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.
- cups: Common UNIX Printing System(tm)
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.
The problem can be corrected by updating your system to the following
Ubuntu 16.04 LTS:
Ubuntu 14.04 LTS:
In general, a standard system update will make all the necessary changes.