A person can endure hardship, but two cannot; otherwise, one might think the hardship is caused by the other. Introduction A security incident report from a major cloud provider last year indicated that over 40% of system intrusions began with incorrect permission configurations. Just last month, I personally experienced such a crisis—a seemingly simple SSH … Read more
The classic Bash fork bomb command, which causes the system to crash by exhausting system resources: .(){ .|.&};. The way this command works is by recursively creating new processes to exhaust system resources: .() defines a function named . The function content .|.& means: call itself (.) to create a child process through a pipe … Read more
转自：IT之家 🛡️ Complete Guide to Linux Server Security: Building a Fortress from Scratch 💡 Introduction: As a DevOps engineer, I have seen too many servers compromised due to improper security configurations. This article will share my practical experience accumulated over the years, teaching you how to build a complete Linux server security protection system. 🚨 … Read more
🚨 2025 Linux Security Threat Report: 10 Risks Every Operations Engineer Must Know Introduction: As an engineer with 8 years of experience in Linux operations, I have witnessed countless production incidents caused by security negligence. In 2025, the threats facing Linux are more complex and covert than ever before. This article will deeply analyze the … Read more
In the field of cybersecurity, technological innovations always come with new risks. In this episode, David Bombal’s video titled “AI Malware Hiding in Cute Panda Pics?!” reveals how hackers exploit AI-generated images and Polyglot file techniques to hide malicious code within seemingly harmless images, even bypassing traditional security detection to attack Linux systems. This article … Read more
SecureLayer7’s security researchers have released technical details and proof of concept (POC) for the security vulnerability CVE-2025-6019, which affects Linux distributions relying on the udisksd daemon and libblockdev backend, including Fedora and SUSE. This vulnerability allows users in the allow_active group to gain root privileges through local privilege escalation (LPE), and it can be easily … Read more
链接：https://blog.csdn.net/2401_84578953/article/details/144244011? ☞The course by Liang Xu has completely exploded!☜ Everyone thinks that Linux is secure by default, and I generally agree (this is a controversial topic). Linux does indeed have a built-in security model. You need to enable it and customize it to achieve a more secure system. Linux is harder to manage, but correspondingly … Read more
The ARMO research team recently revealed significant flaws in Linux runtime security tools, confirming that the io_uring interface allows rootkits (kernel-level malware) to bypass conventional monitoring solutions.Tests show that mainstream tools, including Falco, Tetragon, and even Microsoft Defender for Endpoint, are unable to detect attacks utilizing this mechanism. 01 Technical Principles “This mechanism allows user-space … Read more