Ubuntu Security Notice USN-2743-3
24th September, 2015
unity-firefox-extension, webapps-greasemonkey, webaccounts-browser-extension update
A security issue affects these releases of Ubuntu and its
derivatives:
- Ubuntu 15.04
- Ubuntu 14.04 LTS
Summary
This update provides compatible packages for Firefox 41
Software description
- unity-firefox-extension
– Unity Integration for Firefox
- webaccounts-browser-extension
– Ubuntu Online Accounts extension for chromium
- webapps-greasemonkey
– Firefox extension: Website Integration
Details
USN-2743-1 fixed vulnerabilities in Firefox. Future Firefox updates will
require all addons be signed and unity-firefox-extension, webapps-greasemonkey
and webaccounts-browser-extension will not go through the signing process.
Because these addons currently break search engine installations (LP:
#1069793), this update permanently disables the addons by removing them from
the system.
We apologize for any inconvenience.
Original advisory details:
Andrew Osmond, Olli Pettay, Andrew Sutherland, Christian Holler, David
Major, Andrew McCreight, Cameron McCormack, Bob Clary and Randell Jesup
discovered multiple memory safety issues 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 via application
crash, or execute arbitrary code with the privileges of the user invoking
Firefox. (CVE-2015-4500, CVE-2015-4501)
André Bargull discovered that when a web page creates a scripted proxy
for the window with a handler defined a certain way, a reference to the
inner window will be passed, rather than that of the outer window.
(CVE-2015-4502)
Felix Gröbert discovered an out-of-bounds read in the QCMS color
management library in some circumstances. 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 application crash, or obtain
sensitive information. (CVE-2015-4504)
Khalil Zhani discovered a buffer overflow when parsing VP9 content in some
circumstances. 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 application crash, or execute arbitrary code with the
privileges of the user invoking Firefox. (CVE-2015-4506)
Spandan Veggalam discovered a crash while using the debugger API in some
circumstances. If a user were tricked in to opening a specially crafted
website whilst using the debugger, an attacker could potentially exploit
this to execute arbitrary code with the privileges of the user invoking
Firefox. (CVE-2015-4507)
Juho Nurminen discovered that the URL bar could display the wrong URL in
reader mode in some circumstances. If a user were tricked in to opening a
specially crafted website, an attacker could potentially exploit this to
conduct URL spoofing attacks. (CVE-2015-4508)
A use-after-free was discovered when manipulating HTML media content in
some circumstances. 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 application crash, or execute arbitrary code with
the privileges of the user invoking Firefox. (CVE-2015-4509)
Looben Yang discovered a use-after-free when using a shared worker with
IndexedDB in some circumstances. 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 application crash, or execute arbitrary code
with the privileges of the user invoking Firefox. (CVE-2015-4510)
Francisco Alonso discovered an out-of-bounds read during 2D canvas
rendering in some circumstances. If a user were tricked in to opening a
specially crafted website, an attacker could potentially exploit this to
obtain sensitive information. (CVE-2015-4512)
Jeff Walden discovered that changes could be made to immutable properties
in some circumstances. If a user were tricked in to opening a specially
crafted website, an attacker could potentially exploit this to execute
arbitrary script in a privileged scope. (CVE-2015-4516)
Ronald Crane reported multiple vulnerabilities. If a user were tricked in
to opening a specially crafted website, an attacker could potentially
exploit these to cause a denial of service via application crash, or
execute arbitrary code with the privileges of the user invoking Firefox.
(CVE-2015-4517, CVE-2015-4521, CVE-2015-4522, CVE-2015-7174,
CVE-2015-7175, CVE-2015-7176, CVE-2015-7177, CVE-2015-7180)
Mario Gomes discovered that dragging and dropping an image after a
redirect exposes the redirected URL to scripts. An attacker could
potentially exploit this to obtain sensitive information. (CVE-2015-4519)
Ehsan Akhgari discovered 2 issues with CORS preflight requests. An
attacker could potentially exploit these to bypass CORS restrictions.
(CVE-2015-4520)
Update instructions
The problem can be corrected by updating your system to the following
package version:
- Ubuntu 15.04:
-
xul-ext-websites-integration
2.3.6+14.10.20140701-0ubuntu1.15.04.1
-
xul-ext-unity
3.0.0+14.04.20140416-0ubuntu1.15.04.1
-
xul-ext-webaccounts
0.5-0ubuntu4.15.04.1
- Ubuntu 14.04 LTS:
-
xul-ext-websites-integration
2.3.6+13.10.20130920.1-0ubuntu1.2
-
xul-ext-unity
3.0.0+14.04.20140416-0ubuntu1.14.04.1
-
xul-ext-webaccounts
0.5-0ubuntu2.14.04.1
To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades.
After a standard system update you need to restart Firefox to make
all the necessary changes.
References
LP: 1069793,
LP: 1498681