1. Ubuntu Security Notices
  2. USN-2815-1

USN-2815-1: libpng vulnerabilities

Publication date

19 November 2015

Overview

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

Releases

Packages

  • libpng - PNG (Portable Network Graphics) file library

Details

Mikulas Patocka discovered that libpng incorrectly handled certain large
fields. If a user or automated system using libpng were tricked into
opening a specially crafted image, an attacker could exploit this to cause
libpng to crash, leading to a denial of service. This issue only affected
Ubuntu 12.04 LTS. (CVE-2012-3425)

Qixue Xiao discovered that libpng incorrectly handled certain time values.
If a user or automated system using libpng were tricked into opening a
specially crafted image, an attacker could exploit this to cause libpng to
crash, leading to a denial of service. (CVE-2015-7981)

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...

Mikulas Patocka discovered that libpng incorrectly handled certain large
fields. If a user or automated system using libpng were tricked into
opening a specially crafted image, an attacker could exploit this to cause
libpng to crash, leading to a denial of service. This issue only affected
Ubuntu 12.04 LTS. (CVE-2012-3425)

Qixue Xiao discovered that libpng incorrectly handled certain time values.
If a user or automated system using libpng were tricked into opening a
specially crafted image, an attacker could exploit this to cause libpng to
crash, leading to a denial of service. (CVE-2015-7981)

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-2015-8126)

Update instructions

After a standard system update you need to restart your session to make all the necessary changes.

Learn more about how to get the fixes.

The problem can be corrected by updating your system to the following package versions:

Ubuntu Release Package Version
15.10 wily libpng12-0 –  1.2.51-0ubuntu3.15.10.1
15.04 vivid libpng12-0 –  1.2.51-0ubuntu3.15.04.1
14.04 trusty libpng12-0 –  1.2.50-1ubuntu2.14.04.1
12.04 precise libpng12-0 –  1.2.46-3ubuntu4.1

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References

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