CVE-2020-19861

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

7.5

Vector

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

Exploitability: 3.9 / Impact: 3.6

Source: 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.

Affected (1)

Products: Nlnetlabs: Ldns

1 product

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Nlnetlabs Ldns	Version 1.7.1

Related CWEs

Out-of-bounds Read

The product reads data past the end, or before the beginning, of the intended buffer.

References (4)

https://cwe.mitre.org/data/definitions/126.html

Source: cve@mitre.org

Third Party Advisory

https://github.com/NLnetLabs/ldns/issues/51

Source: cve@mitre.org

ExploitIssue TrackingThird Party Advisory

https://cwe.mitre.org/data/definitions/126.html

Source: af854a3a-2127-422b-91ae-364da2661108

Third Party Advisory

https://github.com/NLnetLabs/ldns/issues/51

Source: af854a3a-2127-422b-91ae-364da2661108

ExploitIssue TrackingThird Party Advisory

Timeline

No history available yet.