CVE-2020-19861

PoC —

CVSS 3.1

7.5 high

EPSS

1%p73

Published

Jan 21, 2022 (Jan 21, 2022)

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.

Vendors: nlnetlabs
Products: ldns
Weakness: CWE-125
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

NVD CVE.org GitHub PoCs EPSS (1.5%)

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