CVE-2024-21896

2024-02-2001:31:08

hackerone

github.com

node.js

path traversal

permission model

vulnerability

buffer

experimental feature

CVSS3

7.9

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

NONE

CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N/CR:M/IR:M/AR:M

AI Score

6.5

Confidence

Low

SSVC

Exploitation

none

Automatable

Technical Impact

total

JSON

The permission model protects itself against path traversal attacks by calling path.resolve() on any paths given by the user. If the path is to be treated as a Buffer, the implementation uses Buffer.from() to obtain a Buffer from the result of path.resolve(). By monkey-patching Buffer internals, namely, Buffer.prototype.utf8Write, the application can modify the result of path.resolve(), which leads to a path traversal vulnerability.
This vulnerability affects all users using the experimental permission model in Node.js 20 and Node.js 21.
Please note that at the time this CVE was issued, the permission model is an experimental feature of Node.js.

ADP Affected

[
  {
    "cpes": [
      "cpe:2.3:a:nodejs:nodejs:*:*:*:*:*:*:*:*"
    ],
    "vendor": "nodejs",
    "product": "nodejs",
    "versions": [
      {
        "status": "affected",
        "version": "21.6.1"
      },
      {
        "status": "unaffected",
        "version": "20.11.0"
      }
    ],
    "defaultStatus": "unknown"
  }
]