#VU61631 Input validation error in PowerDNS Recursor and PowerDNS Authoritative - CVE-2022-27227

Vulnerability identifier: #VU61631

Vulnerability risk: Low

CVSSv4.0: 1.7 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2022-27227

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
PowerDNS Recursor
Server applications / DNS servers
PowerDNS Authoritative
Server applications / DNS servers

Vendor: PowerDNS.COM B.V.

Description

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

The vulnerability exists due to insufficient validation of an incoming IXFR transfer. A remote attacker can pass specially crafted input to the server and cause incomplete zone transfer to be handled as successful transfers.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

PowerDNS Recursor: 4.0.0 alpha1 - 4.0.9, 4.1.0 rc1 - 4.1.18, 4.2.0 rc1 - 4.2.5, 4.3.0 rc1 - 4.3.7, 4.4.0 alpha1 - 4.4.7, 4.5.0 rc1 - 4.5.7, 4.6.0 alpha1 - 4.6.0, 4.7.0 alpha1

PowerDNS Authoritative: 4.0.0 - 4.0.9, 4.1.0 - 4.1.14, 4.2.0 - 4.2.3, 4.3.0 - 4.3.2, 4.4.0 - 4.4.2, 4.5.0 - 4.5.3, 4.6.0

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External links
https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2022-01.html
https://doc.powerdns.com/authoritative/security-advisories/powerdns-advisory-2022-01.html
https://docs.powerdns.com/recursor/security-advisories/index.html
https://doc.powerdns.com/authoritative/security-advisories/index.html
https://www.openwall.com/lists/oss-security/2022/03/25/1

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Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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