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Nuclei Templates

D-Link DIR-3040 1.13B03 - Information Disclosure

ID: CVE-2021-21816

Severity: medium

Author: gy741

Tags: cve2021,cve,dlink,exposure,router,syslog

Description

Section titled “Description”

D-Link DIR-3040 1.13B03 is susceptible to information disclosure in the Syslog functionality. A specially crafted HTTP network request can lead to the disclosure of sensitive information. An attacker can obtain access to user accounts and access sensitive information, modify data, and/or execute unauthorized operations.

YAML Source

Section titled “YAML Source”
id: CVE-2021-21816


info:
  name: D-Link DIR-3040 1.13B03 - Information Disclosure
  author: gy741
  severity: medium
  description: D-Link DIR-3040 1.13B03 is susceptible to information disclosure in the Syslog functionality. A specially crafted HTTP network request can lead to the disclosure of sensitive information. An attacker can obtain access to user accounts and access sensitive information, modify data, and/or execute unauthorized operations.
  impact: |
    An attacker can exploit this vulnerability to gain sensitive information from the router, potentially leading to further attacks.
  remediation: |
    Upgrade the router firmware to the latest version provided by D-Link.
  reference:
    - https://talosintelligence.com/vulnerability_reports/TALOS-2021-1281
    - https://nvd.nist.gov/vuln/detail/CVE-2021-21816
    - https://github.com/ARPSyndicate/cvemon
    - https://github.com/ARPSyndicate/kenzer-templates
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
    cvss-score: 4.3
    cve-id: CVE-2021-21816
    cwe-id: CWE-200
    epss-score: 0.00229
    epss-percentile: 0.60334
    cpe: cpe:2.3:o:dlink:dir-3040_firmware:1.13b03:*:*:*:*:*:*:*
  metadata:
    max-request: 1
    vendor: dlink
    product: dir-3040_firmware
  tags: cve2021,cve,dlink,exposure,router,syslog


http:
  - method: GET
    path:
      - "{{BaseURL}}/messages"


    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - "syslog:"
          - "admin"
          - "/etc_ro/lighttpd/www"
        condition: and


      - type: status
        status:
          - 200
# digest: 490a00463044022058240b356d7db1bfab75de695c3269fe48d8a4a919837c34cbd27575e0d13a3b022041470ce1d64941f9e5fc492bdb8512e8fb872ca373c0cdcb1e6823346cb584ba: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/2021/CVE-2021-21816.yaml"

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