CVE Vulnerability

CVE-2020-19861

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.

5 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 10 / Impact : 2.9

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact PARTIAL

Integrity Impact NONE

Availability Impact NONE

Scope

7.5 /10

CVSS v3.0 : HIGH

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References
Link Resource
https://github.com/NLnetLabs/ldns/issues/51 Exploit Issue Tracking
https://cwe.mitre.org/data/definitions/126.html Third Party Advisory
Configurations

Configuration 1

cpe:2.3:a:nlnetlabs:ldns:1.7.1:*:*:*:*:*:*:*
Information

Published : 2022-01-21 03:15

Updated : 2022-10-05 05:08

NVD link : CVE-2020-19861

Mitre link : CVE-2020-19861

Products Affected

Ldns

Nlnetlabs

CWE
CWE-125

Out-of-bounds Read