USN-1729-2: Firefox regression

1 March 2013

firefox regression

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

  • Ubuntu 12.10
  • Ubuntu 12.04 LTS
  • Ubuntu 11.10

Summary

Due to a regression, Firefox might crash or freeze under normal use.

Software Description

  • firefox - Mozilla Open Source web browser

Details

USN-1729-1 fixed vulnerabilities in Firefox. This update introduced a regression which sometimes resulted in freezes and crashes when using multiple tabs with images displayed. This update fixes the problem.

We apologize for the inconvenience.

Original advisory details:

Olli Pettay, Christoph Diehl, Gary Kwong, Jesse Ruderman, Andrew McCreight, Joe Drew, Wayne Mery, Alon Zakai, Christian Holler, Gary Kwong, Luke Wagner, Terrence Cole, Timothy Nikkel, Bill McCloskey, and Nicolas Pierron 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. (CVE-2013-0783, CVE-2013-0784)

Atte Kettunen discovered that Firefox could perform an out-of-bounds read while rendering GIF format images. An attacker could exploit this to crash Firefox. (CVE-2013-0772)

Boris Zbarsky discovered that Firefox did not properly handle some wrapped WebIDL objects. If the user were tricked into opening a specially crafted page, an attacker could possibly exploit this to cause a denial of service via application crash, or potentially execute code with the privileges of the user invoking Firefox. (CVE-2013-0765)

Bobby Holley discovered vulnerabilities in Chrome Object Wrappers (COW) and System Only Wrappers (SOW). If a user were tricked into opening a specially crafted page, a remote attacker could exploit this to bypass security protections to obtain sensitive information or potentially execute code with the privileges of the user invoking Firefox. (CVE-2013-0773)

Frederik Braun discovered that Firefox made the location of the active browser profile available to JavaScript workers. (CVE-2013-0774)

A use-after-free vulnerability was discovered in Firefox. An attacker could potentially exploit this to execute code with the privileges of the user invoking Firefox. (CVE-2013-0775)

Michal Zalewski discovered that Firefox would not always show the correct address when cancelling a proxy authentication prompt. A remote attacker could exploit this to conduct URL spoofing and phishing attacks. (CVE-2013-0776)

Abhishek Arya discovered several problems related to memory handling. 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-2013-0777, CVE-2013-0778, CVE-2013-0779, CVE-2013-0780, CVE-2013-0781, CVE-2013-0782)

Update instructions

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

Ubuntu 12.10
firefox - 19.0+build1-0ubuntu0.12.10.2
Ubuntu 12.04 LTS
firefox - 19.0+build1-0ubuntu0.12.04.2
Ubuntu 11.10
firefox - 19.0+build1-0ubuntu0.11.10.2

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