Can a Linux OS be infected from a browser?

I just read this article from Tom’s Guide. Popular Chrome extensions hijacked by hackers in widespread cyberattack — 3.2 million at risk | Tom's Guide. The one thing I love about Linux is that anti-virus is not needed. In fact that was what prompted to move over the first time, I was getting frustrated by the intrusion of AV software.

However this article got me asking the question above. If my browser becomes infected with a virus, can this do harm to the OS and any other software? Is my data safe? If it can, what do I need to check on to make sure I am safe?

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hmm, your concern is valid. While modern browsers sandbox extensions to limit their reach and isolate them from the underlying OS; an infected extension can still access sensitive browser data like cookies, history, and saved passwords. So there’s a slim chance it could even be a doorway for more malware.

Even though Linux isn’t as prone to traditional viruses, the risk of data theft or additional malware remains. Al bit it very unlikely. A balanced approach is to regularly review your extensions—removing those you don’t use or that request too many permissions—and keeping your browser updated.

I’m sure it works, but it’s certainly time-consuming and, given the still small target group, not in proportion to the effort involved.

I agree with @hydn, the best practices includes:

  • Frequently update your web browser
  • Frequently updates at last critical OS security fixes
  • Stay away from hamefoul websites
  • Be carefoul with installed extensions (for exaple I knew a person who was using an extension for syncing all it’s password on web browser. I don’t thik this is a good practice)

That’s all.

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That’s one good thing about my browsing setup so far. No extensions. My main browser right now is Firefox and I use two accounts to share passwords and sites between computers. I use Chrome to access Google Workspace and Microsoft Edge for Office 365.

So I am supposing my lack of extension use would increase my security.

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I had an extension ‘Nimble Capture’ which was the best tool I found to print a web-page to a PDF file, but a couple of months ago Chromium labelled it with ‘This extension contains malware.’ and wouldn’t let me use it any more.

Does this mean that threats that arise are being controlled, or could it be that another extension might be doing this detection, I wonder.

@AnthonyRKing Wow. Glad it was tagged. That warning likely came directly from Chromium’s own threat detection system.

They’ve been stepping up efforts to flag malicious or compromised extensions in the Chrome Web Store.

It’s a good sign that the ecosystem is being monitored, but it’s also a reminder that even “trusted” tools can turn rogue if the developer sells the extension or gets compromised.

Best to always check recent reviews, dev website, and update dates before trusting extensions.

@hydn I know there has been news about GitHub projects being hijacked. Are some of these plugins on GitHub, and could it be possible some get hijacked and thus become dangerous?

I was shocked to realise there was a problem with Nimble Capture, as there were so many reviews out there recommending it… and there still are.

I have now replaced it with the top-rated ‘GoFullPage’ extension.

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Indeed! Now that you mention that. I do see it listed. Thanks for updating the topic to confirm!