Security Information / 2019 / Security Information -- DSA-4389-1 libu2f-host

Debian Security Advisory

DSA-4389-1 libu2f-host -- security update

Date Reported:

11 Feb 2019

Affected Packages:

libu2f-host

Vulnerable:

Yes

Security database references:

In the Debian bugtracking system: Bug 921725.
In Mitre's CVE dictionary: CVE-2018-20340.

More information:

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.

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 at: https://security-tracker.debian.org/tracker/libu2f-host