CVE catalog

CVE-2020-10772

unbound: CVE-2020-10772

Severity: High · CVSS 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published: Jun 10, 2020, 12:00:00 AM UTC
Source: [NVD] · [CVE record]
EPSS: 1.35% · Oct 25, 2026

An incomplete fix for CVE-2020-12662 was shipped for Unbound in Red Hat Enterprise Linux 7, as part of erratum RHSA-2020:2414. Vulnerable versions of Unbound could still amplify an incoming query into a large number of queries directed to a target, even with a lower amplification ratio compared to versions of Unbound that shipped before the mentioned erratum. This issue is about the incomplete fix for CVE-2020-12662, and it does not affect upstream versions of Unbound.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	unbound	sid	`1.26.2-1`	not affected
Debian	unbound	forky	`1.26.2-1`	not affected
Debian	unbound	trixie	`1.22.0-2+deb13u3`	not affected
Debian	unbound	trixie-security	`1.26.2-0+deb13u1`	not affected
Debian	unbound	bookworm	`1.17.1-2+deb12u4`	not affected
Debian	unbound	bookworm-security	`1.17.1-2+deb12u3`	not affected

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	unbound	source	sid	`Not affected`	unimportant	Not reported	Not reported
Debian	unbound	source	forky	`Not affected`	unimportant	Not reported	Not reported
Debian	unbound	source	trixie	`Not affected`	unimportant	Not reported	Not reported
Debian	unbound	source	bookworm	`Not affected`	unimportant	Not reported	Not reported

OpenFactory catalog packages

Matching against OpenFactory catalog package versions is in progress.

[Debian 12 (Bookworm)]

[libunbound8]Unknown
Source package: [unbound]
Details (4)
- 1.17.1-2+deb12u4 · amd64 · bookworm
  Not affected
  dsa · unbound · debian · bookworm
- 1.17.1-2+deb12u4 · arm64 · bookworm
  Not affected
  dsa · unbound · debian · bookworm
- 1.17.1-2+deb12u3 · amd64 · bookworm-security
  Not affected
  dsa · unbound · debian · bookworm
- 1.17.1-2+deb12u3 · arm64 · bookworm-security
  Not affected
  dsa · unbound · debian · bookworm
[libunbound-dev]Unknown
Source package: [unbound]
Details (4)
- 1.17.1-2+deb12u4 · amd64 · bookworm
  Not affected
  dsa · unbound · debian · bookworm
- 1.17.1-2+deb12u4 · arm64 · bookworm
  Not affected
  dsa · unbound · debian · bookworm
- 1.17.1-2+deb12u3 · amd64 · bookworm-security
  Not affected
  dsa · unbound · debian · bookworm
- 1.17.1-2+deb12u3 · arm64 · bookworm-security
  Not affected
  dsa · unbound · debian · bookworm
[python3-unbound]Unknown
Source package: [unbound]
Details (4)
- 1.17.1-2+deb12u4 · amd64 · bookworm
  Not affected
  dsa · unbound · debian · bookworm
- 1.17.1-2+deb12u4 · arm64 · bookworm
  Not affected
  dsa · unbound · debian · bookworm
- 1.17.1-2+deb12u3 · amd64 · bookworm-security
  Not affected
  dsa · unbound · debian · bookworm
- 1.17.1-2+deb12u3 · arm64 · bookworm-security
  Not affected
  dsa · unbound · debian · bookworm
[unbound]Unknown
Details (4)
- 1.17.1-2+deb12u4 · amd64 · bookworm
  Not affected
  dsa · unbound · debian · bookworm
- 1.17.1-2+deb12u4 · arm64 · bookworm
  Not affected
  dsa · unbound · debian · bookworm
- 1.17.1-2+deb12u3 · amd64 · bookworm-security
  Not affected
  dsa · unbound · debian · bookworm
- 1.17.1-2+deb12u3 · arm64 · bookworm-security
  Not affected
  dsa · unbound · debian · bookworm
[unbound-anchor]Unknown
Source package: [unbound]
Details (4)
- 1.17.1-2+deb12u4 · amd64 · bookworm
  Not affected
  dsa · unbound · debian · bookworm
- 1.17.1-2+deb12u4 · arm64 · bookworm
  Not affected
  dsa · unbound · debian · bookworm
- 1.17.1-2+deb12u3 · amd64 · bookworm-security
  Not affected
  dsa · unbound · debian · bookworm
- 1.17.1-2+deb12u3 · arm64 · bookworm-security
  Not affected
  dsa · unbound · debian · bookworm
[unbound-host]Unknown
Source package: [unbound]
Details (4)
- 1.17.1-2+deb12u4 · amd64 · bookworm
  Not affected
  dsa · unbound · debian · bookworm
- 1.17.1-2+deb12u4 · arm64 · bookworm
  Not affected
  dsa · unbound · debian · bookworm
- 1.17.1-2+deb12u3 · amd64 · bookworm-security
  Not affected
  dsa · unbound · debian · bookworm
- 1.17.1-2+deb12u3 · arm64 · bookworm-security
  Not affected
  dsa · unbound · debian · bookworm

Observed: Oct 23, 2026, 5:46:34 PM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]