CVEvulnerability
CVE-2018-20340
6.8 MEDIUM
Official page ↗
- Status
- Modified
- Published
- 2019-03-21
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.0 ([email protected])
- 6.8 MEDIUM — CVSS:3.0/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CVSS 2.0 ([email protected])
- 4.6 MEDIUM — AV:L/AC:L/Au:N/C:P/I:P/A:P
- Weaknesses
- CWE-119
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.
Affected configurations
• yubico libu2f-host 1.1.6
• debian debian linux 9.0
Related
Weakness · CWE (1)
- CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer weakness
References
- https://blog.inhq.net/posts/yubico-libu2f-host-vuln-part1/ blog.inhq.net
- https://developers.yubico.com/libu2f-host/Release_Notes.html Release Notes, Vendor Advisory
- https://seclists.org/bugtraq/2019/Feb/23 Mailing List, Third Party Advisory
- https://security.gentoo.org/glsa/202004-15 security.gentoo.org
- https://www.debian.org/security/2019/dsa-4389 Third Party Advisory
- https://www.yubico.com/support/security-advisories/ysa-2019-01/ Patch, Vendor Advisory
- https://blog.inhq.net/posts/yubico-libu2f-host-vuln-part1/ blog.inhq.net
- https://developers.yubico.com/libu2f-host/Release_Notes.html Release Notes, Vendor Advisory
- https://seclists.org/bugtraq/2019/Feb/23 Mailing List, Third Party Advisory
- https://security.gentoo.org/glsa/202004-15 security.gentoo.org
- https://www.debian.org/security/2019/dsa-4389 Third Party Advisory
- https://www.yubico.com/support/security-advisories/ysa-2019-01/ Patch, Vendor Advisory