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Fencer Vulns
high 7.5

CVE-2020-10772 json

An incomplete fix for CVE-2020-12662 was shipped for Unbound in Red Hat Enterprise Linux 7, as part of erratum RHSA-2020:2414.

published 2020-11-27 5 y ago modified 2026-06-17 4 mo ago also EUVD-2020-3186

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.3%
EPSS 1.3% chance of exploitation in 30 days, percentile 71%
public exploits
0
none known

Summary

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.

Patch / fix

  • unbound RHEL 7 1.6.6-5.el7_8
  • unbound-libs RHEL 7 1.6.6-5.el7_8
  • unbound-python RHEL 7 1.6.6-5.el7_8

red hat advisories RHSA-2020:2642

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2020-10772 updated cvss 7.5

unbound: incomplete fix for CVE-2020-12662 in RHEL7

  • Red Hat Enterprise Linux Client (v. 7) unbound 1.6.6-5.el7_8, unbound-libs 1.6.6-5.el7_8 Red Hat Enterprise Linux Client Optional (v. 7) unbound-python 1.6.6-5.el7_8 Red Hat Enterprise Linux ComputeNode (v. 7) unbound 1.6.6-5.el7_8, unbound-libs 1.6.6-5.el7_8 Red Hat Enterprise Linux ComputeNode Optional (v. 7) unbound 1.6.6-5.el7_8, unbound-python 1.6.6-5.el7_8 Red Hat Enterprise Linux Server (v. 7) unbound 1.6.6-5.el7_8, unbound-libs 1.6.6-5.el7_8 Red Hat Enterprise Linux Server Optional (v. 7) unbound-python 1.6.6-5.el7_8
    +2 more products
    Red Hat Enterprise Linux Workstation (v. 7) unbound 1.6.6-5.el7_8, unbound-libs 1.6.6-5.el7_8 Red Hat Enterprise Linux Workstation Optional (v. 7) unbound-python 1.6.6-5.el7_8
    fixed: vendor fix RHSA-2020:2642
  • Red Hat Enterprise Linux 6 unbound, unbound-libs, unbound-python Red Hat Enterprise Linux 8 unbound, unbound-libs, python3-unbound
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.35% chance of exploitation in the next 30 days, higher than 71% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P

Affected products

  • n/a unbound

Classification

Weakness
  • CWE-406 Insufficient Control of Network Message Volume (Network Amplification)
  • CWE-400 Uncontrolled Resource Consumption

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.