Is CVE-2020-19861 in the CISA KEV catalog?

No. CVE-2020-19861 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2020-19861?

CVE-2020-19861 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2020-19861?

CVE-2020-19861 has an EPSS score of 1.49% (71th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2020-19861?

Upgrade ldns on debian 12 to 1.8.1-1 or later. Fixes are available for 5 affected products.

CVE & CISA-KEV Catalog

CVE-2020-19861

HIGHEPSS 71th pctl

7.5

CVSS v3

NVD

Description

When a zone file in ldns 1.7.1 is parsed, the function ldns_nsec3_salt_data is too trusted for the length value obtained from the zone file. When the memcpy is copied, the 0xfe - ldns_rdf_size(salt_rdf) byte data can be copied, causing heap overflow information leakage.

CWE-125Out-of-bounds Read

How to fix

Remediation Available

ldnsDebian

Fixed in:1.8.1-1CVE-2020-19861

ldnsUbuntu

Fixed in:1.6.17-8ubuntu0.1+esm1USN-5257-1

Fixed in:1.7.0-3ubuntu4.1USN-5257-1

Fixed in:1.7.0-4.1ubuntu1+esm1USN-5257-2

Fixed in:1.7.1-2ubuntu4+esm1USN-5257-2

libldns1Ubuntu

Fixed in:1.6.17-8ubuntu0.1+esm1USN-5257-1

libldns2Ubuntu

Fixed in:1.7.0-3ubuntu4.1USN-5257-1

Fixed in:1.7.0-4.1ubuntu1+esm1USN-5257-2

libldns3Ubuntu

Fixed in:1.7.1-2ubuntu4+esm1USN-5257-2

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

ConfidentialityHigh

IntegrityNone

AvailabilityNone

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

Exploit Intelligence

1.49%probability of exploitation in 30 days

71stpercentile

Elevated risk: more likely to be exploited than 71% of all known CVEs.

References

Exploit1

github.com

Third-Party Advisory1

cwe.mitre.org

Related Vulnerabilities

Other CWE-125 (Out-of-bounds Read) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2014-0160	High	7.5	100%	KEV	Fix
CVE-2025-5777	High	7.5	100%	KEV + Ransom	Fix
CVE-2021-4034	High	7.8	95%	KEV	Fix
CVE-2023-21769	High	7.5	92%	-	Fix
CVE-2023-49285	High	8.6	89%	-	Fix
CVE-2020-8794	Critical	9.8	89%	-	Fix

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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 2024-11-21.