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Fixing dev server option server.fs.deny can be bypassed when hosted on case-insensitive filesystem - #765

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Fixing dev server option server.fs.deny can be bypassed when hosted on case-insensitive filesystem#765
rwnfoo wants to merge 1 commit into
EpicGames:mainfrom
rwnfoo:dev

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@rwnfoo

@rwnfoo rwnfoo commented Jul 17, 2025

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this project is a vulnerable Access Control Bypass via the server.fs.deny option. An attacker can gain access to sensitive files by requesting raw filesystem paths using case-augmented versions of filenames. This is only exploitable if the server is hosted on a case-insensitive filesystem, including those used by Windows.

Refferences

CVE-2024-23331
CWE-178
CWE-200
CWE-284

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