GHSA-v7w9-63xh-6r3w
Vulnerability from github
Published
2024-11-15 15:34
Modified
2024-11-15 20:49
Severity ?
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:L/A:L
Summary
LibreNMS has a Reflected XSS ('Cross-site Scripting') in librenms/includes/functions.php
Details

Summary

A Reflected Cross-Site Scripting (XSS) vulnerability in the "section" parameter of the "logs" tab of a device allows attackers to inject arbitrary JavaScript. This vulnerability results in the execution of malicious code when a user accesses the page with a malicious "section" parameter, potentially compromising their session and enabling unauthorized actions. The issue arises from a lack of sanitization in the "report_this()" function.

Details

The "section" parameter of the "logs" tab is vulnerable to reflected XSS. An attacker can inject the following XSS payload into the "section" parameter: <script>constructor['constructor'](atob('Y29uZmlybShkb2N1bWVudC5kb21haW4p'))();<%2fscript>

When the page is loaded with this malicious parameter, the script executes immediately. This vulnerability occurs due to the lack of sanitization in the "report_this()" function. Other endpoints using this same function may also be vulnerable.

The vulnerable sink is located here: https://github.com/librenms/librenms/blob/7f2ae971c4a565b0d7345fa78b4211409f96800a/includes/functions.php#L523 https://github.com/librenms/librenms/blob/7f2ae971c4a565b0d7345fa78b4211409f96800a/includes/html/pages/device/logs.inc.php#L93

PoC

  1. Inject the following payload into the "section" parameter of the "logs" tab: <script>constructor['constructor'](atob('Y29uZmlybShkb2N1bWVudC5kb21haW4p'))();<%2fscript>
  2. Access the page with the injected payload.
  3. Observe that the injected script executes when the page is loaded.

Example URL: http://<your_url>/device/device=1/tab=logs/section=%3Cscript%3Econstructor['constructor'](atob('Y29uZmlybShkb2N1bWVudC5kb21haW4p'))();%3C%2fscript%3E/

Example Request: http GET /device/device=1/tab=logs/section=%3Cscript%3Econstructor['constructor'](atob('Y29uZmlybShkb2N1bWVudC5kb21haW4p'))();%3C%2fscript%3E/ HTTP/1.1 Host: <your_host> Cookie: <your_cookie>

Impact

This vulnerability allows attackers to execute arbitrary JavaScript in the context of a user’s session by crafting a malicious URL. The attack could lead to session hijacking, unauthorized actions, or further exploitation by injecting malicious scripts.

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-2024-50351"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2024-11-15T15:34:36Z",
    "nvd_published_at": "2024-11-15T16:15:35Z",
    "severity": "HIGH"
  },
  "details": "### Summary\nA Reflected Cross-Site Scripting (XSS) vulnerability in the \"section\" parameter of the \"logs\" tab of a device allows attackers to inject arbitrary JavaScript. This vulnerability results in the execution of malicious code when a user accesses the page with a malicious \"section\" parameter, potentially compromising their session and enabling unauthorized actions. The issue arises from a lack of sanitization in the \"report_this()\" function.\n\n### Details\nThe \"section\" parameter of the \"logs\" tab is vulnerable to reflected XSS. An attacker can inject the following XSS payload into the \"section\" parameter:\n```\u003cscript\u003econstructor[\u0027constructor\u0027](atob(\u0027Y29uZmlybShkb2N1bWVudC5kb21haW4p\u0027))();\u003c%2fscript\u003e```\n\nWhen the page is loaded with this malicious parameter, the script executes immediately. This vulnerability occurs due to the lack of sanitization in the \"report_this()\" function. Other endpoints using this same function may also be vulnerable.\n\nThe vulnerable sink is located here:\nhttps://github.com/librenms/librenms/blob/7f2ae971c4a565b0d7345fa78b4211409f96800a/includes/functions.php#L523\nhttps://github.com/librenms/librenms/blob/7f2ae971c4a565b0d7345fa78b4211409f96800a/includes/html/pages/device/logs.inc.php#L93\n\n### PoC\n1. Inject the following payload into the \"section\" parameter of the \"logs\" tab:\n```\u003cscript\u003econstructor[\u0027constructor\u0027](atob(\u0027Y29uZmlybShkb2N1bWVudC5kb21haW4p\u0027))();\u003c%2fscript\u003e```\n2. Access the page with the injected payload.\n3. Observe that the injected script executes when the page is loaded.\n\nExample URL: ```http://\u003cyour_url\u003e/device/device=1/tab=logs/section=%3Cscript%3Econstructor[\u0027constructor\u0027](atob(\u0027Y29uZmlybShkb2N1bWVudC5kb21haW4p\u0027))();%3C%2fscript%3E/```\n\nExample Request:\n```http\nGET /device/device=1/tab=logs/section=%3Cscript%3Econstructor[\u0027constructor\u0027](atob(\u0027Y29uZmlybShkb2N1bWVudC5kb21haW4p\u0027))();%3C%2fscript%3E/ HTTP/1.1\nHost: \u003cyour_host\u003e\nCookie: \u003cyour_cookie\u003e\n```\n\n### Impact\n\nThis vulnerability allows attackers to execute arbitrary JavaScript in the context of a user\u2019s session by crafting a malicious URL. The attack could lead to session hijacking, unauthorized actions, or further exploitation by injecting malicious scripts.\n",
  "id": "GHSA-v7w9-63xh-6r3w",
  "modified": "2024-11-15T20:49:52Z",
  "published": "2024-11-15T15:34:36Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/librenms/librenms/security/advisories/GHSA-v7w9-63xh-6r3w"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-50351"
    },
    {
      "type": "WEB",
      "url": "https://github.com/librenms/librenms/commit/6a14a9bd767c6e452e4df77a24126c3eeb93dcbf"
    },
    {
      "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 Reflected XSS (\u0027Cross-site Scripting\u0027) in librenms/includes/functions.php"
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




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.
  • 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.