Ubuntu: 3111-1 Critical: Firefox Denial Of Service Exploits

ubuntu

October 27, 2016

Several security issues were fixed in Firefox.

Summary

Several security issues were fixed in Firefox.

Software Description:

- firefox: Mozilla Open Source web browser

Details:

A use-after-free was discovered in service workers. If a user were tricked

in to opening a specially crafted website, an attacker could potentially

exploit this to cause a denial of service via program crash, or execute

arbitrary code. (CVE-2016-5287)

It was discovered that web content could access information in the HTTP

cache in some circumstances. An attacker could potentially exploit this

to obtain sensitive information. (CVE-2016-5288)

Topics Covered

security advisory denial of service critical firefox ubuntu

Update Instructions

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

Ubuntu 16.10:
  firefox                         49.0.2+build2-0ubuntu0.16.10.2

Ubuntu 16.04 LTS:
  firefox                         49.0.2+build2-0ubuntu0.16.04.2

Ubuntu 14.04 LTS:
  firefox                         49.0.2+build2-0ubuntu0.14.04.1

Ubuntu 12.04 LTS:
  firefox                         49.0.2+build2-0ubuntu0.12.04.1

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