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TI-2020-08667 Aliases CVE-2020-10772GHSA-g6qm-p3jr-vj64

Uncontrolled resource consumption in unbound

Priority LOW 36CWE-406Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-400.

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.

Why it matters now

EPSS 0.01346 71st percentileScored 2026-11-07
Fix Fixed Red Hat: 1 advisory

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
—unboundunbound-1.6.6-5.el7_8—No fix listedCNA
  • unbound Vendor— Affected unbound-1.6.6-5.el7_8 Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:nlnetlabs:unbound:1.6.6-5:*:*:*:*:*:*:*1.6.6-5VulnerableNLNETLABS
cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*7.0Running onRed Hat
  • cpe:2.3:a:nlnetlabs:unbound:1.6.6-5:*:*:*:*:*:*:* Versions 1.6.6-5 Vulnerable ·NLNETLABS
  • cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* Versions 7.0 Running on ·Red Hat

Remediation

Red Hat 1 advisory

  • RHSA-2020:2642 Released 2020-06-22 · Red Hat rating Important
    unbound security update
    • 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-devel-1.6.6-5.el7_8, 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-devel-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, unbound-libs-1.6.6-5.el7_8.ppc
    • Red Hat Enterprise Linux Server Optional (v. 7) unbound-devel-1.6.6-5.el7_8, unbound-devel-1.6.6-5.el7_8.ppc, unbound-python-1.6.6-5.el7_8
    • 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-devel-1.6.6-5.el7_8, unbound-python-1.6.6-5.el7_8

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2020:2642
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2020:2642
Red Hat Enterprise Linux ComputeNode (v. 7)Fixed RHSA-2020:2642
Red Hat Enterprise Linux ComputeNode Optional (v. 7)Fixed RHSA-2020:2642
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2020:2642
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2020:2642
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2020:2642
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2020:2642
Not affected: 2 products
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 8

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-10772
  2. 2026-10-03 Alias added: GHSA-g6qm-p3jr-vj64

References

Advisory 1

  • TI-2023-27571 Certain DNSSEC aspects of the DNS protocol (in RFC 4033, 4034, 4035, 6840, and related… CVSS 3.1HIGH 7.5
  • TI-2019-15178 Unbound before 1.9.5 allows an integer overflow in a size calculation in… CVSS 3.1CRITICAL 9.8
  • TI-2026-25690 Possible arbitrary code execution during DNSSEC validation CVSS 4.0CRITICAL 9.1
  • TI-2026-56302 Heap buffer overflow and possible Remote Code Execution when digesting DNSKEY CVSS 4.0CRITICAL 9.1
  • TI-2019-15182 Unbound before 1.9.5 allows an out-of-bounds write via a compressed name in rdata_copy. CVSS 3.1CRITICAL 9.8
  • TI-2019-15179 Unbound before 1.9.5 allows an integer overflow in a size calculation in respip/respip.c. CVSS 3.1CRITICAL 9.8
See all 72 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences