Ubuntu 2723-1: Firefox vulnerabilities

    Date27 Aug 2015
    CategoryUbuntu
    352
    Posted ByLinuxSecurity Advisories
    Firefox could be made to crash or run programs as your login if it opened a malicious website.
    ==========================================================================
    Ubuntu Security Notice USN-2723-1
    August 27, 2015
    
    firefox vulnerabilities
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - 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:
    
    A use-after-free was discovered when resizing a canvas element during
    restyling 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-2015-4497)
    
    Bas Venis discovered that the addon install permission prompt could be
    bypassed using data: URLs in some circumstances. It was also discovered
    that the installation notification could be made to appear over another
    site. If a user were tricked in to opening a specially crafted website, an
    attacker could potentially exploit this to install a malicious addon.
    (CVE-2015-4498)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 15.04:
      firefox                         40.0.3+build1-0ubuntu0.15.04.1
    
    Ubuntu 14.04 LTS:
      firefox                         40.0.3+build1-0ubuntu0.14.04.1
    
    Ubuntu 12.04 LTS:
      firefox                         40.0.3+build1-0ubuntu0.12.04.1
    
    After a standard system update you need to restart Firefox to make
    all the necessary changes.
    
    References:
      http://www.ubuntu.com/usn/usn-2723-1
      CVE-2015-4497, CVE-2015-4498
    
    Package Information:
      https://launchpad.net/ubuntu/+source/firefox/40.0.3+build1-0ubuntu0.15.04.1
      https://launchpad.net/ubuntu/+source/firefox/40.0.3+build1-0ubuntu0.14.04.1
      https://launchpad.net/ubuntu/+source/firefox/40.0.3+build1-0ubuntu0.12.04.1
    
    
    
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