OSINT & Modern Recon Uncover Global VPN Infrastructure
Vladimir Tokarev
Recon Village @ DEF CON 33 · Day 1 · Recon Village
In this compelling presentation from Recon Village, Vladimir Tokarev, a Senior Security Researcher at Microsoft, unveils a series of critical vulnerabilities impacting the widely used OpenVPN infrastructure. The talk, titled "OSINT & Modern Recon Uncover Global VPN Infrastructure," details a fascinating journey from a casual dare to a sophisticated full attack chain, demonstrating how seemingly isolated bugs can ripple through global systems due to shared codebases and architectural patterns. Tokarev meticulously dissects the technical intricacies of these vulnerabilities, showcasing their potential for severe impact, ranging from local privilege escalation (LPE) to remote code execution (RCE) and even bypassing advanced kernel protections.
AI review
Tokarev delivers a complete, multi-stage exploit chain against OpenVPN's Windows stack — integer overflow in TapWindows6, stack overflow in the service IPC handler, named pipe impersonation for LPE, remote plugin injection for RCE, and PPL bypass via kernel primitives. The OSINT angle (Yara + VirusTotal to find 50+ affected drivers) is a genuinely clever methodology that elevates this beyond a single CVE drop. Solid technical depth with live demos that actually prove the chain works end-to-end.