Tag Archives: Linux

Polkit vulnerability provides local privilege escalation bypass

Many of the Linux distros are vulnerable to the Polkit exploit. This vulnerability provides a local privilege escalation bypass. A hacker can easily obtain root access with this vulnerability. The vulnerability was recently discovered by GitHub Security Lab security researcher Kevin Backhouse. The vulnerability CVE-2021-3560 was publicly disclosed, and a fix was released on June 3, 2021. Make sure…

Read More

Docker Tutorials

How to Install Docker on Ubuntu 20.04

In this tutorial you will be shown how to install Docker onto Ubuntu 20.04. Docker is an open source platform that simplifies the process of building, running, managing and distributing applications. It does this by virtualizing the operating system of the computer on which it is installed and running.   [embedyt]https://www.youtube.com/watch?v=a-SRjzgL_6k&width=425&height=250[/embedyt]   Lets Get Started! Prerequisites…

Read More

UniFi Tutorials

Configure Unifi Controller Ports On Ubuntu 20.04

In this tutorial you will be shown how to configure Ubuntu 20.04’s Uncomplicated Firewall (ufw) with the necessary Unifi Controller ports.  [embedyt]https://www.youtube.com/watch?v=rwOSXBRewLs&width=425&height=250[/embedyt] Lets Get Started First make sure that you have already have your Unifi Controller Installed and working. Log into your Ubuntu 20.04 using putty via SSH. We will now configure a proper firewall…

Read More

Jetty Vulnerability using Invalid Large TLS Frame causes 100% CPU Usage

This Jetty vulnerability is to be considered as a service availability issue. When using SSL/TLS with Jetty, either with HTTP/1.1, HTTP/2, or WebSocket, the server may receive an invalid large (greater than 17408) TLS frame that is incorrectly handled, causing CPU resources to eventually reach 100% usage.  The following packages have been upgraded to a…

Read More

UniFi Tutorials

Install SSL Certificate Onto A FQDN UniFi Controller

In this tutorial you will be shown how to install SSL Certificate onto a FQDN (fully qualified domain name) UniFi Controller installed on Ubuntu 20.04.  [embedyt]https://www.youtube.com/watch?v=sta68NQxZyE&width=425&height=250[/embedyt] Lets Get Started  SSH onto your Ubuntu Linux Server Make sure your server is fully up to date with patches. Check and see what type of pre-existing firewall your…

Read More

Create Website Server With Linode and Hestia Control Panel

In this tutorial I will be showing you how to use Linode, Ubuntu 20.04 and Hestia Control Panel to create yourself a website server. This is a much better option than using shared website hosting servers where compromised website server incidents can happen due to improper maintained webservers and websites.  [embedyt]https://www.youtube.com/watch?v=Spj4ntZ_rsI&width=425&height=250[/embedyt] Lets Create Your Domain….

Read More