recursor:5.2.0:beta1:*:*:*:*:*:*
• cpe:2.3:a:powerdns_com_b_v:powerdns_recursor:5.2.0:rc1:*:*:*:*:*:*

External links

https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2025-01.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.