Ubuntu 2861-1: libpng vulnerabilities

    Date06 Jan 2016
    CategoryUbuntu
    76
    Posted ByLinuxSecurity Advisories
    libpng could be made to crash or run programs as your login if it opened a specially crafted file.
    ==========================================================================
    Ubuntu Security Notice USN-2861-1
    January 06, 2016
    
    libpng vulnerabilities
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 15.10
    - Ubuntu 15.04
    - Ubuntu 14.04 LTS
    - Ubuntu 12.04 LTS
    
    Summary:
    
    libpng could be made to crash or run programs as your login if it opened a
    specially crafted file.
    
    Software Description:
    - libpng: PNG (Portable Network Graphics) file library
    
    Details:
    
    It was discovered that libpng incorrectly handled certain small bit-depth
    values. If a user or automated system using libpng were tricked into
    opening a specially crafted image, an attacker could exploit this to cause
    a denial of service or execute code with the privileges of the user
    invoking the program. (CVE-2015-8472)
    
    Qixue Xiao and Chen Yu discovered that libpng incorrectly handled certain
    malformed images. If a user or automated system using libpng were tricked
    into opening a specially crafted image, an attacker could exploit this to
    cause a denial of service. (CVE-2015-8540)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 15.10:
      libpng12-0                      1.2.51-0ubuntu3.15.10.2
    
    Ubuntu 15.04:
      libpng12-0                      1.2.51-0ubuntu3.15.04.2
    
    Ubuntu 14.04 LTS:
      libpng12-0                      1.2.50-1ubuntu2.14.04.2
    
    Ubuntu 12.04 LTS:
      libpng12-0                      1.2.46-3ubuntu4.2
    
    After a standard system update you need to restart your session to make
    all the necessary changes.
    
    References:
      http://www.ubuntu.com/usn/usn-2861-1
      CVE-2015-8472, CVE-2015-8540
    
    Package Information:
      https://launchpad.net/ubuntu/+source/libpng/1.2.51-0ubuntu3.15.10.2
      https://launchpad.net/ubuntu/+source/libpng/1.2.51-0ubuntu3.15.04.2
      https://launchpad.net/ubuntu/+source/libpng/1.2.50-1ubuntu2.14.04.2
      https://launchpad.net/ubuntu/+source/libpng/1.2.46-3ubuntu4.2
    
    
    
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