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.
PoC代码[已公开]
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: 0.91485
epss-percentile: 0.99657
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
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
# digest: 490a00463044022002738630888b0cae991bd10a54c1afc783d9560cc706695ff2ec361696b802530220061e8a5aff5b42b1b6b3f32e156329e9c43c23e587799aa166def29539f6cd9b:922c64590222798bb761d5b6d8e72950