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Debian Security Advisory DSA 4389-1 (libu2f-host - security update)
Information
Severity
Severity
Family
Family
CVSSv2 Base
CVSSv2 Base
CVSSv2 Vector
CVSSv2 Vector
Solution Type
Solution Type
Created
Created
Modified
Modified
Summary
Christian Reitter discovered that libu2f-host, a library implementing the host-side of the U2F protocol, failed to properly check for a buffer overflow. This would allow 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, to potentially execute arbitrary code on that computer.
Affected Software
Affected Software
libu2f-host on Debian Linux
Detection Method
Detection Method
This check tests the installed software version using the apt package manager.
Solution
Solution
For the stable distribution (stretch), this problem has been fixed in version 1.1.2-2+deb9u1. We recommend that you upgrade your libu2f-host packages. For the detailed security status of libu2f-host please refer to its security tracker page linked in the references.