CVE-2020-19860

Name: CVE-2020-19860
Creator: NVD / NIST
Published: 2022-01-21T14:15:07.69+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 1.31%

Last modified Jun 17, 2026

CVE-2020-19860 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. When ldns version 1.7.1 verifies a zone file, the ldns_rr_new_frm_str_internal function has a heap out of bounds read vulnerability. An attacker can leak information on the heap by constructing a zone file payload.. EPSS estimates a 1.31% chance of exploitation in the next 30 days.

Description

When ldns version 1.7.1 verifies a zone file, the ldns_rr_new_frm_str_internal function has a heap out of bounds read vulnerability. An attacker can leak information on the heap by constructing a zone file payload.

Metrics

CVSS 3.1

6.5/10

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

EPSS Probability

1.31%

67.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-125

Affected Software

Vendor	Product	Versions
Nlnetlabs	Ldns	1.7.1

References

https://github.com/NLnetLabs/ldns/commit/15d96206996bea969fbc918eb0a4a346f514b9f3Patch, Third Party Advisory
https://github.com/NLnetLabs/ldns/issues/50Exploit, Issue Tracking, Third Party Advisory
https://github.com/NLnetLabs/ldns/commit/15d96206996bea969fbc918eb0a4a346f514b9f3Patch, Third Party Advisory
https://github.com/NLnetLabs/ldns/issues/50Exploit, Issue Tracking, Third Party Advisory

Timeline

Published: Jan 21, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-19860?

How severe is CVE-2020-19860?

CVE-2020-19860 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 1.31% probability of exploitation in the next 30 days.

How do I fix CVE-2020-19860?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-19860?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST