Ubuntu Update for Linux kernel vulnerabilities USN-1638-3

Please Install the Updated Packages.

USN-1638-1 fixed vulnerabilities in Firefox. The new packages introduced regressions in cookies handling and the User Agent string. This update fixes the problem. Original advisory details: Gary Kwong, Jesse Ruderman, Christian Holler, Bob Clary, Kyle Huey, Ed Morley, Chris Lord, Boris Zbarsky, Julian Seward, Bill McCloskey, and Andrew McCreight discovered multiple memory safety issues affecting Firefox. If the user were tricked into opening a specially crafted page, an attacker could possibly exploit these to cause a denial of service via application crash, or potentially execute code with the privileges of the user invoking Firefox. (CVE-2012-5842, CVE-2012-5843) Atte Kettunen discovered a buffer overflow while rendering GIF format images. An attacker could exploit this to possibly execute arbitrary code as the user invoking Firefox. (CVE-2012-4202) It was discovered that the evalInSandbox function's JavaScript sandbox context could be circumvented. An attacker could exploit this to perform a cross-site scripting (XSS) attack or steal a copy of a local file if the user has installed an add-on vulnerable to this attack. With cross-site scripting vulnerabilities, if a user were tricked into viewing a specially crafted page, a remote attacker could exploit this to modify the contents, or steal confidential data, within the same domain. (CVE-2012-4201) Jonathan Stephens discovered that combining vectors involving the setting of Cascading Style Sheets (CSS) properties in conjunction with SVG text could cause Firefox to crash. If a user were tricked into opening a malicious web page, an attacker could cause a denial of service via application crash or execute arbitrary code with the privliges of the user invoking the program. (CVE-2012-5836) It was discovered that if a javascript: URL is selected from the list of Firefox &quot new tab&quot page, the script will inherit the privileges of the privileged &quot new tab&quot page. This allows for the execution of locally installed programs if a user can be convinced to save a bookmark of a malicious javascript: URL. (CVE-2012-4203) Scott Bell discovered a memory corruption issue in the JavaScript engine. If a user were tricked into opening a malicious website, an attacker could exploit this to execute arbitrary JavaScript code within the context of another website or arbitrary code as the user invoking the program. (CVE-2012-4204) Gabor Krizsanits discovered that XMLHttpRequest objects created w ... Description truncated, for more information please check the Reference URL

firefox on Ubuntu 12.10 , Ubuntu 12.04 LTS , Ubuntu 11.10 , Ubuntu 10.04 LTS