What’s Vulnerable › Vulnerabilities

CVE-2020-12244

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-05-19 · updated 2026-06-17
• Weakness: CWE-347

Description

An issue has been found in PowerDNS Recursor 4.1.0 through 4.3.0 where records in the answer section of a NXDOMAIN response lacking an SOA were not properly validated in SyncRes::processAnswer, allowing an attacker to bypass DNSSEC validation.

Affected products

• Debian Linux: 10.0
• Fedoraproject Fedora: 31, 32
• openSUSE Backports Sle: 15.0-sp1
• openSUSE Leap: 15.1
• PowerDNS Recursor: from 4.1.0 through 4.3.0

References

• http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00052.html
• http://www.openwall.com/lists/oss-security/2020/05/19/3
• https://doc.powerdns.com/recursor/security-advisories/powerdns-advisory-2020-02.html
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NMP72NJGKBWR5WEBXAWX5KSLQUDFTG6S/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PS4ZN5XGENYNFKX7QIIOUCQQHXE37GJF/
• https://www.debian.org/security/2020/dsa-4691
• http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00052.html
• http://www.openwall.com/lists/oss-security/2020/05/19/3
• https://doc.powerdns.com/recursor/security-advisories/powerdns-advisory-2020-02.html
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NMP72NJGKBWR5WEBXAWX5KSLQUDFTG6S/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PS4ZN5XGENYNFKX7QIIOUCQQHXE37GJF/
• https://www.debian.org/security/2020/dsa-4691

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