CVE-2020-10772

HIGH

7.5

CVSS v3

Description

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.

CWE-406 CWE-400Resource Exhaustion

How to fix

Remediation Available

unboundAmazon

Fixed in:0:1.6.6-5.amzn2

unbound-debuginfoAmazon

Fixed in:0:1.6.6-5.amzn2

unbound-develAmazon

Fixed in:0:1.6.6-5.amzn2

unbound-libsAmazon

Fixed in:0:1.6.6-5.amzn2

unbound-pythonAmazon

Fixed in:0:1.6.6-5.amzn2

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploit Intelligence

1.35%probability of exploitation in 30 days

70thpercentile

Moderate risk: more likely to be exploited than 70% of all known CVEs.

References

Third-Party Advisory1

bugzilla.redhat.com

Related Vulnerabilities

Other CWE-406 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2021-38425	High	7.5	5.1%	-	Fix
CVE-2021-38487	High	8.2	3.3%	-	Fix
CVE-2021-43547	High	7.5	2.5%	-	Fix
CVE-2022-0028	High	8.6	2.4%	KEV	Fix
CVE-2019-14850	Low	3.7	1.6%	-	Fix
CVE-2021-38429	Medium	6.6	1.4%	-	Fix

Common questions

How do I fix CVE-2020-10772?

Published advisories record a fix for 5 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.

Is CVE-2020-10772 being actively exploited?

Not that we know of. CVE-2020-10772 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 1.3% is the estimated probability that it will be exploited in the next 30 days. That is higher than 70% of all scored CVEs.

How severe is CVE-2020-10772?

CVE-2020-10772 has a CVSS v3 base score of 7.5, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2020-10772 affect?

Published advisories record a fix for unbound (Amazon), unbound-debuginfo (Amazon), unbound-devel (Amazon), unbound-libs (Amazon), and 1 more. Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

Embed a live status badge for CVE-2020-10772

Markdown

[![CVE-2020-10772](https://tridentstack.com/cve/badge/CVE-2020-10772.svg)](https://tridentstack.com/cve/CVE-2020-10772)

HTML

<a href="https://tridentstack.com/cve/CVE-2020-10772"><img src="https://tridentstack.com/cve/badge/CVE-2020-10772.svg" alt="CVE-2020-10772"></a>

Check your Linux endpoints for this class of vulnerability

TridentStack Control continuously scans Linux endpoints for known vulnerabilities and deploys the fixes from the same console. 200 endpoints free forever, no credit card.

Patch your fleet free Start freeThis CVE lookup is free and always will be.

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-06-17.