=========================================================================Ubuntu Security Notice USN-3216-2
March 30, 2017

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

- Ubuntu 16.10
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS
- Ubuntu 12.04 LTS

Summary:

USN-3216-1 introduced a regression in Firefox.

Software Description:
- firefox: Mozilla Open Source web browser

Details:

USN-3216-1 fixed vulnerabilities in Firefox. The update resulted in a
startup crash when Firefox is used with XRDP. This update fixes the
problem.

We apologize for the inconvenience.

Original advisory details:

 Multiple security issues were discovered in Firefox. If a user were
 tricked in to opening a specially crafted website, an attacker could
 potentially exploit these to bypass same origin restrictions, obtain
 sensitive information, spoof the addressbar, spoof the print dialog,
 cause a denial of service via application crash or hang, or execute
 arbitrary code. (CVE-2017-5398, CVE-2017-5399, CVE-2017-5400,
 CVE-2017-5401, CVE-2017-5402, CVE-2017-5403, CVE-2017-5404, CVE-2017-5405,
 CVE-2017-5406, CVE-2017-5407, CVE-2017-5408, CVE-2017-5410, CVE-2017-5412,
 CVE-2017-5413, CVE-2017-5414, CVE-2017-5415, CVE-2017-5416, CVE-2017-5417,
 CVE-2017-5418, CVE-2017-5419, CVE-2017-5420, CVE-2017-5421, CVE-2017-5422,
 CVE-2017-5426, CVE-2017-5427)

Update instructions:

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

Ubuntu 16.10:
  firefox                         52.0.2+build1-0ubuntu0.16.10.1

Ubuntu 16.04 LTS:
  firefox                         52.0.2+build1-0ubuntu0.16.04.1

Ubuntu 14.04 LTS:
  firefox                         52.0.2+build1-0ubuntu0.14.04.1

Ubuntu 12.04 LTS:
  firefox                         52.0.2+build1-0ubuntu0.12.04.1

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

References:
  https://ubuntu.com/security/notices/USN-3216-2
  https://ubuntu.com/security/notices/USN-3216-1
  https://launchpad.net/bugs/1671079

Package Information:
  https://launchpad.net/ubuntu/+source/firefox/52.0.2+build1-0ubuntu0.16.10.1
  https://launchpad.net/ubuntu/+source/firefox/52.0.2+build1-0ubuntu0.16.04.1
  https://launchpad.net/ubuntu/+source/firefox/52.0.2+build1-0ubuntu0.14.04.1
  https://launchpad.net/ubuntu/+source/firefox/52.0.2+build1-0ubuntu0.12.04.1