SB2025120857 - Two DoS vulnerabilities in PowerDNS Recursor

Description

This security bulletin contains information about 2 vulnerabilities.

1) Input validation error (CVE-ID: CVE-2025-59030)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: 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

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.

2) Resource management error (CVE-ID: CVE-2025-59029)

CWE-ID: CWE-399 - Resource Management Errors

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green

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

The vulnerability exists due to improper management of internal resources in cache management when handling DNS queries with with qtype ANY. A remote attacker can send specially crafted request to the DNS server and perform a denial of service (DoS) attack.

Remediation

Install update from vendor's website.

References

• https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2025-08.html
• https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2025-07.html