CVE-2020-19861 Information

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.

CVSS Vector

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

Reference

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

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

NONE

Base Score

NONE

Base Severity

7.5