USN-3577-1: CUPS vulnerability

21 February 2018

cups vulnerability

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

  • Ubuntu 16.04 LTS
  • Ubuntu 14.04 LTS


CUPS could be made to provide access to printers over the network.

Software Description

  • cups - Common UNIX Printing System™


Jann Horn discovered that CUPS permitted HTTP requests with the Host header set to “localhost.localdomain” from the loopback interface. If a user were tricked in to opening a specially crafted website in their web browser, an attacker could potentially exploit this to obtain sensitive information or control printers, via a DNS rebinding attack. (CVE-2017-18190)

Update instructions

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

Ubuntu 16.04 LTS
cups - 2.1.3-4ubuntu0.4
Ubuntu 14.04 LTS
cups - 1.7.2-0ubuntu1.9

To update your system, please follow these instructions:

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