In the ever-evolving realm of cyber security, the tools and techniques at our disposal are as varied as the threats we aim to counteract. Among these tools, note-taking applications play a pivotal role, not just in organizing our thoughts but in streamlining our entire workflow. Today, I'm excited to share how Obsidian, a tool I embraced over two and a half years ago while preparing for my eJPT exam, has become an indispensable ally in my journey through penetration testing, CVE hunting, and continuous learning. If you're not yet familiar with Obsidian, it's a robust note-taking application that operates on a local collection of plain text Markdown files. What sets it apart is its capability to interlink ideas, forming an expansive web of knowledge that is both intuitive and comprehensive to explore. Through considerable customization, I've developed what I consider to be an ideal method for consolidating notes, insights, and projects into a unified workspace. Here'
During an assessment, I identified a severe security vulnerability within Open eClass, an e-learning platform extensively utilized across educational institutions, notably within Greece, where it is deployed by virtually all Greek Universities and educational entities. Open eClass, developed by GUnet (Greek Universities Network), is instrumental in delivering asynchronous e-learning services. The vulnerability, cataloged under CVE-2024-26503, involves an unrestricted file upload flaw that enables remote code execution (RCE), impacting versions 3.15 and earlier of the platform. This critical security lapse presents a significant risk, potentially allowing unauthorized access and control over the system, thereby compromising the integrity and security of the educational infrastructure. Affected Versions: ● version <= 3.15 CVSSv3.1 Base Score: 9.1 ( Critical ) CVSSv3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H Exploitation Guide The vulnerability can be exploited