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CVE-2020-19861

ldns: Heap out-of-bound read vulnerability in ldns_nsec3_salt_data function

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Severity

Unknown

Red Hat Product Security

0

CVSS 3.1

Review impact separately from score.

Published · September 26, 2021

Updated · November 22, 2025

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.

Statement

Red Hat Product Security does not consider this to be a vulnerability.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 0
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:N

CWE-125 · Out-of-bounds Read