Vulnerability Details CVE-2018-20340
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 33.8%
CVSS Severity
CVSS v3 Score 6.8
CVSS v2 Score 4.6
References
- https://blog.inhq.net/posts/yubico-libu2f-host-vuln-part1/
- 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/
- 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/
Products affected by CVE-2018-20340
-
cpe:2.3:a:yubico:libu2f-host:1.1.6
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cpe:2.3:o:debian:debian_linux:9.0