Ubuntu 2702-3: Firefox regression

    Date20 Aug 2015
    CategoryUbuntu
    31
    Posted ByLinuxSecurity Advisories
    USN-2702-1 introduced a regression in Firefox.
    ==========================================================================
    Ubuntu Security Notice USN-2702-3
    August 20, 2015
    
    firefox regression
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 15.04
    - Ubuntu 14.04 LTS
    - Ubuntu 12.04 LTS
    
    Summary:
    
    USN-2702-1 introduced a regression in Firefox.
    
    Software Description:
    - firefox: Mozilla Open Source web browser
    
    Details:
    
    USN-2702-1 fixed vulnerabilities in Firefox. After upgrading, some users
    in the US reported that their default search engine switched to Yahoo.
    This update fixes the problem.
    
    We apologize for the inconvenience.
    
    Original advisory details:
    
     Gary Kwong, Christian Holler, Byron Campen, Tyson Smith, Bobby Holley,
     Chris Coulson, and Eric Rahm 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-2015-4473, CVE-2015-4474)
     
     Aki Helin discovered an out-of-bounds read when playing malformed MP3
     content in some circumstances. 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-2015-4475)
     
     A use-after-free was discovered during MediaStream playback 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
     priviliges of the user invoking Firefox. (CVE-2015-4477)
     
     André Bargull discovered that non-configurable properties on javascript
     objects could be redefined when parsing JSON. If a user were tricked in to
     opening a specially crafted website, an attacker could potentially exploit
     this to bypass same-origin restrictions. (CVE-2015-4478)
     
     Multiple integer overflows were discovered in libstagefright. 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-2015-4479, CVE-2015-4480, CVE-2015-4493)
     
     Jukka Jylänki discovered a crash that occurs because javascript does not
     properly gate access to Atomics or SharedArrayBuffers 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. (CVE-2015-4484)
     
     Abhishek Arya discovered 2 buffer overflows in libvpx when decoding
     malformed WebM content 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, or
     execute arbitrary code with the privileges of the user invoking Firefox.
     (CVE-2015-4485, CVE-2015-4486)
     
     Ronald Crane reported 3 security issues. If a user were tricked in to
     opening a specially crafted website, an attacker could potentially
     exploit these, in combination with another security vulnerability, to
     cause a denial of service via application crash, or execute arbitrary
     code with the privileges of the user invoking Firefox. (CVE-2015-4487,
     CVE-2015-4488, CVE-2015-4489)
     
     Christoph Kerschbaumer discovered an issue with Mozilla's implementation
     of Content Security Policy (CSP), which could allow for a more permissive
     usage in some cirucumstances. An attacker could potentially exploit this
     to conduct cross-site scripting (XSS) attacks. (CVE-2015-4490)
     
     Gustavo Grieco discovered a heap overflow in gdk-pixbuf. 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 priviliges of the user invoking
     Firefox. (CVE-2015-4491)
     
     Looben Yang discovered a use-after-free when using XMLHttpRequest with
     shared workers 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 priviliges of the user invoking Firefox. (CVE-2015-4492)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 15.04:
      firefox                         40.0+build4-0ubuntu0.15.04.4
    
    Ubuntu 14.04 LTS:
      firefox                         40.0+build4-0ubuntu0.14.04.4
    
    Ubuntu 12.04 LTS:
      firefox                         40.0+build4-0ubuntu0.12.04.4
    
    After a standard system update you need to restart Firefox to make
    all the necessary changes.
    
    References:
      http://www.ubuntu.com/usn/usn-2702-3
      http://www.ubuntu.com/usn/usn-2702-1
      https://launchpad.net/bugs/1485741
    
    Package Information:
      https://launchpad.net/ubuntu/+source/firefox/40.0+build4-0ubuntu0.15.04.4
      https://launchpad.net/ubuntu/+source/firefox/40.0+build4-0ubuntu0.14.04.4
      https://launchpad.net/ubuntu/+source/firefox/40.0+build4-0ubuntu0.12.04.4
    
    
    
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