Debug Endpoint pprof - Exposure Detection

highseverity

8.2CVSS score

75.1%likelihood of exploitation, next 30 days

100%of all CVEs are less likely

Readycheck to confirm it

The debugging endpoint /debug/pprof is exposed over the unauthenticated Kubelet healthz port. This debugging endpoint can potentially leak sensitive information such as internal Kubelet memory addresses and configuration, or for limited denial of service. Versions prior to 1.15.0, 1.14.4, 1.13.8, and 1.12.10 are affected. The issue is of medium severity, but not exposed by the default configuration.

Impact

An attacker can exploit this vulnerability to gather sensitive information, potentially leading to further attacks.

Fix

Disable or restrict access to the Debug Endpoint pprof to prevent unauthorized access.

How to confirm it

Send: GET {{BaseURL}}/debug/pprof/ ; GET {{BaseURL}}/debug/pprof/goroutine?debug=1
Positive when: contains "Types of profiles available:" or "Profile Descriptions" or "goroutine profile: total"

Run it with nuclei: nuclei -id CVE-2019-11248 -u <target>. This check is not marked as verified by its authors.

The full check

id: CVE-2019-11248

info:
  name: Debug Endpoint pprof - Exposure Detection
  author: 0xceeb,ritikchaddha
  severity: high
  description: |
    The debugging endpoint /debug/pprof is exposed over the unauthenticated Kubelet healthz port. This debugging endpoint can potentially leak sensitive information such as internal Kubelet memory addresses and configuration, or for limited denial of service. Versions prior to 1.15.0, 1.14.4, 1.13.8, and 1.12.10 are affected. The issue is of medium severity, but not exposed by the default configuration.
  impact: |
    An attacker can exploit this vulnerability to gather sensitive information, potentially leading to further attacks.
  remediation: |
    Disable or restrict access to the Debug Endpoint pprof to prevent unauthorized access.
  reference:
    - https://medium.com/bugbountywriteup/my-first-bug-bounty-21d3203ffdb0
    - http://mmcloughlin.com/posts/your-pprof-is-showing
    - https://github.com/kubernetes/kubernetes/issues/81023
    - https://groups.google.com/d/msg/kubernetes-security-announce/pKELclHIov8/BEDtRELACQAJ
    - https://nvd.nist.gov/vuln/detail/CVE-2019-11248
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:L
    cvss-score: 8.2
    cve-id: CVE-2019-11248
    cwe-id: CWE-862,CWE-419
    epss-score: 0.7506
    epss-percentile: 0.99513
    cpe: cpe:2.3:a:kubernetes:kubernetes:*:*:*:*:*:*:*:*
  metadata:
    max-request: 2
    vendor: kubernetes
    product: kubernetes
    shodan-query: http.title:"kubernetes web view"
    fofa-query:
      - title="kubernetes web view"
      - app="kubernetes-enterprise-manager"
    google-query: intitle:"kubernetes web view"
  tags: cve2019,cve,debug,kubernetes,kubelet,devops,unauth,disclosure,vkev,vuln

http:
  - method: GET
    path:
      - "{{BaseURL}}/debug/pprof/"
      - "{{BaseURL}}/debug/pprof/goroutine?debug=1"

    stop-at-first-match: true
    matchers:
      - type: word
        words:
          - "Types of profiles available:"
          - "Profile Descriptions"
          - "goroutine profile: total"
        condition: or

References

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