Path traversal in webpack-dev-middleware
### Summary _The **webpack-dev-middleware** middleware does not validate the supplied URL address sufficiently before returning the local file. It is possible to access any file on the developer's machine._ ### Details The middleware can either work with the physical filesystem when reading the files or it can use a virtualized in-memory _memfs_ filesystem. If _writeToDisk_ configuration option is set to **true**, the physical filesystem is used: [https://github.com/webpack/webpack-dev-middleware/blob/7ed24e0b9f53ad1562343f9f517f0f0ad2a70377/src/utils/setupOutputFileSystem.js#L21](https://github.com/webpack/webpack-dev-middleware/blob/7ed24e0b9f53ad1562343f9f517f0f0ad2a70377/src/utils/setupOutputFileSystem.js#L21) The _**getFilenameFromUrl**_ method is used to parse URL and build the local file path. The public path prefix is stripped from the URL, and the **unsecaped** path suffix is appended to the _outputPath_: [https://github.com/webpack/webpack-dev-middleware/blob/7ed24e0b9f53ad1562343f9f517f0f0ad2a70377/src/utils/getFilenameFromUrl.js#L82](https://github.com/webpack/webpack-dev-middleware/blob/7ed24e0b9f53ad1562343f9f517f0f0ad2a70377/src/utils/getFilenameFromUrl.js#L82) As the URL is not unescaped and normalized automatically before calling the midlleware, it is possible to use _%2e_ and _%2f_ sequences to perform path traversal attack. ### PoC _A blank project can be created containing the following configuration file **webpack.config.js**:_ `module.exports = { devServ
GHSA-wr3j-pwj9-hqq6
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: osv:GHSA-wr3j-pwj9-hqq6
webpack-dev-middleware
Source reference: /affected/0/package/name
- Affected versions
- Not stated in this record
- Fixed versions
- 7.1.0
Source reference:
/affected/0/ranges - Prerequisites
- Not stated in this record
webpack-dev-middleware
Source reference: /affected/1/package/name
- Affected versions
- Not stated in this record
- Fixed versions
- 6.1.2
Source reference:
/affected/1/ranges - Prerequisites
- Not stated in this record
webpack-dev-middleware
Source reference: /affected/2/package/name
- Affected versions
- Not stated in this record
- Fixed versions
- 5.3.4
Source reference:
/affected/2/ranges - Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"ranges": [
{
"type": "SEMVER",
"events": [
{
"introduced": "7.0.0"
},
{
"fixed": "7.1.0"
}
]
}
],
"package": {
"name": "webpack-dev-middleware",
"purl": "pkg:npm/webpack-dev-middleware",
"ecosystem": "npm"
},
"database_specific": {
"source": "https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2024/03/GHSA-wr3j-pwj9-hqq6/GHSA-wr3j-pwj9-hqq6.json"
}
},
{
"ranges": [
{
"type": "SEMVER",
"events": [
{
"introduced": "6.0.0"
},
{
"fixed": "6.1.2"
}
]
}
],
"package": {
"name": "webpack-dev-middleware",
"purl": "pkg:npm/webpack-dev-middleware",
"ecosystem": "npm"
},
"database_specific": {
"source": "https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2024/03/GHSA-wr3j-pwj9-hqq6/GHSA-wr3j-pwj9-hqq6.json"
}
},
{
"ranges": [
{
"type": "SEMVER",
"events": [
{
"introduced": "0"
},
{
"fixed": "5.3.4"
}
]
}
],
"package": {
"name": "webpack-dev-middleware",
"purl": "pkg:npm/webpack-dev-middleware",
"ecosystem": "npm"
},
"database_specific": {
"source": "https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2024/03/GHSA-wr3j-pwj9-hqq6/GHSA-wr3j-pwj9-hqq6.json",
"last_known_affected_version_range": "<= 5.3.3"
}
}
]- Related CVEs
- CVE-2024-29180
Source reference:
/aliases
Publisher severity
high
Source reference: /database_specific/severity
- Event
- #72820 · Revision 1
- Added to Heist Feed
- Publisher date