The following updates has been released for Ubuntu Linux:

USN-3477-4: Firefox regression
USN-3480-3: Apport regression
USN-3514-1: WebKitGTK+ vulnerabilities

USN-3477-4: Firefox regression

==========================================================================
Ubuntu Security Notice USN-3477-4
January 03, 2018

firefox regression
==========================================================================

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

- Ubuntu 17.10
- Ubuntu 17.04
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS

Summary:

USN-3477-1 caused a regression in Firefox.

Software Description:
- firefox: Mozilla Open Source web browser

Details:

USN-3477-1 fixed vulnerabilities in Firefox. The update introduced a
crash reporting issue where background tab crash reports were sent to
Mozilla without user opt-in. 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 cause a denial of service, read uninitialized
memory, obtain sensitive information, bypass same-origin restrictions,
bypass CSP protections, bypass mixed content blocking, spoof the
addressbar, or execute arbitrary code. (CVE-2017-7826, CVE-2017-7827,
CVE-2017-7828, CVE-2017-7830, CVE-2017-7831, CVE-2017-7832, CVE-2017-7833,
CVE-2017-7834, CVE-2017-7835, CVE-2017-7837, CVE-2017-7838, CVE-2017-7842)

It was discovered that javascript: URLs pasted in to the addressbar
would be executed instead of being blocked in some circumstances. If a
user were tricked in to copying a specially crafted URL in to the
addressbar, an attacker could potentially exploit this to conduct
cross-site scripting (XSS) attacks. (CVE-2017-7839)

It was discovered that exported bookmarks do not strip script elements
from user-supplied tags. If a user were tricked in to adding specially
crafted tags to bookmarks, exporting them and then opening the resulting
HTML file, an attacker could potentially exploit this to conduct
cross-site scripting (XSS) attacks. (CVE-2017-7840)

Update instructions:

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

Ubuntu 17.10:
firefox 57.0.3+build1-0ubuntu0.17.10.1

Ubuntu 17.04:
firefox 57.0.3+build1-0ubuntu0.17.04.1

Ubuntu 16.04 LTS:
firefox 57.0.3+build1-0ubuntu0.16.04.1

Ubuntu 14.04 LTS:
firefox 57.0.3+build1-0ubuntu0.14.04.1

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

References:
https://www.ubuntu.com/usn/usn-3477-4
https://www.ubuntu.com/usn/usn-3477-1
https://launchpad.net/bugs/1741048

Package Information:
https://launchpad.net/ubuntu/+source/firefox/57.0.3+build1-0ubuntu0.17.10.1
https://launchpad.net/ubuntu/+source/firefox/57.0.3+build1-0ubuntu0.17.04.1
https://launchpad.net/ubuntu/+source/firefox/57.0.3+build1-0ubuntu0.16.04.1
https://launchpad.net/ubuntu/+source/firefox/57.0.3+build1-0ubuntu0.14.04.1

USN-3480-3: Apport regression

==========================================================================
Ubuntu Security Notice USN-3480-3
January 03, 2018

apport regression
==========================================================================

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

- Ubuntu 17.10
- Ubuntu 17.04
- Ubuntu 16.04 LTS

Summary:

USN-3480-2 introduced regressions in Apport.

Software Description:
- apport: automatically generate crash reports for debugging

Details:

USN-3480-2 fixed regressions in Apport. The update introduced a new
regression in the container support. This update addresses the problem.

We apologize for the inconvenience.

Original advisory details:

 Sander Bos discovered that Apport incorrectly handled core dumps for
 setuid binaries. A local attacker could use this issue to perform a
 denial of service via resource exhaustion or possibly gain root
 privileges. (CVE-2017-14177)

 Sander Bos discovered that Apport incorrectly handled core dumps for
 processes in a different PID namespace. A local attacker could use
 this issue to perform a denial of service via resource exhaustion or
 possibly gain root privileges. (CVE-2017-14180)

Update instructions:

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

Ubuntu 17.10:
  apport 2.20.7-0ubuntu3.7

Ubuntu 17.04:
  apport 2.20.4-0ubuntu4.10

Ubuntu 16.04 LTS:
  apport 2.20.1-0ubuntu2.15

In general, a standard system update will make all the necessary
changes.

References:
  https://www.ubuntu.com/usn/usn-3480-3
  https://www.ubuntu.com/usn/usn-3480-1
  https://launchpad.net/bugs/1733366

Package Information:
  https://launchpad.net/ubuntu/+source/apport/2.20.7-0ubuntu3.7
  https://launchpad.net/ubuntu/+source/apport/2.20.4-0ubuntu4.10
  https://launchpad.net/ubuntu/+source/apport/2.20.1-0ubuntu2.15

USN-3514-1: WebKitGTK+ vulnerabilities

==========================================================================
Ubuntu Security Notice USN-3514-1
January 03, 2018

webkit2gtk vulnerabilities
==========================================================================

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

- Ubuntu 17.10
- Ubuntu 17.04
- Ubuntu 16.04 LTS

Summary:

Several security issues were fixed in WebKitGTK+.

Software Description:
- webkit2gtk: Web content engine library for GTK+

Details:

A large number of security issues were discovered in the WebKitGTK+ Web and
JavaScript engines. If a user were tricked into viewing a malicious
website, a remote attacker could exploit a variety of issues related to web
browser security, including cross-site scripting attacks, denial of service
attacks, and arbitrary code execution.

Update instructions:

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

Ubuntu 17.10:
libjavascriptcoregtk-4.0-18 2.18.4-0ubuntu0.17.10.1
libwebkit2gtk-4.0-37 2.18.4-0ubuntu0.17.10.1

Ubuntu 17.04:
libjavascriptcoregtk-4.0-18 2.18.4-0ubuntu0.17.04.1
libwebkit2gtk-4.0-37 2.18.4-0ubuntu0.17.04.1

Ubuntu 16.04 LTS:
libjavascriptcoregtk-4.0-18 2.18.4-0ubuntu0.16.04.1
libwebkit2gtk-4.0-37 2.18.4-0ubuntu0.16.04.1

This update uses a new upstream release, which includes additional bug
fixes. After a standard system update you need to restart any applications
that use WebKitGTK+, such as Epiphany, to make all the necessary changes.

References:
https://www.ubuntu.com/usn/usn-3514-1
CVE-2017-13856, CVE-2017-13866, CVE-2017-13870, CVE-2017-7156

Package Information:
https://launchpad.net/ubuntu/+source/webkit2gtk/2.18.4-0ubuntu0.17.10.1
https://launchpad.net/ubuntu/+source/webkit2gtk/2.18.4-0ubuntu0.17.04.1
https://launchpad.net/ubuntu/+source/webkit2gtk/2.18.4-0ubuntu0.16.04.1