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How do I check if my Linux system is vulnerable to Specter / Meltdown?


INTEL ™ Devices from 1995 running Linux, Windows or MACOS are affected by Spectre and Meltdown vulnerabilities as much as their counterparts. AMD ™ is not affected by Meltdown, which is the most serious bug. On the other hand, AMD ś processors are vulnerable to Spectre.

First of all, make sure your Debian 8 or 9 version has an updated kernel and you have installed the latest security fixes.

Start by adding the following in /etc/apt/sources.list, using gedit to open the file.

sudo gedit /etc/apt/sources.list

Press Enter.

Copy the below row if it is not already in the list and save it.

deb http://security.debian.org/debian-security stretch/updates main contrib non-free

Then run the following commands:

sudo apt-get update && apt-get upgrade

To check if your system is vulnerable, download Spectre & Meltdown Checker.


Download the latest kernel Linux 4.15.0-1-amd64 #1 SMP Debian 4.15.4-1 (2018-02-18) x86_64 GNU/Linux.

cd downloads
dpkg -i linux-image-4.15.0-1-amd64_4.15.4-1_amd64.deb

Press Enter.

Type exit and enter to return to your regular user ( NOT superuser = root ).

Restart the computer.

Open a terminal window and type:

uname -a

Press Enter,

About Linux 4.15.0-1-amd64 # 1 SMP Debian 4.15.4-1 (2018-02-18) x86_64 GNU / Linux is now safe with Specter 1 & 2 and Meltdown.

Make sure you are safe:

Open a terminal window and type:

cd downloads

Packa upp spectre-meltdown-checker-master.zip

Enter the folder:

cd spectre-meltdown-checker-master


Make the file have executable rights:

chmod +x spectre-meltdown-checker.sh

Iniciate the script:

sudo sh spectre-meltdown-checker.sh

The script checks each variation individually and lists its results. If you get "status: vulnerable" the system is vulnerable to that variant. The controls for Specter variant 2 and Meltdown reveal additional information.

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