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Subject SecureBlue: A security-focused Linux operating system
Date Sun, 03 Aug 2025 13:41
A common misconception among both privacy and Linux communities is that
Linux is a secure operating system. It is not. In fact, it does not even come
close to a secure operating system. The motherfucker is not even in the same
galaxy as actual secure operating systems. The reality is that the security
architecture of desktop Linux is broadly and significantly lacking.
Linux was not created with security-in-mind, and the kernel itself is extremely
lacking in security. It's decades behind modern exploit mitigations, and common
'stable' distributions like Debian and Ubuntu freeze packages for a very, very,
very long time and miss a majority of security fixes. Frankly, this is
just embarrassing. Also, arguing that there is "less malware on Linux" does not
make it any safer. Malware for Linux does exist, and is quite easy to make.
___________________________________________
( The term "Linux" here is referring to a )
( "GNU/Linux" distribution or standard )
( desktop Linux operating system. )
-------------------------------------------
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SecureBlue is a security-focused desktop and server Linux operating system,
developed as an open-source project that substantially hardens operating system
images based on Fedora Atomic. Their images are not easily replaced by hand;
however, much of the hardening has already been done for you. Pretty sweet,
right? Their goal is to create a maximally secure Linux operating system, while
avoiding sacrificing usability as much as possible. This is awesome, because
often we have to sacrifice usability and performance for security *cough QubesOS.
___________________________________
( But what makes SecureBlue secure? )
-----------------------------------
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I'm an asshole, so I'll have the pleasure of boring you with this extremely
long, detailed and verbose explanation of each individual exploit mitigation and
feature including the full documentation.
Obviously, I'm joking. I'll keep this motherfucker short and sweet, I promise.
1. SecureBlue integrates hardened_malloc, a hardened memory allocator that
provides substantial hardening against heap corruption vulnerabilities.
2. SecureBlue includes their security-focused Chromium-based browser, Trivalent,
that includes desktop-relevant patches from GrapheneOS' Vanadium.
3. SecureBlue hardens the kernel via sysctl and kernel arguments.
4. SecureBlue allows the user to enable USBGuard, a software framework that
provides system protection against intrusive USB devices.
5. The user can lockdown their bash environment via SecureBlue provided setup
commands, which mitigates LD_PRELOAD attacks.
6. They include support for Secure Boot by default and without the hassle,
preventing malicious code from compromising the boot process.
Now, I could go over each and every individual mitigation and feature in depth
all day long if I really wanted to. But for your sake and my own, I won't!
If you're interested in SecureBlue, feel free to read the rest of their
documentation on the offical website. You can also contact myself or
join their Discord server to know more.
____________________________
( Who should use SecureBlue? )
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o ^__^
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Stellar question! SecureBlue is for those whose first priority is to use desktop
Linux, and second priority is security. If your first and absoloute prority is
security, SecureBlue may not be for you. Analyse your threat model before
deciding what is best for you.
