➠ USN-2833-1: Firefox vulnerabilities

Ubuntu Security Notice USN-2833-1

15th December, 2015

firefox vulnerabilities

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

• Ubuntu 15.10
• Ubuntu 15.04
• Ubuntu 14.04 LTS
• Ubuntu 12.04 LTS

Summary

Firefox could be made to crash or run programs as your login if it opened a malicious website.

Software description

• firefox - Mozilla Open Source web browser

Details

Andrei Vaida, Jesse Ruderman, Bob Clary, Christian Holler, Jesse Ruderman,
Eric Rahm, Robert Kaiser, Harald Kirschner, and Michael Henretty
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-2015-7201, CVE-2015-7202)

Ronald Crane discovered three buffer overflows through code inspection.
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-2015-7203, CVE-2015-7220, CVE-2015-7221)

Cajus Pollmeier discovered a crash during javascript variable assignments
in some circumstances. If a user were tricked in to opening a specially
crafted website, an attacker could potentially exploit this to execute
arbitrary code with the privileges of the user invoking Firefox.
(CVE-2015-7204)

Ronald Crane discovered a buffer overflow through code inspection. 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-2015-7205)

It was discovered that it is possible to read cross-origin URLs following
a redirect if performance.getEntries() is used with an iframe to host a
page. If a user were tricked in to opening a specially crafted website, an
attacker could potentially exploit this to bypass same-origin
restrictions. (CVE-2015-7207)

It was discovered that Firefox allows for control characters to be set in
cookies. An attacker could potentially exploit this to conduct cookie
injection attacks on some web servers. (CVE-2015-7208)

Looben Yang discovered a use-after-free in WebRTC when closing channels 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-2015-7210)

Abdulrahman Alqabandi discovered that hash symbol is incorrectly handled
when parsing data: URLs. An attacker could potentially exploit this to
conduct URL spoofing attacks. (CVE-2015-7211)

Abhishek Arya discovered an integer overflow when allocating large
textures. 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-2015-7212)

Ronald Crane dicovered an integer overflow when processing MP4 format
video 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-2015-7213)

Tsubasa Iinuma discovered a way to bypass same-origin restrictions using
data: and view-source: URLs. If a user were tricked in to opening a
specially crafted website, an attacker could potentially exploit this to
obtain sensitive information and read local files. (CVE-2015-7214)

Masato Kinugawa discovered a cross-origin information leak in error events
in web workers. An attacker could potentially exploit this to obtain
sensitive information. (CVE-2015-7215)

Gustavo Grieco discovered that the file chooser crashed on malformed
images due to flaws in the Jasper library. 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-2015-7216, CVE-2015-7217)

Stuart Larsen discoverd two integer underflows when handling malformed
HTTP/2 frames in some circumstances. 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. (CVE-2015-7218,
CVE-2015-7219)

Gerald Squelart discovered an integer underflow in the libstagefright
library when parsing MP4 format video 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-2015-7222)

Kris Maglione discovered a mechanism where web content could use
WebExtension APIs to execute code with the privileges of a particular
WebExtension. If a user were tricked in to opening a specially crafted
website with a vulnerable extension installed, an attacker could
potentially exploit this to obtain sensitive information or conduct
cross-site scripting (XSS) attacks. (CVE-2015-7223)

Update instructions

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

Ubuntu 15.10:

firefox 43.0+build1-0ubuntu0.15.10.1

Ubuntu 15.04:

firefox 43.0+build1-0ubuntu0.15.04.1

Ubuntu 14.04 LTS:

firefox 43.0+build1-0ubuntu0.14.04.1

Ubuntu 12.04 LTS:

firefox 43.0+build1-0ubuntu0.12.04.1

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.

References

CVE-2015-7201, CVE-2015-7202, CVE-2015-7203, CVE-2015-7204, CVE-2015-7205, CVE-2015-7207, CVE-2015-7208, CVE-2015-7210, CVE-2015-7211, CVE-2015-7212, CVE-2015-7213, CVE-2015-7214, CVE-2015-7215, CVE-2015-7216, CVE-2015-7217, CVE-2015-7218, CVE-2015-7219, CVE-2015-7220, CVE-2015-7221, CVE-2015-7222, CVE-2015-7223