CVE-2025-48709

Executive Summary

CVE-2025-48709 exposes a critical credential disclosure vulnerability in BMC Control-M/Server version 9.0.21.300. The application writes database credentials (username, password, hostname, port) in cleartext to process lists and event logs during normal operation. An authenticated attacker with shell access can observe these credentials and use them to log in to the database server, potentially gaining access to sensitive data or performing lateral movement.

The vulnerability is triggered when DBUStatus.exe calls dbu_connection_details.vbs, which passes credentials as command-line arguments visible in process listings and logs. This is a classic case of CWE-312 (Cleartext Storage of Sensitive Information).

Affected Component: BMC Control-M/Server 9.0.21.300 on Windows.

Attack Vector: Local authenticated attacker with shell access.

Impact: Full database credential compromise, leading to unauthorized database access.

CVSS Breakdown & Threat Level

While no official CVSS vector is provided, a reasonable assessment based on the vulnerability characteristics is:

• Attack Vector (AV): Local (L) – requires shell access.
• Attack Complexity (AC): Low (L) – credentials are visible in standard process lists.
• Privileges Required (PR): Low (L) – attacker needs shell access but not necessarily admin.
• User Interaction (UI): None (N) – no user action required beyond normal operation.
• Scope (S): Changed (C) – compromised credentials allow access to a different database server.
• Confidentiality (C): High (H) – credentials are fully exposed.
• Integrity (I): High (H) – attacker can modify database data.
• Availability (A): None (N) – no direct DoS.

Estimated CVSS Score: 8.8 (High)

Threat Level: High. The vulnerability is trivial to exploit once shell access is obtained, and the impact on database security is severe.

Deep Dive & Mechanics

The vulnerability resides in the way BMC Control-M/Server handles database connection monitoring. The DBUStatus.exe process is executed periodically to check the status of the database connection. This process invokes dbu_connection_details.vbs with the database credentials passed as command-line arguments.

Mechanism:

1. DBUStatus.exe is scheduled or triggered to run.
2. It calls dbu_connection_details.vbs with the following parameters:
   • -u <username>
   • -p <password>
   • -h <hostname>
   • -P <port>
3. These parameters are visible in:
   • Process lists: Tools like Task Manager, wmic, or Get-Process show the full command line.
   • Event logs: Windows Event Log (e.g., Security or Application logs) may capture process creation events with command-line arguments.
4. An authenticated attacker with shell access can run wmic process where "name='DBUStatus.exe'" get commandline or similar commands to retrieve the credentials.

Root Cause: The application uses command-line arguments to pass sensitive data, which is inherently insecure on Windows because the command line is visible to other processes with appropriate privileges.

Vulnerable vs. Patched Code

Vulnerable Code (9.0.21.300):

The dbu_connection_details.vbs script is called with cleartext credentials as arguments.

' Vulnerable: dbu_connection_details.vbs
' Called by DBUStatus.exe with cleartext credentials
' Example: dbu_connection_details.vbs -u sa -p MyP@ssw0rd -h dbserver -P 1433

Patched Code (9.0.21.307):

The patched version likely uses a secure method to pass credentials, such as:

• Using a named pipe or shared memory to pass credentials.
• Storing credentials in a secure, encrypted configuration file and reading them internally.
• Using Windows Credential Manager or a secure token.

' Patched: dbu_connection_details.vbs
' Credentials are read from a secure configuration file or passed via a secure IPC mechanism
' No cleartext credentials on command line

Exploitation & Lab Setup

Red Team

Prerequisites:

• Access to a Windows host running BMC Control-M/Server 9.0.21.300.
• Shell access (e.g., via SSH, RDP, or a compromised service account).

Exploitation Steps:

1. Identify the vulnerable process:

   Get-Process -Name DBUStatus | Select-Object Id, ProcessName, CommandLine
   

2. Extract credentials from process command line:

   wmic process where "name='DBUStatus.exe'" get commandline /format:list
   

3. Alternatively, check event logs for process creation:

   Get-WinEvent -FilterHashtable @{LogName='Security'; ID=4688} | Where-Object {$_.Properties[5].Value -like '*DBUStatus*'} | Select-Object TimeCreated, Message
   

4. Use extracted credentials to connect to the database:

   # Using sqlcmd (if SQL Server)
   sqlcmd -S <hostname>,<port> -U <username> -P <password>
   

Blue Team

Detection Steps:

1. Monitor for suspicious process enumeration:

   • Alert on wmic process or Get-Process commands targeting DBUStatus.exe.
   • Alert on Get-WinEvent queries for event ID 4688 with DBUStatus in the command line.

2. Audit process creation events:

   • Enable advanced audit policy for "Audit Process Creation" and include command-line logging.
   • Review event ID 4688 for any process named DBUStatus.exe with command-line arguments containing -u, -p, -h, or -P.

3. Harden the environment:

   • Restrict shell access to only authorized administrators.
   • Use a jump box or privileged access workstation (PAW) for administrative tasks.
   • Implement application whitelisting to prevent unauthorized tools like wmic from being used by non-administrators.

Indicators of Compromise (IOCs)

• Process Name: DBUStatus.exe
• Script Name: dbu_connection_details.vbs
• Command-Line Pattern: DBUStatus.exe followed by arguments containing -u, -p, -h, -P with cleartext values.
• Event Log Entries: Windows Event ID 4688 (Process Creation) with DBUStatus.exe in the command line.
• Network Connections: Unexpected connections from the Control-M server to the database server using the extracted credentials.

Detection Engineering

YARA Rule

rule CVE_2025_48709_Credential_Disclosure {
    meta:
        description = "Detects cleartext database credentials in process command lines for BMC Control-M/Server"
        author = "Valters IT"
        date = "2025-04-10"
        reference = "CVE-2025-48709"
        severity = "high"
    strings:
        $cmdline = /DBUStatus\.exe.*-u\s+\S+\s+-p\s+\S+\s+-h\s+\S+\s+-P\s+\d+/ nocase
        $vbs_call = /dbu_connection_details\.vbs.*-u\s+\S+\s+-p\s+\S+/ nocase
    condition:
        any of them
}

Sigma Rule

title: CVE-2025-48709 - BMC Control-M Credential Disclosure
id: 8a4b3c2d-1e5f-4a7b-9c8d-0e1f2a3b4c5d
status: experimental
description: Detects process creation events where DBUStatus.exe is launched with cleartext database credentials.
references:
    - https://nvd.nist.gov/vuln/detail/CVE-2025-48709
author: Valters IT
date: 2025-04-10
tags:
    - attack.credential_access
    - attack.t1552
logsource:
    product: windows
    service: security
    definition: 'Requires advanced audit policy for process creation with command line logging enabled.'
detection:
    selection:
        EventID: 4688
        CommandLine|contains|all:
            - 'DBUStatus.exe'
            - '-u'
            - '-p'
            - '-h'
            - '-P'
    condition: selection
falsepositives:
    - Legitimate administrative activity (should be rare and monitored)
level: high

Suricata Rule

alert tcp $HOME_NET any -> $EXTERNAL_NET any (msg:"CVE-2025-48709 - BMC Control-M Credential Disclosure via Process Enumeration"; flow:to_server,established; content:"wmic"; nocase; content:"process"; nocase; content:"DBUStatus"; nocase; classtype:attempted-user; sid:1000001; rev:1;)

Remediation & Mitigation

Immediate Actions:

1. Upgrade: Apply the official patch by upgrading to BMC Control-M/Server version PACTV.9.0.21.307 or later.
2. Credential Rotation: Immediately rotate all database credentials that may have been exposed.
3. Audit Logs: Review process creation and event logs for any signs of credential harvesting.

Long-Term Mitigations:

1. Secure Credential Storage: Use Windows Credential Manager, a hardware security module (HSM), or a secrets management solution (e.g., HashiCorp Vault) to store database credentials.
2. Restrict Shell Access: Implement the principle of least privilege. Only authorized administrators should have shell access to the Control-M server.
3. Enable Command-Line Logging: Ensure Windows audit policy captures command-line arguments for all process creation events.
4. Network Segmentation: Place the Control-M server and database server on separate network segments with strict firewall rules.
5. Application Whitelisting: Use AppLocker or Windows Defender Application Control to block unauthorized tools like wmic from being executed by non-administrators.

Valters IT