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Building a Vulnerable Box: RemoteMouse

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At the start of every year, I review my lab repository of intentionally vulnerable machines and do my best to add new ones to the list. I recently came across a particularly interesting flaw, from a teaching perspective, and thought it would be worth capturing. RemoteMouse is Windows/Linux/Mac compatible software that can be used in conjunction with a mobile app to turn your ... READ MORE

Building a Vulnerable Box – HTML5 VPN Portal

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Years ago, I wrote a series of posts covering the basics of building and exploiting vulnerable machines for learning purposes. With my two most recent posts covering virtual labs, it seems like an appropriate time to revisit the topic. I've used the misconfiguration I'm going to cover in this article on several Capture the Flag events and mock pentests over the years. It ... READ MORE

Building a Vulnerable Box – HFS Revisted

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A few months ago, in the Building a Vulnerable Box series, I wrote a walkthrough for putting together and compromising a Rejetto HFS server. The post had originally been intended for my security students at the time, but, to my surprise, it's become one of the War Room's most consistently visited write-ups. Just last week, a similar exploit was posted to the Exploit-DB by Naser ... READ MORE

Building a Vulnerable Box – Heartbleed

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Patchwork may have wrapped this series up in his last post, but I've got one more to add. The Heartbleed bug (CVE-2014-0160) received a lot of press when it was discovered and disclosed in April of 2014, and deservedly so.  The vulnerability was severe not only because of the sensitivity of the information it could leak, but also because of its prevalence across the ... READ MORE

Building a Vulnerable Box – VNC Auth Bypass

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This is going to be my last post in this series for the time being. Four vulnerable machines is a good start-up lab. The version of VNC we are going to use for this build is very out-of-date, but you'd be surprised (or maybe you wouldn't) on the frequency with which we encounter it on engagements. I haven't had a hit yet this year, but there were enough last year to warrant ... READ MORE

Building a Vulnerable Box – Domino

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IBM Domino  (formerly Lotus Domino) is a particular interesting (and lengthy) setup. The build is not terribly complicated, but the software has been vulnerable for a long time, so it's definitely worth exploring. We might as well have titled the blog "Building a Domino Box" with the vulnerability simply assumed. This box was also featured on the final for my university ... READ MORE

Building a Vulnerable Box – Elastix

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This spring, I had the opportunity to teach Network Security at a local university. As one would expect, I chose to teach the course from the perspective of a pentester. One of the challenges I've faced is setting up vulnerable systems for my students to attack. We've also started using the boxes internally to training new hires and test certain exploits and techniques (the ... READ MORE

Building a Lab Network in Proxmox and Sophos UTM9

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One of the best ways to acquire and maintain an offensive security skill set is to build a home lab and populate it with intentionally vulnerable machines. The most straightforward option is to simply spin up VMs in VirtualBox or VMWare Player and manage everything locally. To take things to the next level, however, you really need a hypervisor like ESXi or Proxmox. Nowadays, ... READ MORE

Microsoft Exchange – CVE-2021-26855+

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On March 2, 2021, Microsoft released several security updates to address at least seven critical vulnerabilities in supported versions of on-premise Microsoft Exchange Server. These vulnerabilities were observed being used in limited targeted attacks; however, due to the critical nature and publication of these vulnerabilities, Microsoft released guidance that all customers ... READ MORE