USN-3609-1: Firefox vulnerability

27 March 2018

Firefox could be made to crash or run programs as your login if it opened a malicious website.



  • firefox - Mozilla Open Source web browser


A use-after-free was discovered in Firefox. If a user were tricked in to
opening a specially crafted website, an attacker could potentially exploit
this to cause a denial of service or execute arbitrary code.

Update instructions

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

Ubuntu 17.10
Ubuntu 16.04
Ubuntu 14.04

After a standard system update you need to restart Firefox to make
all the necessary changes.