Category Archives: Linux

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Linux gets double-quick double-update to fix kernel Oops!

March 13 2023 By Paul Ducklin in Linux, Security

Linux doesn't BSoD. It has oopses and panics instead. (We show you how to make a kernel module to explore further.)

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Serious Security: How to improve cryptography, resist supply chain attacks, and handle data breaches

January 4 2023 By Paul Ducklin in Cryptography, Cybercrime, Linux, machine learning, Malware, Podcast, Security, Vulnerability

Lessons for us all: improve cryptography, fight cybercrime, own your supply chain... and don't steal my data and then pretend you're sorry.

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PyTorch: Machine Learning toolkit pwned from Christmas to New Year

January 1 2023 By Paul Ducklin in Linux, machine learning, Malware, Security

The bad news: the crooks have your SSH private keys. The good news: only users of the "nightly" build were affected.

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New Linux Cryptomining Malware

September 12 2022 By Bruce Schneier in Linux, Malware, Security

It’s pretty nasty:

The malware was dubbed “Shikitega” for its extensive use of the popular Shikata Ga Nai polymorphic encoder, which allows the malware to “mutate” its code...

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Symbiote Backdoor in Linux

June 22 2022 By Bruce Schneier in Linux, Malware, Security

Interesting:

What makes Symbiote different from other Linux malware that we usually come across, is that it needs to infect other running processes to inflict damage on infected machines....

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Linux Improves Its Random Number Generator

March 24 2022 By Bruce Schneier in Linux, Security

In kernel version 5.17, both /dev/random and /dev/urandom have been replaced with a new — identical — algorithm based on the BLAKE2 hash function, which is an excellent security...

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S3 Ep73: Ransomware with a difference, dirty Linux pipes, and much more [Podcast]

March 10 2022 By Paul Ducklin in Cybercrime, Linux, Mozilla, Podcast, Ransomware, Security

Latest episode - listen now!

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“Dirty Pipe” Linux kernel bug lets anyone write to any file

March 8 2022 By Paul Ducklin in Android, Google, Linux, Security, Vulnerability

Even read-only files can be written to, leading to a dangerously general purpose elevation-of-privilege attack.

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Linux kernel patches “performance can be harmful” bug in video driver

February 1 2022 By Paul Ducklin in Linux, Security, Vulnerability

This bug is fiendishly hard to exploit - but if you patch, it won't be there to exploit at all.

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Twelve-Year-Old Linux Vulnerability Discovered and Patched

January 31 2022 By Bruce Schneier in Linux, privilege escalation, Security, vulnerabilities

It’s a privilege escalation vulnerability:

Linux users on Tuesday got a major dose of bad news — a 12-year-old vulnerability in a system tool called Polkit gives attackers unfettered...

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