CVE-2024-41799 – tgstation-server's DreamMaker environment files outside the deployment directory can be compiled and ran by insufficiently permissioned users

https://notcve.org/view.php?id=CVE-2024-41799

tgstation-server is a production scale tool for BYOND server management. Prior to 6.8.0, low permission users using the "Set .dme Path" privilege could potentially set malicious .dme files existing on the host machine to be compiled and executed. These .dme files could be uploaded via tgstation-server (requiring a separate, isolated privilege) or some other means. A server configured to execute in BYOND's trusted security level (requiring a third separate, isolated privilege OR being set by another user) could lead to this escalating into remote code execution via BYOND's shell() proc. The ability to execute this kind of attack is a known side effect of having privileged TGS users, but normally requires multiple privileges with known weaknesses. • https://github.com/tgstation/tgstation-server/commit/374852fe5ae306415eb5aafb2d16b06897d7afe4 https://github.com/tgstation/tgstation-server/pull/1835 https://github.com/tgstation/tgstation-server/security/advisories/GHSA-c3h4-9gc2-f7h4 • CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') •