Ubuntu 15.10 USN-2861-1 Moderate: Libpng Denial Of Service

ubuntu

January 6, 2016

libpng could be made to crash or run programs as your login if it opened a specially crafted file.

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)

Topics Covered

security advisory denial of service libpng update instructions ubuntu

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.