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USN-4140-1: Firefox vulnerability

25 September 2019

Firefox could be made to hijack the mouse pointer it if opened a malicious website.



  • firefox - Mozilla Open Source web browser


It was discovered that no user notification was given when pointer lock is
enabled. If a user were tricked in to opening a specially crafted website,
an attacker could potentially exploit this to hijack the mouse pointer and
confuse users.

Update instructions

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

Ubuntu 19.04
Ubuntu 18.04
Ubuntu 16.04

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