CVE-2024-23331
The Vite dev server option `server.fs.deny` can be bypassed on case-insensitive file systems using case-augmented versions of filenames.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.78%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
Vite is a frontend tooling framework for javascript. The Vite dev server option `server.fs.deny` can be bypassed on case-insensitive file systems using case-augmented versions of filenames. Notably this affects servers hosted on Windows. This bypass is similar to CVE-2023-34092 -- with surface area reduced to hosts having case-insensitive filesystems. Since `picomatch` defaults to case-sensitive glob matching, but the file server doesn't discriminate; a blacklist bypass is possible. By requesting raw filesystem paths using augmented casing, the matcher derived from `config.server.fs.deny` fails to block access to sensitive files. This issue has been addressed in vite@5.0.12, vite@4.5.2, vite@3.2.8, and vite@2.9.17. Users are advised to upgrade. Users unable to upgrade should restrict access to dev servers.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- EPSS
- 0.78% probability · 54th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-178, CWE-200, CWE-284
- Affected
- vitejs/vite
- Source
- security-advisories@github.com
References
- https://github.com/vitejs/vite/commit/91641c4da0a011d4c5352e88fc68389d4e1289a5Patch
- https://github.com/vitejs/vite/security/advisories/GHSA-c24v-8rfc-w8vwExploit, Vendor Advisory
- https://vitejs.dev/config/server-options.html#server-fs-denyProduct
- https://github.com/vitejs/vite/commit/91641c4da0a011d4c5352e88fc68389d4e1289a5Patch
- https://github.com/vitejs/vite/security/advisories/GHSA-c24v-8rfc-w8vwExploit, Vendor Advisory
- https://vitejs.dev/config/server-options.html#server-fs-denyProduct
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.