USN-4276-1: Yubico PIV Tool vulnerabilities

11 February 2020

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



  • 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

Update instructions

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

Ubuntu 18.04

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