Vulnerability-Lookup

CVE-2024-47526 (GCVE-0-2024-47526)

Vulnerability from cvelistv5 – Published: 2024-10-01 20:25 – Updated: 2024-10-02 13:03

Title

LibreNMS has a Self-XSS ('Cross-site Scripting') in librenms/includes/html/modal/alert_template.inc.php

Summary

LibreNMS is an open-source, PHP/MySQL/SNMP-based network monitoring system. A Self Cross-Site Scripting (Self-XSS) vulnerability in the "Alert Templates" feature allows users to inject arbitrary JavaScript into the alert template's name. This script executes immediately upon submission but does not persist after a page refresh.

Severity ?

3.5 (Low)


                        
                          CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:L/A:N

CWE

CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Assigner

GitHub_M

References

URL

Tags

	https://github.com/librenms/librenms/security/adv…	x_refsource_CONFIRM
	https://github.com/librenms/librenms/commit/f259e…	x_refsource_MISC
	https://github.com/librenms/librenms/blob/0e741e3…	x_refsource_MISC
	https://github.com/librenms/librenms/blob/0e741e3…	x_refsource_MISC

Impacted products

	Vendor	Product	Version
	librenms	librenms	Affected: < 24.9.0

Show details on NVD website

JSON

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GHSA-GCGP-Q2JQ-FW52

Vulnerability from github – Published: 2024-10-01 20:31 – Updated: 2024-10-01 21:52

Summary

LibreNMS has Stored Cross-site Scripting vulnerability in "Alert Templates" feature

Details

Summary

A Self Cross-Site Scripting (Self-XSS) vulnerability in the "Alert Templates" feature allows users to inject arbitrary JavaScript into the alert template's name. This script executes immediately upon submission but does not persist after a page refresh.

Details

The vulnerability occurs when creating an alert template in the LibreNMS interface. Although the application sanitizes the "name" field when storing it in the database, this newly created template is immediately added to the table without any sanitization being applied to the name, allowing users to inject arbitrary JavaScript. This script executes when the template is created but does not persist in the database, thus preventing stored XSS.

For instance, the following payload can be used to exploit the vulnerability: test1<script>{onerror=alert}throw 1337</script>

The root cause of this vulnerability lies in the lack of sanitization of the "name" variable before it is rendered in the table. The vulnerability exists because the bootgrid function of the jQuery grid plugin does not sanitize the text being added to the table. Although tags are stripped before being added to the database (as shown in the code below), the vulnerability still allows Self-XSS during the creation of the template.

Where the variable is being sanitized before being stored in the database: https://github.com/librenms/librenms/blob/0e741e365aa974a74aee6b43d1b4b759158a5c7e/includes/html/forms/alert-templates.inc.php#L40

Where the vulnerability is happening: https://github.com/librenms/librenms/blob/0e741e365aa974a74aee6b43d1b4b759158a5c7e/includes/html/modal/alert_template.inc.php#L205

PoC

Navigate to the "Alert Templates" creation page in the LibreNMS interface.
In the "Name" field, input the following payload: test1<script>{onerror=alert}throw 1337</script>
Submit the form to create the alert template.
Observe that the JavaScript executes immediately, triggering an alert popup. However, this code does not persist after refreshing the page.

Impact

This is a Self Cross-Site Scripting (Self-XSS) vulnerability. Although the risk is lower compared to traditional XSS, it can still be exploited through social engineering or tricking users into entering or interacting with malicious code. This can lead to unauthorized actions or data exposure in the context of the affected user's session.

Severity ?

3.5 (Low)


                  
                    CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:L/A:N

1.9 (Low)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:P

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "librenms/librenms"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "24.9.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2024-47526"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2024-10-01T20:31:09Z",
    "nvd_published_at": "2024-10-01T21:15:07Z",
    "severity": "LOW"
  },
  "details": "### Summary\nA Self Cross-Site Scripting (Self-XSS) vulnerability in the \"Alert Templates\" feature allows users to inject arbitrary JavaScript into the alert template\u0027s name. This script executes immediately upon submission but does not persist after a page refresh.\n\n### Details\nThe vulnerability occurs when creating an alert template in the LibreNMS interface. Although the application sanitizes the \"name\" field when storing it in the database, this newly created template is immediately added to the table without any sanitization being applied to the name, allowing users to inject arbitrary JavaScript. This script executes when the template is created but does not persist in the database, thus preventing stored XSS.\n\nFor instance, the following payload can be used to exploit the vulnerability:\n```test1\u003cscript\u003e{onerror=alert}throw 1337\u003c/script\u003e```\n\nThe root cause of this vulnerability lies in the lack of sanitization of the \"name\" variable before it is rendered in the table. The vulnerability exists because the bootgrid function of the jQuery grid plugin does not sanitize the text being added to the table. Although tags are stripped before being added to the database (as shown in the code below), the vulnerability still allows Self-XSS during the creation of the template.\n\nWhere the variable is being sanitized before being stored in the database:\nhttps://github.com/librenms/librenms/blob/0e741e365aa974a74aee6b43d1b4b759158a5c7e/includes/html/forms/alert-templates.inc.php#L40\n\nWhere the vulnerability is happening:\nhttps://github.com/librenms/librenms/blob/0e741e365aa974a74aee6b43d1b4b759158a5c7e/includes/html/modal/alert_template.inc.php#L205 \n\n### PoC\n1. Navigate to the \"Alert Templates\" creation page in the LibreNMS interface.\n2. In the \"Name\" field, input the following payload:\n```test1\u003cscript\u003e{onerror=alert}throw 1337\u003c/script\u003e```\n3. Submit the form to create the alert template.\n4. Observe that the JavaScript executes immediately, triggering an alert popup. However, this code does not persist after refreshing the page.\n\n### Impact\nThis is a Self Cross-Site Scripting (Self-XSS) vulnerability. Although the risk is lower compared to traditional XSS, it can still be exploited through social engineering or tricking users into entering or interacting with malicious code. This can lead to unauthorized actions or data exposure in the context of the affected user\u0027s session.\n",
  "id": "GHSA-gcgp-q2jq-fw52",
  "modified": "2024-10-01T21:52:26Z",
  "published": "2024-10-01T20:31:09Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/librenms/librenms/security/advisories/GHSA-gcgp-q2jq-fw52"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-47526"
    },
    {
      "type": "WEB",
      "url": "https://github.com/librenms/librenms/commit/f259edc19b9f0ccca484c60b1ba70a0bfff97ef5"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/librenms/librenms"
    },
    {
      "type": "WEB",
      "url": "https://github.com/librenms/librenms/blob/0e741e365aa974a74aee6b43d1b4b759158a5c7e/includes/html/forms/alert-templates.inc.php#L40"
    },
    {
      "type": "WEB",
      "url": "https://github.com/librenms/librenms/blob/0e741e365aa974a74aee6b43d1b4b759158a5c7e/includes/html/modal/alert_template.inc.php#L205"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:L/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:P",
      "type": "CVSS_V4"
    }
  ],
  "summary": "LibreNMS has Stored Cross-site Scripting vulnerability in \"Alert Templates\" feature"
}

FKIE_CVE-2024-47526

Vulnerability from fkie_nvd - Published: 2024-10-01 21:15 - Updated: 2024-12-19 15:49

Severity ?

3.5 (Low) - CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:L/A:N
2.4 (Low) - CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:L/A:N

Summary

References

URL	Tags
security-advisories@github.com	https://github.com/librenms/librenms/blob/0e741e365aa974a74aee6b43d1b4b759158a5c7e/includes/html/forms/alert-templates.inc.php#L40	Product
security-advisories@github.com	https://github.com/librenms/librenms/blob/0e741e365aa974a74aee6b43d1b4b759158a5c7e/includes/html/modal/alert_template.inc.php#L205	Product
security-advisories@github.com	https://github.com/librenms/librenms/commit/f259edc19b9f0ccca484c60b1ba70a0bfff97ef5	Patch
security-advisories@github.com	https://github.com/librenms/librenms/security/advisories/GHSA-gcgp-q2jq-fw52	Exploit, Product

Impacted products

	Vendor	Product	Version
	librenms	librenms	*

JSON

To clipboard

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:librenms:librenms:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "E39B6DE8-DAD4-4158-B2BF-93B804AE09FF",
              "versionEndExcluding": "24.9.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "LibreNMS is an open-source, PHP/MySQL/SNMP-based network monitoring system. A Self Cross-Site Scripting (Self-XSS) vulnerability in the \"Alert Templates\" feature allows users to inject arbitrary JavaScript into the alert template\u0027s name. This script executes immediately upon submission but does not persist after a page refresh."
    },
    {
      "lang": "es",
      "value": "LibreNMS es un sistema de monitoreo de red de c\u00f3digo abierto basado en PHP/MySQL/SNMP. Una vulnerabilidad de tipo Self Cross-Site Scripting (Self-XSS) en la funci\u00f3n \"Alert Templates\" permite a los usuarios inyectar c\u00f3digo JavaScript arbitrario en el nombre de la plantilla de alerta. Este script se ejecuta inmediatamente despu\u00e9s de enviarlo, pero no persiste despu\u00e9s de actualizar la p\u00e1gina."
    }
  ],
  "id": "CVE-2024-47526",
  "lastModified": "2024-12-19T15:49:50.127",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 3.5,
          "baseSeverity": "LOW",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "HIGH",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 0.9,
        "impactScore": 2.5,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 2.4,
          "baseSeverity": "LOW",
          "confidentialityImpact": "NONE",
          "integrityImpact": "LOW",
          "privilegesRequired": "HIGH",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 0.9,
        "impactScore": 1.4,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2024-10-01T21:15:07.740",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Product"
      ],
      "url": "https://github.com/librenms/librenms/blob/0e741e365aa974a74aee6b43d1b4b759158a5c7e/includes/html/forms/alert-templates.inc.php#L40"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Product"
      ],
      "url": "https://github.com/librenms/librenms/blob/0e741e365aa974a74aee6b43d1b4b759158a5c7e/includes/html/modal/alert_template.inc.php#L205"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/librenms/librenms/commit/f259edc19b9f0ccca484c60b1ba70a0bfff97ef5"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Exploit",
        "Product"
      ],
      "url": "https://github.com/librenms/librenms/security/advisories/GHSA-gcgp-q2jq-fw52"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}

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.

Action not permitted

CVE-2024-47526 (GCVE-0-2024-47526)

GHSA-GCGP-Q2JQ-FW52

Summary

Details

PoC

Impact

FKIE_CVE-2024-47526

Tags

Sightings

Nomenclature