March 27th, 2020
Linux Hacking Case Studies Part 5: Building a Vulnerable Linux Server
This blog will share how to configure your own vulnerable Linux server so you can practice building and breaking at home.
March 26th, 2020
Linux Hacking Case Studies Part 4: Sudo Horror Stories
This blog will cover different ways to approach SSH password guessing and attacking sudo applications to gain a root shell on a Linux system.
March 25th, 2020
Linux Hacking Case Studies Part 3: phpMyAdmin
This blog will walkthrough how to attack insecure phpMyAdmin configurations and world writable files to gain a root shell on a Linux system.
March 24th, 2020
Linux Hacking Case Studies Part 2: NFS
This blog will walk through how to attack insecure NFS exports and setuid configurations in order to gain a root shell on a Linux system.
March 23rd, 2020
Linux Hacking Case Studies Part 1: Rsync
This blog will walk through how to attack insecure Rsync configurations in order to gain a root shell on a Linux system.
March 18th, 2020
Gaining AWS Console Access via API Keys
For adversarial scenarios, AWS console access is better than the APIs. We’ll walk you through our research process here, and release a new tool we’ve built! When there’s a will… We’re frequently asked by clients to test applications, networks and/or infrastructure hosted on Amazon Web Services (AWS). As a part of these assessments, we’ll oftentimes […]
February 20th, 2020
Azure Privilege Escalation Using Managed Identities
Azure Managed Identities are Azure AD objects that allow Azure virtual machines to act as users in an Azure subscription. While this may sound like a bad idea, AWS utilizes IAM instance profiles for EC2 and Lambda execution roles to accomplish very similar results, so it’s not an uncommon practice across cloud providers. In my […]
February 13th, 2020
Attacking Azure with Custom Script Extensions
PowerShell and Bash scripts are excellent tools for automating simple or repetitive tasks. Azure values this and provides several mechanisms for remotely running scripts and commands in virtual machines (VMs). While there are many practical, safe uses of these Azure features, they can also be used maliciously. In this post we’ll explore how the Custom […]
December 10th, 2019
Azure Privilege Escalation via Cloud Shell
TLDR; By default, Azure Subscription Contributors have access to all storage accounts in a subscription. These storage accounts can contain Azure Cloud Shell storage files (Linux home directories) that can contain sensitive information. By modifying these Cloud Shell files, an attacker can execute commands in the Cloud Shell sessions of other users. This can lead […]