#!/usr/bin/env python3 """ CVE-2026-20253 — Splunk Enterprise/Cloud PostgreSQL Sidecar Service Scanner Military-grade async reconnaissance scanner for unauthenticated file write vulnerability. Author: Advanced Persistent Security Research """ from __future__ import annotations import argparse import asyncio import base64 import ipaddress import json import re import socket import sys import time from collections.abc import Sequence from concurrent.futures import ThreadPoolExecutor from dataclasses import dataclass, field, asdict from datetime import datetime, timezone from enum import IntEnum, auto from pathlib import Path from typing import Any import aiohttp from colorama import Fore, Style, init init(autoreset=True) # --------------------------------------------------------------------------- # Constants & Configuration # --------------------------------------------------------------------------- DEFAULT_TIMEOUT = 12 CONCURRENCY = 60 WEB_PORT = 8000 WEB_SSL_PORT = 8000 # Splunk endpoints SPLUNK_ENDPOINTS = { "health": "/en-US/splunkd/__raw/services/server/info", "postgres_backup": "/en-US/splunkd/__raw/v1/postgres/recovery/backup", "postgres_restore": "/en-US/splunkd/__raw/v1/postgres/recovery/restore", "postgres_status": "/en-US/splunkd/__raw/v1/postgres/recovery/status/test", "postgres_health": "/en-US/splunkd/__raw/v1/postgres/health", "postgres_telemetry": "/en-US/splunkd/__raw/v1/postgres/telemetry", } # Test payloads for vulnerability detection TEST_PAYLOADS = [ {"database": "test", "backupFile": "test_backup"}, {"database": "search_metadata", "backupFile": "test_backup"}, ] class Color: OKGREEN = Fore.GREEN + Style.BRIGHT OKBLUE = Fore.BLUE + Style.BRIGHT OKCYAN = Fore.CYAN + Style.BRIGHT OKMAGENTA = Fore.MAGENTA + Style.BRIGHT WARNING = Fore.YELLOW + Style.BRIGHT FAIL = Fore.RED + Style.BRIGHT RESET = Style.RESET_ALL BOLD = Style.BRIGHT class VulnStatus(IntEnum): VULNERABLE = auto() LIKELY = auto() POSSIBLE = auto() NOT_VULNERABLE = auto() UNKNOWN = auto() @dataclass(frozen=True, slots=True) class ServiceProbe: port: int protocol: str status: str banner: str = "" response_time_ms: float = 0.0 vuln_indicators: dict[str, Any] = field(default_factory=dict) @dataclass(frozen=True, slots=True) class HostResult: target: str ip: str hostname: str = "" status: VulnStatus = VulnStatus.UNKNOWN confidence: int = 0 findings: list[str] = field(default_factory=list) services: list[ServiceProbe] = field(default_factory=list) version: str = "" splunk_version: str = "" cve_matches: dict[str, bool] = field(default_factory=dict) recommendations: list[str] = field(default_factory=list) def to_dict(self) -> dict[str, Any]: return { "target": self.target, "ip": self.ip, "hostname": self.hostname, "status": self.status.name, "confidence": self.confidence, "findings": self.findings, "services": [asdict(s) for s in self.services], "version": self.version, "splunk_version": self.splunk_version, "cve_matches": self.cve_matches, "recommendations": self.recommendations, } # --------------------------------------------------------------------------- # Async Probing Engine # --------------------------------------------------------------------------- class AsyncProber: def __init__(self, timeout: int = DEFAULT_TIMEOUT): self.timeout = aiohttp.ClientTimeout(total=timeout, connect=5) self._session: aiohttp.ClientSession | None = None async def __aenter__(self) -> "AsyncProber": conn = aiohttp.TCPConnector( limit=CONCURRENCY, limit_per_host=CONCURRENCY // 2, ssl=False, enable_cleanup_closed=True, ) self._session = aiohttp.ClientSession(connector=conn, timeout=self.timeout) return self async def __aexit__(self, *args: object) -> None: if self._session: await self._session.close() async def probe_http(self, ip: str, port: int, path: str = "/", ssl: bool = False, method: str = "GET", data: dict | None = None, headers: dict | None = None) -> ServiceProbe: start = time.perf_counter() scheme = "https" if ssl else "http" url = f"{scheme}://{ip}:{port}{path}" try: assert self._session is not None req_headers = { "User-Agent": "Mozilla/5.0 (Splunk Scanner)", "Authorization": "Basic Og==", # Empty credentials } if headers: req_headers.update(headers) if method == "POST": async with self._session.post(url, json=data, headers=req_headers, ssl=False, allow_redirects=True) as resp: body = await resp.text() elapsed = (time.perf_counter() - start) * 1000 return ServiceProbe(port=port, protocol="https" if ssl else "http", status=str(resp.status), banner=f"{resp.status} {len(body)} bytes", response_time_ms=elapsed) else: async with self._session.get(url, headers=req_headers, ssl=False, allow_redirects=True) as resp: body = await resp.text() elapsed = (time.perf_counter() - start) * 1000 return ServiceProbe(port=port, protocol="https" if ssl else "http", status=str(resp.status), banner=f"{resp.status} {len(body)} bytes", response_time_ms=elapsed) except Exception as exc: elapsed = (time.perf_counter() - start) * 1000 return ServiceProbe(port=port, protocol="https" if ssl else "http", status="error", banner=str(exc), response_time_ms=elapsed) # --------------------------------------------------------------------------- # Vulnerability Assessment # --------------------------------------------------------------------------- def extract_splunk_version(body: str, headers: dict) -> str: patterns = [ r"Splunk[/\s]([\d\.]+)", r"\"version\":\s*\"([\d\.]+)\"", r"splunk_version[\"':\s]+([\d\.]+)", r"X-Splunk-Version[\"':\s]+([\d\.]+)", ] for pat in patterns: m = re.search(pat, body, re.IGNORECASE) if m: return m.group(1) return "" def version_vulnerable(version: str) -> bool: """Check if Splunk version is vulnerable per advisory.""" try: parts = [int(x) for x in version.split(".")] # Vulnerable: 10.0.0 - 10.0.6, 10.2.0 - 10.2.3 if len(parts) >= 2: major, minor = parts[0], parts[1] if major == 10 and minor == 0: return parts[2] < 7 if len(parts) > 2 else True if major == 10 and minor == 2: return parts[2] < 4 if len(parts) > 2 else True return False except: return False def assess_splunk_vulns(result: HostResult) -> tuple[VulnStatus, int, dict[str, bool]]: score = 0 findings: list[str] = [] cve_matches = {"CVE-2026-20253": False} for svc in result.services: banner_lower = svc.banner.lower() # Splunk identification if "splunk" in banner_lower or "splunkd" in banner_lower: score += 10 findings.append(f"Splunk identified: {svc.banner[:100]}") # Version check if svc.version: v = svc.version result.splunk_version = v if version_vulnerable(v): score += 25 findings.append(f"Version {v} in vulnerable range (< 10.0.7 or < 10.2.4)") # PostgreSQL sidecar endpoint checks if "postgres" in str(svc.vuln_indicators).lower() or "postgres" in svc.banner.lower(): score += 15 findings.append("PostgreSQL sidecar endpoint detected") # Vulnerability confirmation if svc.vuln_indicators.get("backup_accessible"): score += 35 cve_matches["CVE-2026-20253"] = True findings.append("CVE-2026-20253: /v1/postgres/recovery/backup accessible without auth") if svc.vuln_indicators.get("restore_accessible"): score += 30 cve_matches["CVE-2026-20253"] = True findings.append("CVE-2026-20253: /v1/postgres/recovery/restore accessible without auth") if score >= 70: return VulnStatus.VULNERABLE, min(score, 100), cve_matches elif score >= 45: return VulnStatus.LIKELY, min(score, 100), cve_matches elif score >= 25: return VulnStatus.POSSIBLE, min(score, 100), cve_matches elif score > 0: return VulnStatus.NOT_VULNERABLE, score, cve_matches return VulnStatus.UNKNOWN, score, cve_matches # --------------------------------------------------------------------------- # Host Analysis Pipeline # --------------------------------------------------------------------------- async def analyze_host(prober: AsyncProber, ip: str) -> HostResult: services: list[ServiceProbe] = [] # Probe main health endpoint health = await prober.probe_http(ip, WEB_PORT, "/en-US/splunkd/__raw/services/server/info") services.append(health) # Extract version version = extract_splunk_version(health.banner, {}) # Probe PostgreSQL sidecar endpoints for name, path in SPLUNK_ENDPOINTS.items(): if "postgres" in name: vuln_indicators = {"endpoint": name} if "backup" in name or "restore" in name: # Test with empty credentials for payload in TEST_PAYLOADS: probe = await prober.probe_http(ip, WEB_PORT, path, method="POST", data=payload) probe.vuln_indicators = vuln_indicators if probe.status == "200" and "BackupPending" in probe.banner: vuln_indicators["backup_accessible"] = True probe.vuln_indicators["backup_accessible"] = True if probe.status == "200" and "RestorePending" in probe.banner: vuln_indicators["restore_accessible"] = True probe.vuln_indicators["restore_accessible"] = True probe.version = version services.append(probe) else: probe = await prober.probe_http(ip, WEB_PORT, path) probe.vuln_indicators = vuln_indicators probe.version = version services.append(probe) # Hostname resolution hostname = "" try: hostname = socket.gethostbyaddr(ip)[0] except Exception: pass result = HostResult(target=ip, ip=ip, hostname=hostname, services=services, version=version) status, confidence, cve_matches = assess_splunk_vulns(result) result.status = status result.confidence = confidence result.cve_matches = cve_matches result.findings = [f for svc in services if svc.status in ("200",) for f in [f"{svc.protocol}/{svc.port}: {svc.vuln_indicators.get('endpoint', 'unknown')}"]] # Recommendations if status in (VulnStatus.VULNERABLE, VulnStatus.LIKELY): result.recommendations.append("IMMEDIATE: Update Splunk Enterprise to >= 10.0.7 or >= 10.2.4") result.recommendations.append("Restrict Splunk management port (8000/8089) to internal network only") result.recommendations.append("Disable PostgreSQL sidecar service if not required") result.recommendations.append("Monitor for unauthorized file creation in /opt/splunk/") result.recommendations.append("Check for malicious PostgreSQL .pgpass modifications") return result # --------------------------------------------------------------------------- # CLI / Main # --------------------------------------------------------------------------- def print_banner() -> None: banner = f""" {Color.FAIL} ╔══════════════════════════════════════════════════════════════════════════════╗ ║ CVE-2026-20253 — Splunk PostgreSQL Sidecar Service Scanner ║ ║ Unauthenticated Arbitrary File Creation/Truncation → RCE ║ ║ Military-Grade Async Discovery & Exploitability Assessment ║ ╚══════════════════════════════════════════════════════════════════════════════╝ {Color.RESET}""" print(banner) def parse_args() -> argparse.Namespace: p = argparse.ArgumentParser( description="CVE-2026-20253 Splunk PostgreSQL Sidecar Scanner", formatter_class=argparse.RawDescriptionHelpFormatter, epilog=""" Examples: python scanner.py -n 10.0.0.0/24 python scanner.py -t 10.0.0.50 -o results.json python scanner.py -f targets.txt --threads 200 """, ) p.add_argument("-n", "--network", help="CIDR network range (e.g. 10.0.0.0/24)") p.add_argument("-t", "--target", help="Single target IP") p.add_argument("-f", "--file", help="File with target IPs (one per line)") p.add_argument("-o", "--output", help="JSON output file") p.add_argument("--timeout", type=int, default=DEFAULT_TIMEOUT, help=f"Timeout per probe (default {DEFAULT_TIMEOUT}s)") p.add_argument("--threads", type=int, default=CONCURRENCY, help=f"Concurrent probes (default {CONCURRENCY})") return p.parse_args() def load_targets(args: argparse.Namespace) -> list[str]: targets: list[str] = [] if args.target: targets.append(args.target) if args.file: with open(args.file, encoding="utf-8") as fh: for line in fh: line = line.strip() if line and not line.startswith("#"): targets.append(line) if args.network: try: net = ipaddress.ip_network(args.network, strict=False) targets.extend([str(h) for h in net.hosts()]) except ValueError as exc: print(f"{Color.FAIL}[!] Invalid CIDR: {exc}{Color.RESET}") sys.exit(1) return targets async def main_async() -> None: args = parse_args() print_banner() targets = load_targets(args) if not targets: print(f"{Color.WARNING}[!] No targets specified. Use -n, -t, or -f.{Color.RESET}") sys.exit(1) print(f"{Color.OKBLUE}[*] Loaded {len(targets)} target(s){Color.RESET}") print(f"{Color.OKBLUE}[*] Timeout: {args.timeout}s | Concurrency: {args.threads}{Color.RESET}") results: list[HostResult] = [] async with AsyncProber(timeout=args.timeout) as prober: semaphore = asyncio.Semaphore(args.threads) async def bounded_analyze(ip: str) -> HostResult: async with semaphore: return await analyze_host(prober, ip) tasks = [bounded_analyze(t) for t in targets] for coro in asyncio.as_completed(tasks): result = await coro results.append(result) status_color = { VulnStatus.VULNERABLE: Color.FAIL, VulnStatus.LIKELY: Color.WARNING, VulnStatus.POSSIBLE: Color.OKCYAN, VulnStatus.NOT_VULNERABLE: Color.OKGREEN, VulnStatus.UNKNOWN: Color.OKMAGENTA, }.get(result.status, Color.RESET) print(f"\n{Color.BOLD}Target: {result.ip}{Color.RESET} Hostname: {result.hostname or 'N/A'} Version: {result.splunk_version or 'N/A'}") print(f"Status: {status_color}{result.status.name}{Color.RESET} (confidence: {result.confidence}%)") for cve, match in result.cve_matches.items(): if match: print(f" {Color.FAIL}>>> {cve} CONFIRMED{Color.RESET}") for finding in result.findings[:5]: print(f" → {finding}") if args.output: Path(args.output).write_text(json.dumps([r.to_dict() for r in results], indent=2)) print(f"\n{Color.OKGREEN}[*] Results written to {args.output}{Color.RESET}") def main() -> None: try: asyncio.run(main_async()) except KeyboardInterrupt: print(f"\n{Color.WARNING}[!] Interrupted by user{Color.RESET}") sys.exit(130) if __name__ == "__main__": main()