Ubuntu Security Notice USN-2458-2
14th January, 2015
ubufox update
A security issue affects these releases of Ubuntu and its
derivatives:
- Ubuntu 14.10
- Ubuntu 14.04 LTS
- Ubuntu 12.04 LTS
Summary
This update provides compatible packages for Firefox 35.
Software description
- ubufox
– Ubuntu Firefox specific configuration defaults and apt support
Details
USN-2458-1 fixed vulnerabilities in Firefox. This update provides the
corresponding version of Ubufox.
Original advisory details:
Christian Holler, Patrick McManus, Christoph Diehl, Gary Kwong, Jesse
Ruderman, Byron Campen, Terrence Cole, and Nils Ohlmeier 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-2014-8634, CVE-2014-8635)
Bobby Holley discovered that some DOM objects with certain properties
can bypass XrayWrappers in some circumstances. If a user were tricked in
to opening a specially crafted website, an attacker could potentially
exploit this to bypass security restrictions. (CVE-2014-8636)
Michal Zalewski discovered a use of uninitialized memory when rendering
malformed bitmap images on a canvas element. If a user were tricked in to
opening a specially crafted website, an attacker could potentially
exploit this to steal confidential information. (CVE-2014-8637)
Muneaki Nishimura discovered that requests from navigator.sendBeacon()
lack an origin header. If a user were tricked in to opening a specially
crafted website, an attacker could potentially exploit this to conduct
cross-site request forgery (XSRF) attacks. (CVE-2014-8638)
Xiaofeng Zheng discovered that a web proxy returning a 407 response
could inject cookies in to the originally requested domain. If a user
connected to a malicious web proxy, an attacker could potentially exploit
this to conduct session-fixation attacks. (CVE-2014-8639)
Holger Fuhrmannek discovered a crash in Web Audio while manipulating
timelines. If a user were tricked in to opening a specially crafted
website, an attacker could potentially exploit this to cause a denial
of service. (CVE-2014-8640)
Mitchell Harper discovered a use-after-free in WebRTC. 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-2014-8641)
Brian Smith discovered that OCSP responses would fail to verify if signed
by a delegated OCSP responder certificate with the id-pkix-ocsp-nocheck
extension, potentially allowing a user to connect to a site with a revoked
certificate. (CVE-2014-8642)
Update instructions
The problem can be corrected by updating your system to the following
package version:
- Ubuntu 14.10:
-
xul-ext-ubufox
3.0-0ubuntu0.14.10.1
- Ubuntu 14.04 LTS:
-
xul-ext-ubufox
3.0-0ubuntu0.14.04.1
- Ubuntu 12.04 LTS:
-
xul-ext-ubufox
3.0-0ubuntu0.12.04.1
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.