CVE-2025-27899: IBM DB2 Information Disclosure Vulnerability

CVE-2025-27899 Overview

IBM DB2 Recovery Expert for LUW 5.5 Interim Fix 002 contains an information disclosure vulnerability where sensitive data is exposed through environment variables. This type of vulnerability (CWE-526: Cleartext Storage of Sensitive Information in an Environment Variable) can provide attackers with valuable information that could aid in further attacks against the system.

Critical Impact

Sensitive information stored in environment variables could be accessed by unauthorized parties, potentially exposing credentials, configuration details, or other data that facilitates additional attacks against the IBM DB2 infrastructure.

Affected Products

• IBM DB2 Recovery Expert for LUW 5.5 Interim Fix 002

Discovery Timeline

• 2026-02-17 - CVE CVE-2025-27899 published to NVD
• 2026-02-18 - Last updated in NVD database

Technical Details for CVE-2025-27899

Vulnerability Analysis

This vulnerability falls under the category of Information Exposure, specifically related to the improper storage of sensitive information in environment variables. Environment variables are accessible to processes running in the same context and can often be enumerated by users with access to the system, making them an insecure location for storing sensitive data such as credentials, API keys, or internal configuration details.

The vulnerability allows network-based access without requiring user interaction or elevated privileges, meaning an attacker with basic network access to the affected system could potentially extract the sensitive information stored in these environment variables.

Root Cause

The root cause of CVE-2025-27899 is the cleartext storage of sensitive information in environment variables within IBM DB2 Recovery Expert for LUW 5.5 Interim Fix 002. This design flaw violates secure coding practices that dictate sensitive information should be stored in protected configuration files with appropriate access controls, encrypted at rest, or managed through secure credential management systems rather than exposed through environment variables.

Attack Vector

The attack vector for this vulnerability is network-based. An attacker with network access to a system running the vulnerable version of IBM DB2 Recovery Expert for LUW could potentially enumerate environment variables to extract the sensitive information. This could be accomplished through various means including:

• Exploiting other vulnerabilities that allow environment variable enumeration
• Gaining access to process information that exposes environment data
• Leveraging legitimate access to the system to view environment configurations

The exposed information could then be used to facilitate further attacks, such as credential reuse, privilege escalation, or gaining deeper access to the DB2 infrastructure.

Detection Methods for CVE-2025-27899

Indicators of Compromise

• Unusual queries or access attempts targeting environment variable information on systems running IBM DB2 Recovery Expert
• Unexpected process enumeration activities that may indicate attempts to extract environment data
• Anomalous network connections to DB2 Recovery Expert systems from unauthorized sources

Detection Strategies

• Monitor for unauthorized access attempts to systems running IBM DB2 Recovery Expert for LUW 5.5 Interim Fix 002
• Implement logging and alerting for any attempts to enumerate process environment variables
• Use endpoint detection tools to identify suspicious process information queries

Monitoring Recommendations

• Enable comprehensive audit logging on systems running the affected IBM DB2 Recovery Expert version
• Monitor network traffic for reconnaissance activities targeting the DB2 infrastructure
• Implement file integrity monitoring to detect any unauthorized changes to configuration files

How to Mitigate CVE-2025-27899

Immediate Actions Required

• Review your environment for installations of IBM DB2 Recovery Expert for LUW 5.5 Interim Fix 002
• Consult the IBM Security Advisory for the latest patch or updated interim fix
• Restrict network access to affected systems until patches can be applied
• Audit environment variables on affected systems to identify what sensitive information may have been exposed

Patch Information

IBM has published a security advisory addressing this vulnerability. Administrators should consult the IBM Support Page for the latest patch information and updated versions of IBM DB2 Recovery Expert for LUW that address this information disclosure issue.

Workarounds

• Limit network access to systems running IBM DB2 Recovery Expert to trusted networks and users only
• Review and remove any sensitive information stored in environment variables where possible
• Implement additional access controls and monitoring on affected systems as a temporary measure until patches are applied
• Consider migrating sensitive configuration data to secure credential management solutions