USN-3186-1: iucode-tool vulnerability

1 February 2017

iucode-tool vulnerability

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

  • Ubuntu 16.10
  • Ubuntu 16.04 LTS


iucode-tool could be made to crash or run programs if it opened a specially crafted file.

Software Description

  • iucode-tool - Intel processor microcode tool


It was discovered that iucode-tool incorrectly handled certain microcodes when using the -tr loader. If a user were tricked into processing a specially crafted microcode, a remote attacker could use this issue to cause iucode-tool to crash, resulting in a denial of service, or possibly execute arbitrary code.

Update instructions

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

Ubuntu 16.10
iucode-tool - 1.6.1-1ubuntu0.1
Ubuntu 16.04 LTS
iucode-tool - 1.5.1-1ubuntu0.1

To update your system, please follow these instructions:

In general, a standard system update will make all the necessary changes.