GHSA-X8GM-J36P-FPPF

Vulnerability from github – Published: 2024-10-01 22:27 – Updated: 2024-12-19 20:14
VLAI
Summary
LibreNMS vulnerable to Stored Cross-site Scripting via File Upload
Details

Summary

Stored Cross-Site Scripting (XSS) can archive via Uploading a new Background for a Custom Map.

Details

Users with "admin" role can set background for a custom map, this allow the upload of SVG file that can contain XSS payload which will trigger onload. This led to Stored Cross-Site Scripting (XSS).

PoC

  1. Login using an Admin role account.

  2. Go over to "$URL/maps/custom", the Manage Custom Maps. image

  3. Create a new map then choose to edit it.

  4. Choose the "Set Background" option. image

  5. Choose to upload a SVG file that have this content.

<svg xmlns="http://www.w3.org/2000/svg" onload="alert(document.domain)">
  <circle cx="50" cy="50" r="40" />
</svg>

  1. Once uploaded, there should be a link to the SVG return in the POST request to the API "$URL/maps/custom/1/background". image

  2. Go over to that link on browser, should see a pop-up. image

Impact

Attacker can use this to perform malicious java script code for malicious intent. This would impact other Admin role users and the Global Read role users. Normal users does not have permission to read the file, so they are not affected.

Severity
4.8 (Medium)
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
1.8 (Low)
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:P
Show details on source website
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{
  "affected": [
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "librenms/librenms"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "24.9.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2024-47528"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-116",
      "CWE-434",
      "CWE-79"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2024-10-01T22:27:32Z",
    "nvd_published_at": "2024-10-01T21:15:08Z",
    "severity": "LOW"
  },
  "details": "### Summary\nStored Cross-Site Scripting (XSS) can archive via Uploading a new Background for a Custom Map.\n\n### Details\nUsers with \"admin\" role can set background for a custom map, this allow the upload of SVG file that can contain XSS payload which will trigger onload. This led to Stored Cross-Site Scripting (XSS).\n\n### PoC\n1. Login using an Admin role account.\n\n2. Go over to \"$URL/maps/custom\", the Manage Custom Maps.\n![image](https://github.com/user-attachments/assets/9d621532-7880-4010-b12d-efd377f0cfdd)\n\n3. Create a new map then choose to edit it.\n4. Choose the \"Set Background\" option.\n![image](https://github.com/user-attachments/assets/dc2e9453-ef3e-4649-a42f-60b7a2ad8189)\n\n5. Choose to upload a SVG file that have this content.\n```svg\n\u003csvg xmlns=\"http://www.w3.org/2000/svg\" onload=\"alert(document.domain)\"\u003e\n  \u003ccircle cx=\"50\" cy=\"50\" r=\"40\" /\u003e\n\u003c/svg\u003e\n```\n\n6. Once uploaded, there should be a link to the SVG return in the POST request to the API \"$URL/maps/custom/1/background\".\n![image](https://github.com/user-attachments/assets/dc224960-0bd3-42c9-ad49-2ec85b065939)\n\n7. Go over to that link on browser, should see a pop-up.\n![image](https://github.com/user-attachments/assets/47a7db14-bd89-48fe-885a-fd80a052115e)\n\n### Impact\nAttacker can use this to perform malicious java script code for malicious intent.\nThis would impact other Admin role users and the Global Read role users. Normal users does not have permission to read the file, so they are not affected.\n",
  "id": "GHSA-x8gm-j36p-fppf",
  "modified": "2024-12-19T20:14:29Z",
  "published": "2024-10-01T22:27:32Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/librenms/librenms/security/advisories/GHSA-x8gm-j36p-fppf"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-47528"
    },
    {
      "type": "WEB",
      "url": "https://github.com/librenms/librenms/commit/d959bf1b366319eda16e3cd6dfda8a22beb203be"
    },
    {
      "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:L/I:L/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:P",
      "type": "CVSS_V4"
    }
  ],
  "summary": "LibreNMS vulnerable to Stored Cross-site Scripting via File Upload"
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • 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.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • 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.