Category Archives: Linux

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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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“PwnKit” security bug gets you root on most Linux distros – what to do

January 26 2022 By Paul Ducklin in Linux, Security, Vulnerability

An elevation of privilege bug that could let a "mostly harmless" user give themselves a instant root shell

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“PwnKit” security bug gets you root on most Linux distros – what to do

January 26 2022 By Paul Ducklin in Linux, Security, Vulnerability

An elevation of privilege bug that could let a "mostly harmless" user give themselves a instant root shell

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Linux-Targeted Malware Increased by 35%

January 24 2022 By Bruce Schneier in Linux, Malware, Security

Crowdstrike is reporting that malware targeting Linux has increased considerably in 2021:

Malware targeting Linux systems increased by 35% in 2021 compared to 2020.

XorDDoS, Mirai and Mozi malware families...

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S3 Ep66: Cybercrime busts, wormable Windows, and the crisis of featuritis [Podcast + Transcript]

January 20 2022 By Paul Ducklin in Apple, Cryptography, Cybercrime, iOS, Law & order, Linux, Microsoft, Podcast, Security, Vulnerability, Windows

Latest epsiode - listen now!

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Serious Security: Linux full-disk encryption bug fixed – patch now!

January 14 2022 By Paul Ducklin in Cryptography, Linux, Security

Imagine if someone who didn't have your password could sneakily modify data that was encrypted with it.

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