CVE-2020-19861
CVSS V2 Medium 5
CVSS V3 High 7.5
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.
Overview
- CVE ID
- CVE-2020-19861
- Assigner
- cve@mitre.org
- Vulnerability Status
- Analyzed
- Published Version
- 2022-01-21T15:15:07
- Last Modified Date
- 2022-10-05T17:08:19
Weakness Enumerations
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:L/Au:N/C:P/I:N/A:N
- Access Vector
- NETWORK
- Access Compatibility
- LOW
- Authentication
- NONE
- Confidentiality Impact
- PARTIAL
- Integrity Impact
- NONE
- Availability Impact
- NONE
- Base Score
- 5
- Severity
- MEDIUM
- Exploitability Score
- 10
- Impact Score
- 2.9
CVSS Version 3
- Version
- 3.1
- Vector String
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- Attack Vector
- NETWORK
- Attack Compatibility
- LOW
- Privileges Required
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality Impact
- HIGH
- Availability Impact
- NONE
- Base Score
- 7.5
- Base Severity
- HIGH
- Exploitability Score
- 3.9
- Impact Score
- 3.6
References
| Reference URL | Reference Tags |
|---|---|
| https://cwe.mitre.org/data/definitions/126.html | Third Party Advisory |
| https://github.com/NLnetLabs/ldns/issues/51 | Exploit Issue Tracking Third Party Advisory |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2020-19861 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-19861 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 06:36:00 | Added to TrackCVE | |||
| 2022-12-06 07:23:36 | 2022-01-21T15:15Z | 2022-01-21T15:15:07 | CVE Published Date | updated |
| 2022-12-06 07:23:36 | 2022-10-05T17:08:19 | CVE Modified Date | updated | |
| 2022-12-06 07:23:36 | Analyzed | Vulnerability Status | updated | |
| 2022-12-06 07:23:41 | References | updated |