Details

Summary

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 https://nvd.nist.gov/vuln/detail/CVE-2023-34092 -- with surface area reduced to hosts having case-insensitive filesystems.

Patches

Fixed in [email protected], [email protected], [email protected], [email protected]

Details

Since picomatch defaults to case-sensitive glob matching, but the file server doesn't discriminate; a blacklist bypass is possible.

See picomatch usage, where nocase is defaulted to false: https://github.com/vitejs/vite/blob/v5.1.0-beta.1/packages/vite/src/node/server/index.ts#L632

By requesting raw filesystem paths using augmented casing, the matcher derived from config.server.fs.deny fails to block access to sensitive files.

PoC

Setup

1. Created vanilla Vite project using npm create vite@latest on a Standard Azure hosted Windows 10 instance.
   • npm run dev -- --host 0.0.0.0
   • Publicly accessible for the time being here: http://20.12.242.81:5173/
2. Created dummy secret files, e.g. custom.secret and production.pem
3. Populated vite.config.js with

export default { server: { fs: { deny: ['.env', '.env.*', '*.{crt,pem}', 'custom.secret'] } } }

Reproduction

1. curl -s http://20.12.242.81:5173/@​fs//
   • Descriptive error page reveals absolute filesystem path to project root
2. curl -s http://20.12.242.81:5173/@​fs/C:/Users/darbonzo/Desktop/vite-project/vite.config.js
   • Discoverable configuration file reveals locations of secrets
3. curl -s http://20.12.242.81:5173/@​fs/C:/Users/darbonzo/Desktop/vite-project/custom.sEcReT
   • Secrets are directly accessible using case-augmented version of filename

Proof

Impact

Who

• Users with exposed dev servers on environments with case-insensitive filesystems

What

• Files protected by server.fs.deny are both discoverable, and accessible

Severity

• CVSS Score: 7.5 / 10 (High)
• Vector String: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

References

• https://github.com/vitejs/vite/security/advisories/GHSA-c24v-8rfc-w8vw
• https://nvd.nist.gov/vuln/detail/CVE-2023-34092
• https://nvd.nist.gov/vuln/detail/CVE-2024-23331
• https://github.com/vitejs/vite/commit/0cd769c279724cf27934b1270fbdd45d68217691
• https://github.com/vitejs/vite/commit/91641c4da0a011d4c5352e88fc68389d4e1289a5
• https://github.com/vitejs/vite/commit/a26c87d20f9af306b5ce3ff1648be7fa5146c278
• https://github.com/vitejs/vite/commit/eeec23bbc9d476c54a3a6d36e78455867185a7cb
• https://github.com/vitejs/vite
• https://vitejs.dev/config/server-options.html#server-fs-deny

This data is provided by OSV and the GitHub Advisory Database (CC-BY 4.0).

Details

Summary

Vite dev server option server.fs.deny did not deny requests for patterns with directories. An example of such a pattern is /foo/**/*.

Impact

Only apps setting a custom server.fs.deny that includes a pattern with directories, and explicitly exposing the Vite dev server to the network (using --host or server.host config option) are affected.

Patches

Fixed in [email protected], [email protected], [email protected], [email protected], [email protected], [email protected]

Details

server.fs.deny uses picomatch with the config of { matchBase: true }. matchBase only matches the basename of the file, not the path due to a bug (https://github.com/micromatch/picomatch/issues/89). The vite config docs read like you should be able to set fs.deny to glob with picomatch. Vite also does not set { dot: true } and that causes dotfiles not to be denied unless they are explicitly defined.

Reproduction

Set fs.deny to ['**/.git/**'] and then curl for /.git/config.

• with matchBase: true, you can get any file under .git/ (config, HEAD, etc).
• with matchBase: false, you cannot get any file under .git/ (config, HEAD, etc).

Severity

• CVSS Score: 5.9 / 10 (Medium)
• Vector String: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

References

• https://github.com/vitejs/vite/security/advisories/GHSA-8jhw-289h-jh2g
• https://nvd.nist.gov/vuln/detail/CVE-2024-31207
• https://github.com/vitejs/vite/commit/011bbca350e447d1b499d242804ce62738c12bc0
• https://github.com/vitejs/vite/commit/5a056dd2fc80dbafed033062fe6aaf4717309f48
• https://github.com/vitejs/vite/commit/89c7c645f09d16a38f146ef4a1528f218e844d67
• https://github.com/vitejs/vite/commit/96a7f3a41ef2f9351c46f3ab12489bb4efa03cc9
• https://github.com/vitejs/vite/commit/ba5269cca81de3f5fbb0f49d58a1c55688043258
• https://github.com/vitejs/vite/commit/d2db33f7d4b96750b35370c70dd2c35ec3b9b649
• https://github.com/vitejs/vite

This data is provided by OSV and the GitHub Advisory Database (CC-BY 4.0).

v5.0.13

Compare Source

Please refer to CHANGELOG.md for details.

v5.0.12

Compare Source

Please refer to CHANGELOG.md for details.

v5.0.11

Compare Source

• fix: don't pretransform classic script links (#​15361) (19e3c9a), closes #​15361
• fix: inject __vite__mapDeps code before sourcemap file comment (#​15483) (d2aa096), closes #​15483
• fix(assets): avoid splitting , inside base64 value of srcset attribute (#​15422) (8de7bd2), closes #​15422
• fix(html): handle offset magic-string slice error (#​15435) (5ea9edb), closes #​15435
• chore(deps): update dependency strip-literal to v2 (#​15475) (49d21fe), closes #​15475
• chore(deps): update tj-actions/changed-files action to v41 (#​15476) (2a540ee), closes #​15476