7.5 - USN-2602-1

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

- Ubuntu 15.04 - Ubuntu 14.10 - 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:

Jesse Ruderman, Mats Palmgren, Byron Campen, Steve Fink, Gary Kwong, Andrew McCreight, Christian Holler, Jon Coppeard, and Milan Sreckovic 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-2015-2708, CVE-2015-2709)

Atte Kettunen discovered a buffer overflow during the rendering of SVG content with certain CSS properties 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-2015-2710)

Alex Verstak discovered that is ignored in some circumstances. (CVE-2015-2711)

Dougall Johnson discovered an out of bounds read and write in asm.js. If a user were tricked in to opening a specially crafted website, an attacker could potentially exploit this to obtain sensitive information, cause a denial of service via application crash, or execute arbitrary code with the privileges of the user invoking Firefox. (CVE-2015-2712)

Scott Bell discovered a use-afer-free during the processing of text when vertical text is enabled. 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-2015-2713)

Tyson Smith and Jesse Schwartzentruber discovered a use-after-free during shutdown. 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-2015-2715)

Ucha Gobejishvili discovered a buffer overflow when parsing compressed XML content. 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-2015-2716)

A buffer overflow and out-of-bounds read were discovered when parsing metadata in MP4 files 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-2015-2717)

Mark Hammond discovered that when a trusted page is hosted within an iframe in an untrusted page, the untrusted page can intercept webchannel responses meant for the trusted page in some circumstances. If a user were tricked in to opening a specially crafted website, an attacker could exploit this to bypass origin restrictions. (CVE-2015-2718)

Update instructions:

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

Ubuntu 15.04:
firefox 38.0+build3-0ubuntu0.15.04.1

Ubuntu 14.10:
firefox 38.0+build3-0ubuntu0.14.10.1

Ubuntu 14.04 LTS:
firefox 38.0+build3-0ubuntu0.14.04.1

Ubuntu 12.04 LTS:
firefox 38.0+build3-0ubuntu0.12.04.1

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

References:
http://www.ubuntu.com/usn/usn-2602-1
CVE-2015-2708, CVE-2015-2709, CVE-2015-2710, CVE-2015-2711,
CVE-2015-2712, CVE-2015-2713, CVE-2015-2715, CVE-2015-2716,
CVE-2015-2717, CVE-2015-2718

Package Information:
https://launchpad.net/ubuntu/+source/firefox/38.0+build3-0ubuntu0.15.04.1
https://launchpad.net/ubuntu/+source/firefox/38.0+build3-0ubuntu0.14.10.1
https://launchpad.net/ubuntu/+source/firefox/38.0+build3-0ubuntu0.14.04.1
https://launchpad.net/ubuntu/+source/firefox/38.0+build3-0ubuntu0.12.04.1