CVE-2020-19860

CVSS V2 Medium 4.3 CVSS V3 Medium 6.5

Description

When ldns version 1.7.1 verifies a zone file, the ldns_rr_new_frm_str_internal function has a heap out of bounds read vulnerability. An attacker can leak information on the heap by constructing a zone file payload.

Overview

CVE ID
CVE-2020-19860

Assigner
cve@mitre.org

Vulnerability Status
Analyzed

Published Version
2022-01-21T14:15:07

Last Modified Date
2022-01-27T16:36:36

Weakness Enumerations

CWE	URL
CWE-125	http://cwe.mitre.org/data/definitions/125.html

CPE Configuration (Product)

CPE	Vulnerable	Operator	Version Start	Version End
cpe:2.3:a:nlnetlabs:ldns:1.7.1:::::::*	1	OR

CVSS Version 2

Version
2.0

Vector String
AV:N/AC:M/Au:N/C:P/I:N/A:N

Access Vector
NETWORK

Access Compatibility
MEDIUM

Authentication
NONE

Confidentiality Impact
PARTIAL

Integrity Impact
NONE

Availability Impact
NONE

Base Score
4.3

Severity
MEDIUM

Exploitability Score
8.6

Impact Score
2.9

CVSS Version 3

Version
3.1

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

Attack Vector
NETWORK

Attack Compatibility
LOW

Privileges Required
NONE

User Interaction
REQUIRED

Scope
UNCHANGED

Confidentiality Impact
HIGH

Availability Impact
NONE

Base Score
6.5

Base Severity
MEDIUM

Exploitability Score
2.8

Impact Score
3.6

References

Reference URL	Reference Tags
https://github.com/NLnetLabs/ldns/issues/50	Exploit Issue Tracking Third Party Advisory
https://github.com/NLnetLabs/ldns/commit/15d96206996bea969fbc918eb0a4a346f514b9f3	Patch Third Party Advisory

Sources

Source Name	Source URL
NIST	https://nvd.nist.gov/vuln/detail/CVE-2020-19860
MITRE	https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-19860

History

Created	Old Value	New Value	Data Type	Notes
2022-05-10 06:36:01				Added to TrackCVE
2022-12-06 07:23:26	2022-01-21T14:15Z	2022-01-21T14:15:07	CVE Published Date	updated
2022-12-06 07:23:26		2022-01-27T16:36:36	CVE Modified Date	updated
2022-12-06 07:23:26		Analyzed	Vulnerability Status	updated