CVE-2025-36258: IBM InfoSphere Information Disclosure Flaw

CVE-2025-36258 Overview

IBM InfoSphere Information Server versions 11.7.0.0 through 11.7.1.6 contain a sensitive information disclosure vulnerability where user credentials and other sensitive data are stored in plain text. This insecure storage mechanism allows local users with access to the system to read and potentially exfiltrate sensitive authentication information, leading to credential theft and unauthorized access.

Critical Impact

Local users can access plaintext credentials stored by IBM InfoSphere Information Server, enabling credential theft, privilege escalation, and potential lateral movement within enterprise data integration environments.

Affected Products

• IBM InfoSphere Information Server 11.7.0.0 through 11.7.1.6
• IBM AIX (all supported versions running affected InfoSphere versions)
• Linux Kernel-based systems (all supported versions running affected InfoSphere versions)
• Microsoft Windows (all supported versions running affected InfoSphere versions)

Discovery Timeline

• 2026-03-25 - CVE-2025-36258 published to NVD
• 2026-03-26 - Last updated in NVD database

Technical Details for CVE-2025-36258

Vulnerability Analysis

This vulnerability falls under CWE-256 (Plaintext Storage of a Password), a critical security weakness that occurs when an application stores sensitive credentials without proper encryption or obfuscation. In the context of IBM InfoSphere Information Server, the product fails to implement adequate protection mechanisms for stored user credentials and other sensitive configuration data.

The vulnerability is exploitable through local access, meaning an attacker must have some level of authenticated access to the system hosting the InfoSphere Information Server installation. Once local access is obtained, the attacker can read stored credentials directly from the file system or configuration stores where they are maintained in cleartext format.

The confidentiality impact is significant as successful exploitation grants attackers access to authentication credentials that may be used across multiple systems in an enterprise environment. InfoSphere Information Server is commonly deployed in data integration scenarios where it connects to various enterprise databases and services, making the stored credentials particularly valuable for lateral movement attacks.

Root Cause

The root cause of this vulnerability is the improper implementation of credential storage within IBM InfoSphere Information Server. The application stores user credentials and sensitive configuration information in plaintext format rather than using industry-standard encryption mechanisms. This violates fundamental security principles around sensitive data protection and credential management.

Proper implementation would require encrypting stored credentials using strong cryptographic algorithms with secure key management, or leveraging platform-native secure storage mechanisms such as Windows Credential Manager, Linux keyring systems, or hardware security modules.

Attack Vector

The attack vector requires local access to the system where IBM InfoSphere Information Server is installed. An attacker with a valid local user account—even one with limited privileges—can navigate to the location where credentials are stored and read the plaintext values directly.

The attack scenario involves:

1. An attacker gains local access to a system running IBM InfoSphere Information Server through legitimate credentials, social engineering, or exploitation of another vulnerability
2. The attacker identifies configuration files or data stores containing plaintext credentials
3. The attacker reads the exposed credentials without requiring additional privileges
4. The harvested credentials can then be used for unauthorized access to connected systems, privilege escalation, or further lateral movement within the network

Since the vulnerability exposes credentials for data integration services, compromised credentials may provide access to enterprise databases, data warehouses, and other critical data infrastructure components.

Detection Methods for CVE-2025-36258

Indicators of Compromise

• Unusual file access patterns to InfoSphere Information Server configuration directories or credential storage locations
• Evidence of unauthorized users reading configuration files containing connection strings or authentication data
• Unexpected login attempts to databases or services that integrate with InfoSphere using credentials that may have been harvested
• File system audit logs showing access to sensitive configuration files by non-administrative accounts

Detection Strategies

• Enable and monitor file integrity monitoring (FIM) on InfoSphere Information Server installation directories and configuration files
• Configure audit policies to log all read access to directories containing sensitive configuration data
• Implement user behavior analytics to detect anomalous access patterns to credential storage locations
• Deploy endpoint detection and response (EDR) solutions to monitor for credential harvesting activities

Monitoring Recommendations

• Establish baseline access patterns for InfoSphere configuration files and alert on deviations
• Monitor for bulk file reads in configuration directories that may indicate credential harvesting
• Configure SIEM correlation rules to detect sequential access to multiple credential storage locations
• Review login activity for services connected to InfoSphere Information Server for signs of compromised credentials

How to Mitigate CVE-2025-36258

Immediate Actions Required

• Review the IBM Support Page for official patch information and apply the latest security update
• Audit current access permissions on InfoSphere Information Server installations and restrict local access to essential personnel only
• Implement additional access controls and monitoring on systems hosting InfoSphere Information Server
• Rotate credentials for all accounts that may have been stored by InfoSphere Information Server as a precautionary measure

Patch Information

IBM has released a security advisory addressing this vulnerability. Organizations running IBM InfoSphere Information Server versions 11.7.0.0 through 11.7.1.6 should consult the IBM Support Page for specific patch details and upgrade instructions. Applying the vendor-provided patch is the recommended remediation approach to ensure credentials are properly protected.

Workarounds

• Restrict local user access to InfoSphere Information Server host systems using operating system-level access controls
• Implement file system permissions to limit read access to configuration directories containing credential data
• Deploy application whitelisting to prevent unauthorized tools from being used to read credential files
• Enable comprehensive audit logging on the host system to detect and alert on potential credential access attempts
• Consider network segmentation to limit lateral movement potential if credentials are compromised

# Example: Restrict file permissions on Linux systems
chmod 600 /opt/IBM/InformationServer/Server/*/Configuration/*.properties
chown root:root /opt/IBM/InformationServer/Server/*/Configuration/*.properties

# Enable audit logging for configuration file access
auditctl -w /opt/IBM/InformationServer/Server/ -p r -k infosphere_config_access