![]() Click here to get in touch with our Linux expert. If you have trouble locating the policy file or are not sure of making the changes, it is best to have the server audited by a server admin. In Ubuntu and Debian systems, the file /etc/ImageMagick/policy.xml need to be edited, and the following changes need to be made to the “” section: If you have older CentOS or RHEL servers, it is best to have it audited by a server admin. Rename the files by: # mv mvg.so mvg.so_bak usr/lib/ImageMagick-6.2.8/modules-Q16/coders/ in 32 bit servers usr/lib64/ImageMagick-6.2.8/modules-Q16/coders/ in 64 bit servers In RHEL/CentOS 5, the files “mvg.so”, “msl.so”, and “label.so” need to be made inaccessible. In RHEL/CentOS 6 and 7, the file /etc/ImageMagick/policy.xml should be edited, and the following changes need to be made to the “” section: Then reload CageFS using: cagefsctl -force-update CentOS/RedHat opt/cloudlinux/lib/ImageMagick-6.5.4/config/policy.xml opt/alt/alt-ImageMagick/etc/ImageMagick-6/policy.xml So, follow the below steps to force all accounts to reload the new ImageMagick policy file: In CloudLinux servers that has CageFS enabled, a copy of the policy file may be present in each individual’s environment. If it is installed, follow the steps for your OS as mentioned under the relevant section in this article. You can check if you have ImageMagick installed in your DA server using the command:įor RedHat/CentOS # rpm -qa | grep -i image DirectAdminĭirectAdmin has not yet released a custom advisory about this vulnerability. ![]() You can check if you have ImageMagick installed in your Plesk server using the command:įor RedHat/CentOS/CloudLinux # rpm -qa | grep -i imageįor Ubuntu/Debian # dpkg -l | grep -i image Plesk has not yet released a custom advisory about this vulnerability. If you’ve custom installed ImageMagick, the policy file would be in some other location such as “/etc/ImageMagick/policy.xml” (in RedHat systems). You can do so by editing the file “/usr/local/cpanel/3rdparty/etc/ImageMagick-6/policy.xml”, and making the following changes in the “” section: If you have an older version of cPanel, you may want to manually fix this. Then enter “ mitigate_imagemagick_cve” under “Enter Script Name”. You can also do that using WHM by adding “/scripts2/autofixer” to your WHM URL: To apply the patch, run the autorepair script in the terminal: # /scripts/autorepair mitigate_imagemagick_cve cPanel/WHMĬPanel has already released patches for this vulnerability. Shutdown all web services and restart to apply the changes. For this, edit the policy.xml file (usually located in /etc/) and add the following lines in it: ImageMagick has not released a patch yet, but a work around has been suggested to prevent automatic processing of non-standard image formats (like JPG, GIF, etc.). General fix for all ImageMagick installations As of this writing, there are confirmed server hacks using exploits already in public domain, and it is best to secure your server ASAP. ImageMagick is widely used to process images, and is a part of PHP, Ruby, Node.Js, Python and many other language libraries. Official patches are due to be distributed over the weekend, but may take longer to enter your distributions package manager.On May 3rd, ImageMagick disclosed a serious Remote Code Execution vulnerablity ( CVE-2016–3714) that allows attackers to execute malware hidden in image uploads. convert -list policyįor more details on the problem, check out the ArsTechnica post here, and the ImageMagick forum announcement on the subject here. Now re-run the first step to make sure the policy has been loaded properly. If you’re told you don’t have write permissions try closing the file and opening it again with sudo. Remember it’s Ctrl + x to exit nano and you do want to save the changes. Alternatively here’s the code at time of writing: The current reccomended settings related to the vulnerability are here: It’s best to check this URL for the latest version. In other operating systems your best bet is to run a find: find /usr | grep "policy.xml" 3. In Debian, you can find the ImageMagick policy file in /etc/ImageMagick: nano /etc/ImageMagick/policy.xml There will almost certainly be none returned if you’ve not configured any previously. Check loaded Imagick policiesįrom a terminal, check to see if any policies are loaded. While official patches are being worked on, this is a reccomended workaround to secure ImageMagick on Debian. ![]() As Arstechnica have recently reported, there is a critical security vulnerability in ImageMagick, an image processing library used by many websites.
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