Buffer overflow in libu2f-host - CVE-2018-20340
Published: February 18, 2019
Vulnerability identifier: #VU17735
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2018-20340
CWE-ID: CWE-120
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Yubico
Affected software:
libu2f-host
libu2f-host
Detailed vulnerability description
The vulnerability allows a physical attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error. An attacker with a custom made malicious USB device masquerading as a security key, and physical access to a computer where PAM U2F or an application with libu2f-host integrated can trigger buffer overflow and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
How to mitigate CVE-2018-20340
Update to version 1.1.7.