CVE‑2021‑1079 – NVIDIA GeForce Experience Command Execution

NVIDIA GeForce Experience (GFE) v.<= 3.21 is affected by an Arbitrary File Write vulnerability in the GameStream/ShadowPlay plugins, where log files are created using NT AUTHORITY\SYSTEM level permissions, which lead to Command Execution and Elevation of Privileges (EoP). NVIDIA Security Bulletin – April 2021 NVIDIA Acknowledgements Page This blog post is a re-post of the original article “Chaining Bugs: CVE‑2021‑1079 - NVIDIA GeForce Experience (GFE) Command Execution” that I have written for Yarix on YLabs. Introduction Some time ago I was looking for...

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Rubyzip insecure ZIP handling & Metasploit RCE (CVE-2019-5624)

This is a re-posting of the original article "On insecure zip handling, Rubyzip and Metasploit RCE (CVE-2019-5624)" that I have wrote on Doyensec During one of our projects we had the opportunity to audit a Ruby-on-Rails (RoR) web application handling zip files using the Rubyzip gem. Zip files have always been an interesting entrypoint to triggering multiple vulnerability types, including path traversals and symlink file overwrite attacks. As the library under testing had symlink processing disabled, we focused on path traversal...

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