CVE-2018-25272: ELBA5 RCE Vulnerability

CVE-2018-25272 Overview

CVE-2018-25272 is a critical remote code execution vulnerability in ELBA5 version 5.8.0, a banking software solution. The vulnerability allows attackers to obtain database credentials using default connector credentials, decrypt the DBA password due to weak encryption (CWE-326), and subsequently execute arbitrary commands with SYSTEM level permissions. Attackers can exploit this flaw by connecting to the database and either executing commands via the xp_cmdshell stored procedure or adding backdoor users to the BEDIENER table.

Critical Impact

This vulnerability enables unauthenticated remote attackers to achieve complete system compromise with SYSTEM-level privileges, potentially exposing sensitive banking data and allowing full infrastructure takeover.

Affected Products

• ELBA5 version 5.8.0

Discovery Timeline

• 2026-04-22 - CVE CVE-2018-25272 published to NVD
• 2026-04-22 - Last updated in NVD database

Technical Details for CVE-2018-25272

Vulnerability Analysis

This vulnerability stems from inadequate encryption of sensitive credentials (CWE-326 - Inadequate Encryption Strength) within ELBA5's database architecture. The attack chain exploits multiple security weaknesses: first, the software uses default connector credentials that allow initial database access; second, the DBA password is encrypted using a weak encryption scheme that can be trivially decrypted by an attacker.

Once database access is obtained, the attacker gains the ability to execute arbitrary operating system commands through SQL Server's xp_cmdshell extended stored procedure, which runs with SYSTEM privileges. This represents a complete compromise of the affected system, as SYSTEM is the highest privilege level on Windows operating systems.

The network-accessible nature of this vulnerability, combined with no authentication requirements and no user interaction needed, makes it particularly dangerous in enterprise environments where ELBA5 may be deployed.

Root Cause

The root cause of this vulnerability is the use of inadequate encryption strength (CWE-326) for protecting database credentials within ELBA5. The weak encryption implementation allows attackers who can access the encrypted credentials to easily decrypt them. Additionally, the presence of default connector credentials provides an initial foothold for attackers to access the database system.

Attack Vector

The attack vector is network-based and does not require any authentication or user interaction. An attacker can remotely connect to the ELBA5 database using default connector credentials, retrieve and decrypt the weakly-encrypted DBA password, and then leverage elevated database access to execute system commands. The xp_cmdshell stored procedure serves as the bridge from database access to operating system command execution with SYSTEM privileges. Alternatively, attackers can establish persistence by adding backdoor user accounts to the BEDIENER table.

For detailed technical information and proof-of-concept details, see the Exploit-DB entry #45905 and the VulnCheck Advisory on ELBA5.

Detection Methods for CVE-2018-25272

Indicators of Compromise

• Unexpected connections to SQL Server databases from unauthorized IP addresses
• Execution of xp_cmdshell stored procedure in database logs
• New or unauthorized entries in the BEDIENER table
• Unusual SYSTEM-level process execution originating from SQL Server processes

Detection Strategies

• Monitor SQL Server logs for authentication attempts using default connector credentials
• Implement database activity monitoring to detect xp_cmdshell execution attempts
• Review and audit the BEDIENER table for unauthorized user additions
• Deploy network intrusion detection rules to identify suspicious database connection patterns

Monitoring Recommendations

• Enable SQL Server audit logging with focus on stored procedure execution
• Implement real-time alerting for any xp_cmdshell usage
• Monitor for anomalous process creation from sqlservr.exe processes
• Track authentication events to the ELBA5 database for failed and successful logins from unknown sources

How to Mitigate CVE-2018-25272

Immediate Actions Required

• Restrict network access to the ELBA5 database server using firewall rules
• Disable the xp_cmdshell stored procedure if not required for legitimate operations
• Change all default connector credentials to strong, unique passwords
• Audit the BEDIENER table for unauthorized user accounts and remove any suspicious entries
• Implement network segmentation to isolate the ELBA5 deployment

Patch Information

Consult the vendor for available security updates. For the latest information on ELBA5, visit the ELBA Website. Review the VulnCheck Advisory for additional remediation guidance.

Workarounds

• Disable xp_cmdshell using SQL Server configuration: EXEC sp_configure 'xp_cmdshell', 0; RECONFIGURE;
• Implement strict network access controls limiting database connections to authorized hosts only
• Use database firewall solutions to block unauthorized query patterns
• Consider deploying ELBA5 in an isolated network segment with no direct internet exposure

# Disable xp_cmdshell in SQL Server
sqlcmd -S localhost -Q "EXEC sp_configure 'show advanced options', 1; RECONFIGURE; EXEC sp_configure 'xp_cmdshell', 0; RECONFIGURE;"