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AUSCERT External Security Bulletin Redistribution
ESB-2017.2027
LibGD vulnerability
15 August 2017
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: libgd2
Publisher: Ubuntu
Operating System: Ubuntu
Impact/Access: Access Confidential Data -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2017-7890
Reference: ESB-2017.2013
Original Bulletin:
https://www.ubuntu.com/usn/usn-3389-1
https://www.ubuntu.com/usn/usn-3389-2
Comment: This bulletin contains two (2) Ubuntu security advisories.
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Ubuntu Security Notice USN-3389-1
August 14, 2017
libgd2 vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- - Ubuntu 17.04
- - Ubuntu 16.04 LTS
- - Ubuntu 14.04 LTS
Summary:
The system could be made to expose sensitive information.
Software Description:
- - libgd2: GD Graphics Library
Details:
A vulnerability was descovered in GD Graphics Library (aka libgd),
as used in PHP before 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:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 17.04:
 libgd-tools 2.2.4-2ubuntu0.2
Ubuntu 16.04 LTS:
 libgd-tools 2.1.1-4ubuntu0.16.04.7
Ubuntu 14.04 LTS:
 libgd-tools 2.1.0-3ubuntu0.7
In general, a standard system update will make all the necessary
changes.
References:
 https://www.ubuntu.com/usn/usn-3389-1
 CVE-2017-7890
Package Information:
 https://launchpad.net/ubuntu/+source/libgd2/2.2.4-2ubuntu0.2
 https://launchpad.net/ubuntu/+source/libgd2/2.1.1-4ubuntu0.16.04.7
 https://launchpad.net/ubuntu/+source/libgd2/2.1.0-3ubuntu0.7
==========================================================================
==========================================================================
Ubuntu Security Notice USN-3389-2
August 14, 2017
libgd2 vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- - Ubuntu 12.04 ESM
Summary:
The system could be made to expose sensitive information.
Software Description:
- - libgd2: GD Graphics Library
Details:
USN-3389-1 fixed a vulnerability in GD Graphics Library.
This update provides the corresponding update for Ubuntu 12.04 ESM.
Original advisory 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.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 12.04 ESM:
 libgd-tools 2.0.36~rc1~dfsg-6ubuntu2.5
In general, a standard system update will make all the necessary
changes.
References:
 https://www.ubuntu.com/usn/usn-3389-2
 https://www.ubuntu.com/usn/usn-3389-1
 CVE-2017-7890
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