CVE-2020-12663: nlnetlabs unbound – CVSS 7.5 · Watchpost

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CVE-2020-12663

HIGH 7.5CVE-2020-12663 · Published 19/05/2020 · updated 17/06/2026

In short

CVE-2020-12663 is a HIGH (CVSS 7.5) vulnerability affecting unbound (nlnetlabs).
Chance of exploitation in the next 30 days (EPSS): 3.6%, higher than 89.4% of all vulnerabilities.
Fix: update to 1.10.1 or later.

Package	Affected versions	Patched versions
unbound nlnetlabs	`< 1.10.1`	`1.10.1`

Description

Unbound before 1.10.1 has an infinite loop via malformed DNS answers received from upstream servers.

References

lists.opensuse.org/opensuse-security-announce/2020-06/msg00067.html · Mailing List
lists.opensuse.org/opensuse-security-announce/2020-06/msg00069.html · Mailing List
openwall.com/lists/oss-security/2020/05/19/5 · Mailing List
lists.debian.org/debian-lts-announce/2021/02/msg00017.html · Mailing List
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/F5NFROI2OMCZLYRTCNGHGO3TUD32LCIQ
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YJ42N2HBZ3DXMSEC56SWIIOFQGOS5M7I
nlnetlabs.nl/downloads/unbound/CVE-2020-12662_2020-12663.txt · Vendor Advisory
security.freebsd.org/advisories/FreeBSD-SA-20:19.unbound.asc · Third Party Advisory
usn.ubuntu.com/4374-1 · Third Party Advisory
debian.org/security/2020/dsa-4694 · Third Party Advisory

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