CVE-2020-12244

NameCVE-2020-12244
DescriptionAn 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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
ReferencesDSA-4691-1
NVD severitymedium

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
pdns-recursor (PTS)jessie3.6.2-2+deb8u4vulnerable
jessie (security)3.6.2-2+deb8u3vulnerable
stretch4.0.4-1+deb9u4vulnerable
stretch (security)4.0.4-1+deb9u3vulnerable
buster4.1.11-1vulnerable
buster (security)4.1.11-1+deb10u1fixed
bullseye, sid4.3.1-1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
pdns-recursorsource(unstable)4.3.1-1
pdns-recursorsourcebuster4.1.11-1+deb10u1DSA-4691-1
pdns-recursorsourcestretch(unfixed)end-of-life

Notes

[stretch] - pdns-recursor <end-of-life> (No longer supported, see DSA 4691)
https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2020-02.html
https://www.openwall.com/lists/oss-security/2020/05/19/3

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