Santhi A

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SSH Gateway: Secure Privileged Access to Linux Servers

What Is an SSH Gateway? A Complete Guide to Centralized Secure SSH Access Introduction As organizations expand their infrastructure across cloud platforms, on-premises data centers, and hybrid environments, securing administrative access becomes increasingly complex. Administrators often require secure access to hundreds or even thousands of Linux servers, network devices, and cloud instances. Traditional methods such

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Copy Fail (CVE-2026-31431): Linux Privilege Escalation — Detection, Patches & Mitigation

What Is Copy Fail(CVE-2026-31431) local privilege escalation (LPE) vulnerability ? Copy Fail (CVE-2026-31431) is a high-severity local privilege escalation (LPE) vulnerability in the Linux kernel’s cryptographic subsystem. Disclosed publicly on April 29, 2026 by security research firm Theori, it allows any unprivileged local user to escalate to root using a 732-byte Python script — with

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Linux Kernel “Dirty Frag” Privilege Escalation Vulnerability: What You Need to Know

What is the Dirty Frag Vulnerability? Dirty Frag is a high-severity local privilege escalation (LPE) vulnerability chain affecting the Linux kernel. Publicly disclosed on May 7, 2026, it allows an unprivileged local user to gain full root access on a wide range of Linux distributions — in a single command. The vulnerability was discovered and

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SSHStalker: A deep dive into the new IRC-controlled Linux botnet infecting thousands of servers

In early 2026, cybersecurity researchers uncovered a stealthy Linux botnet operation that has infected nearly 7,000 servers worldwide — not with advanced AI or zero-day exploits — but by resurrecting old-school techniques: SSH brute-force compromise, decade-old Linux vulnerabilities, and text-based IRC (Internet Relay Chat) command-and-control (C2) communication. Dubbed SSHStalker, this campaign staggering in scale highlights

dropbear Critical Privilege Escalation Vulnerability

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Critical Privilege Escalation Vulnerability Discovered in Dropbear SSH Server

The open-source Dropbear SSH server, widely deployed on embedded devices, routers, and lightweight systems like OpenWRT, has been found to contain a serious privilege escalation flaw. This vulnerability could allow an authenticated user to execute arbitrary programs with root privileges — essentially giving them full control over the system. This flaw is tracked as CVE-2025-14282

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Dropbear: A Lightweight SSH Solution

What is Dropbear SSH? Created by Matt Johnston, Dropbear is a relatively small SSH 2 server and client. It is designed to replace OpenSSH in environments where memory and processor resources are limited. Unlike OpenSSH, which is a massive suite of tools, Dropbear is often compiled as a single multi-call binary. This single file can

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SSH Tunneling: A Complete Guide to Secure Network Access

Introduction In today’s interconnected world, securing data as it travels across networks is more important than ever. Whether you’re accessing a remote server, managing databases, or working from an untrusted network, exposed connections can become easy targets for attackers. SSH tunneling offers a powerful yet lightweight solution by encrypting network traffic and safely forwarding it

Access Control in cyber security: types and benefits

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Access Control: Types and Benefits

Access control is one of the most fundamental pillars of cybersecurity and operational governance in any organization. It defines who can access specific systems, applications, data, or physical resources, ensuring that only authorized individuals can perform permitted actions. Proper access control is essential for protecting sensitive information, maintaining business continuity, and meeting regulatory obligations.

Author: Santhi A