1. Ubuntu Security Notices
  2. USN-3389-1

USN-3389-1: GD vulnerability

Publication date

14 August 2017

Overview

The system could be made to expose sensitive information.

Releases

Packages

  • libgd2 - GD Graphics Library

Details

A vulnerability was discovered in GD Graphics Library (aka libgd),
as used in PHP that does not zero colorMap arrays before use.
A specially crafted GIF image could use the uninitialized tables to
read bytes from the top of the stack.

A vulnerability was discovered in GD Graphics Library (aka libgd),
as used in PHP that does not zero colorMap arrays before use.
A specially crafted GIF image could use the uninitialized tables to
read bytes from the top of the stack.

Update instructions

In general, a standard system update will 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
17.04 zesty libgd-tools –  2.2.4-2ubuntu0.2
16.04 xenial libgd-tools –  2.1.1-4ubuntu0.16.04.7
14.04 trusty libgd-tools –  2.1.0-3ubuntu0.7

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References

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