CVE-2018-20340
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2018-20340
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2018-20340.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2018-20340
- Downstream
- Related
- Published
- 2019-03-21T16:00:35Z
- Modified
- 2025-08-09T20:01:27Z
- Severity
-
- 6.8 (Medium) CVSS_V3 - CVSS:3.0/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- [none]
- Details
-
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.
- References
-
- https://developers.yubico.com/libu2f-host/Release_Notes.html
- https://seclists.org/bugtraq/2019/Feb/23
- https://security.gentoo.org/glsa/202004-15
- https://www.debian.org/security/2019/dsa-4389
- https://www.yubico.com/support/security-advisories/ysa-2019-01/
- https://blog.inhq.net/posts/yubico-libu2f-host-vuln-part1/