USN-4276-1: Yubico PIV Tool vulnerabilities

11 February 2020

Yubico PIV Tool vulnerabilities

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 18.04 LTS


Yubico PIV Tool could be made to crash or run programs as an administrator if it received specially crafted input.

Software Description

  • yubico-piv-tool - Command line tool for the YubiKey PIV applet


It was discovered that libykpiv, a supporting library of the Yubico PIV Tool and YubiKey PIV Manager, mishandled specially crafted input. An attacker with a custom-made, malicious USB device could potentially execute arbitrary code on a computer running the Yubico PIV Tool or Yubikey PIV Manager.

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 18.04 LTS
libykpiv1 - 1.4.2-2ubuntu0.1
ykcs11 - 1.4.2-2ubuntu0.1
yubico-piv-tool - 1.4.2-2ubuntu0.1

To update your system, please follow these instructions:

After a standard system update you need to reboot your computer to make all the necessary changes.