Fix #103: Resolve local privilege escalation in API IPC path#104
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NodeAndNails wants to merge 4 commits into
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Fix #103: Resolve local privilege escalation in API IPC path#104NodeAndNails wants to merge 4 commits into
NodeAndNails wants to merge 4 commits into
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Dropping the API IPC file in /tmp (world-writable) let any local user write "install|appId|library" to it, forcing Steam to install arbitrary apps. - Moved the IPC file to $XDG_RUNTIME_DIR with 0600 permissions. - Falls back to ~/.config/SLSsteam if XDG isn't set. - Added lstat() checks on the fallback dir to block symlink traversal and verified ownership to stop cross-UID attacks. - Checked mkdir() return value so we don't silently run in a broken state if it fails. - Added a stat()/geteuid() check in onFileChange() to reject commands if the file owner doesn't match (TOCTOU mitigation). - Added SLSAPI::deinit() to clean up the IPC file. - Wired deinit() into unload() in main.cpp. (Note: Steam's normal exit skips unload(), so XDG tmpfs cleanup on logout is the actual safety net). - Changed path to std::string in api.hpp so we can handle dynamic paths without buffer issues.
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This PR is getting stalled more than it should. |
Author
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Closing this in favor of #109. Sorry, I forgot to make a separate branch initially and pushed straight to main. The new PR has the exact same fix. |
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Dropping the API IPC file in /tmp (world-writable) let any local user write "install|appId|library" to it, forcing Steam to install arbitrary apps.