Oracle Access Manager - Remote Code Execution

id: CVE-2021-35587

info:
  name: Oracle Access Manager - Remote Code Execution
  author: cckuailong
  severity: critical
  description: |
    The Oracle Access Manager  portion of Oracle Fusion Middleware (component: OpenSSO Agent) is vulnerable to remote code execution. Supported versions that are affected are 11.1.2.3.0, 12.2.1.3.0 and 12.2.1.4.0. This is an easily exploitable vulnerability that allows unauthenticated attackers with network access via HTTP to compromise Oracle Access Manager.
  impact: |
    Successful exploitation of this vulnerability could allow an attacker to execute arbitrary code on the affected system.
  remediation: |
    Apply the latest security patches provided by Oracle to mitigate this vulnerability.
  reference:
    - https://testbnull.medium.com/oracle-access-manager-pre-auth-rce-cve-2021-35587-analysis-1302a4542316
    - https://nvd.nist.gov/vuln/detail/CVE-2021-35587
    - https://www.oracle.com/security-alerts/cpujan2022.html
    - https://github.com/ARPSyndicate/kenzer-templates
    - https://github.com/GrrrDog/Java-Deserialization-Cheat-Sheet
  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-2021-35587
    cwe-id: CWE-502
    epss-score: 0.96284
    epss-percentile: 0.99871
    cpe: cpe:2.3:a:oracle:access_manager:11.1.2.3.0:*:*:*:*:*:*:*
  metadata:
    verified: true
    max-request: 1
    vendor: oracle
    product: access_manager
    shodan-query:
      - http.title:"Oracle Access Management"
      - http.title:"oracle access management"
      - http.html:"/oam/pages/css/login_page.css"
    fofa-query:
      - body="/oam/pages/css/login_page.css"
      - title="oracle access management"
    google-query: intitle:"oracle access management"
  tags: cve2021,cve,oam,rce,java,unauth,oracle,kev,vkev,vuln

http:
  - method: GET
    path:
      - '{{BaseURL}}/oam/server/opensso/sessionservice'

    matchers-condition: and
    matchers:
      - type: word
        part: header
        words:
          - "x-oracle-dms-ecid"
          - "x-oracle-dms-rid"
        case-insensitive: true
        condition: or

      - type: word
        part: body
        words:
          - "/oam/pages/css/general.css"

      - type: status
        status:
          - 200
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