SOL25102203 - ImageMagick vulnerability CVE-2016-3716

Vulnerability Recommended Actions

If you are running a version listed in the Versions known to be vulnerable column, you can eliminate this vulnerability by upgrading to a version listed in theVersions known to be not vulnerable column. If the table lists only an older version than what you are currently running, or does not list a non-vulnerable version, then no upgrade candidate currently exists.

BIG-IP/BIG-IQ/Enterprise Manager

To mitigate this vulnerability, you can disable the vulnerable ImageMagick coders in the global policy file**/etc/ImageMagick/policy.xml**. To do so, perform the following procedure:

Impact of action: Performing the following procedure should not have a negative impact on your system.

1. Log in to the command line of the affected system.
2. Back up the ImageMagickglobal policy file by typing the following command:

cp -p /etc/ImageMagick/policy.xml /var/tmp/policy.xml.SOL25102203

3. Edit the ImageMagickglobal policy file using a text editor of your choice, for example vi.
4. Include the vulnerable ImageMagickcoders in the policymap stanza. For example, the vulnerable coders listed in CVE-2016-3716 is MSL, the modifiedpolicymap stanza should look similar to the following example:

<policymap>
<policy domain=“coder” rights=“none” pattern=“MSL” />
</policymap>

5. Save the changes and exit the text editor.

Supplemental Information

• SOL9970: Subscribing to email notifications regarding F5 products
• SOL9957: Creating a custom RSS feed to view new and updated documents
• SOL4602: Overview of the F5 security vulnerability response policy
• SOL4918: Overview of the F5 critical issue hotfix policy
• SOL03151140: ImageMagick vulnerability CVE-2016-3714
• SOL10550253: ImageMagick vulnerability CVE-2016-3715
• SOL29154575: ImageMagick vulnerability CVE-2016-3717
• SOL61974123: ImageMagick vulnerability CVE-2016-3718
• The Accelerating Images with Image Optimization chapter of the BIG-IP Acceleration: Implementations guide

Note: For information about how to locate F5 product guides, refer to SOL12453464: Finding product documentation on AskF5.