CVE-2020-12662

NameCVE-2020-12662
DescriptionUnbound before 1.10.1 has Insufficient Control of Network Message Volume, aka an "NXNSAttack" issue. This is triggered by random subdomains in the NSDNAME in NS records.
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-4694-1
NVD severitymedium

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
unbound (PTS)jessie1.4.22-3+deb8u3vulnerable
jessie (security)1.4.22-3+deb8u4vulnerable
stretch1.6.0-3+deb9u2vulnerable
buster1.9.0-2+deb10u1vulnerable
buster (security)1.9.0-2+deb10u2fixed
bullseye, sid1.10.1-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
unboundsource(unstable)1.10.1-1
unboundsourcebuster1.9.0-2+deb10u2DSA-4694-1
unboundsourcestretch(unfixed)end-of-life

Notes

[stretch] - unbound <end-of-life> (No longer supported, see DSA 4694)
https://nlnetlabs.nl/downloads/unbound/CVE-2020-12662_2020-12663.txt
Patch: https://nlnetlabs.nl/downloads/unbound/patch_cve_2020-12662_2020-12663.diff

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