CVE-2018-20340
CVSS V2 Medium 4.6
CVSS V3 Medium 6.8
Description
Yubico libu2f-host 1.1.6 contains unchecked buffers in devs.c, which could enable a malicious token to exploit a buffer overflow. An attacker could use this to attempt to execute malicious code using a crafted USB device masquerading as a security token on a computer where the affected library is currently in use. It is not possible to perform this attack with a genuine YubiKey.
Overview
- CVE ID
- CVE-2018-20340
- Assigner
- cve@mitre.org
- Vulnerability Status
- Modified
- Published Version
- 2019-03-21T16:00:35
- Last Modified Date
- 2019-12-05T17:15:12
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| cpe:2.3:a:yubico:libu2f-host:1.1.6:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* | 1 | OR |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:L/AC:L/Au:N/C:P/I:P/A:P
- Access Vector
- LOCAL
- Access Compatibility
- LOW
- Authentication
- NONE
- Confidentiality Impact
- PARTIAL
- Integrity Impact
- PARTIAL
- Availability Impact
- PARTIAL
- Base Score
- 4.6
- Severity
- MEDIUM
- Exploitability Score
- 3.9
- Impact Score
- 6.4
CVSS Version 3
- Version
- 3.0
- Vector String
- CVSS:3.0/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Attack Vector
- PHYSICAL
- Attack Compatibility
- LOW
- Privileges Required
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality Impact
- HIGH
- Availability Impact
- HIGH
- Base Score
- 6.8
- Base Severity
- MEDIUM
- Exploitability Score
- 0.9
- Impact Score
- 5.9
References
| Reference URL | Reference Tags |
|---|---|
| https://www.yubico.com/support/security-advisories/ysa-2019-01/ | Patch Vendor Advisory |
| https://www.debian.org/security/2019/dsa-4389 | Third Party Advisory |
| https://seclists.org/bugtraq/2019/Feb/23 | Mailing List Third Party Advisory |
| https://developers.yubico.com/libu2f-host/Release_Notes.html | Release Notes Vendor Advisory |
| https://blog.inhq.net/posts/yubico-libu2f-host-vuln-part1/ | |
| https://security.gentoo.org/glsa/202004-15 |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2018-20340 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-20340 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 16:58:18 | Added to TrackCVE | |||
| 2022-12-03 18:22:46 | 2019-03-21T16:00Z | 2019-03-21T16:00:35 | CVE Published Date | updated |
| 2022-12-03 18:22:46 | 2019-12-05T17:15:12 | CVE Modified Date | updated | |
| 2022-12-03 18:22:46 | Modified | Vulnerability Status | updated |