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Ubuntu Security Notice USN-4276-1
February 11, 2020

Yubico PIV Tool vulnerabilities
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 18.04 LTS

Summary:

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

Details:

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

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

References:
  https://usn.ubuntu.com/4276-1
  CVE-2018-14779, CVE-2018-14780

Package Information:
  https://launchpad.net/ubuntu/+source/yubico-piv-tool/1.4.2-2ubuntu0.1