CVE-2020-19861

HighCVSS 7.5/10Last modified Jun 17, 2026

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.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Weakness enumeration

CWE-125

Affected software

No affected versions have been published.

Timeline

Published
Jan 21, 2022
Last modified
Jun 17, 2026
NVD status
Modified

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CVE-2020-19861: High severity, CVSS 7.5 | Vulnix