============================================================================ 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