CVE-2009-4331 in DB2
Summary
by MITRE
The Install component in IBM DB2 9.5 before FP5 and 9.7 before FP1 configures the High Availability (HA) scripts with incorrect file-permission and authorization settings, which has unknown impact and local attack vectors.
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Analysis
by VulDB Data Team • 03/20/2025
The vulnerability identified as CVE-2009-4331 affects IBM DB2 database management systems version 9.5 prior to fix pack 5 and version 9.7 prior to fix pack 1, specifically within the Install component's High Availability script configuration. This issue represents a significant security weakness in database deployment processes that could potentially enable unauthorized access to critical system resources. The flaw manifests in how the installation process handles file permissions and authorization settings for high availability scripts, creating potential security exposure points that adversaries could exploit. The vulnerability falls under the category of improper privilege management and configuration errors that compromise system integrity and data protection mechanisms.
The technical flaw stems from the installation process failing to properly establish secure file permissions and authorization settings for High Availability scripts during the DB2 database deployment. This misconfiguration creates a scenario where local attackers could potentially gain elevated privileges or access sensitive system components that should remain restricted. The improper file permission settings may allow unauthorized users to modify or execute HA scripts with elevated privileges, potentially leading to system compromise or data manipulation. This vulnerability is particularly concerning because it affects the database installation process itself, meaning the weakness exists from the initial deployment phase and could persist throughout the system's operational lifecycle. The issue demonstrates poor adherence to security best practices in software installation and configuration management, creating a persistent security risk that could be exploited by both internal and external threat actors.
The operational impact of CVE-2009-4331 extends beyond simple permission misconfigurations to potentially enable complete system compromise through local attack vectors. Attackers exploiting this vulnerability could leverage the improperly configured HA scripts to escalate privileges, modify database configurations, or potentially gain access to sensitive data stored within the DB2 environment. The local attack vectors associated with this vulnerability mean that any user with access to the system could potentially exploit the misconfigured permissions, making the impact particularly severe in multi-user environments. The unknown impact designation reflects the potential for various exploitation scenarios that could range from privilege escalation to complete system takeover, depending on the specific system configuration and user access levels. Organizations running affected DB2 versions face significant risk of data breaches, system integrity compromises, and potential regulatory violations due to this installation-time vulnerability.
Mitigation strategies for CVE-2009-4331 primarily focus on applying the appropriate IBM fix packs that address the High Availability script permission configurations. System administrators should immediately upgrade to IBM DB2 9.5 Fix Pack 5 or 9.7 Fix Pack 1 to resolve the vulnerability. Additionally, organizations should conduct comprehensive security audits of existing DB2 installations to identify any remaining improperly configured HA scripts that may have been deployed prior to the fix pack implementation. The remediation process should include verifying that all High Availability scripts have appropriate file permissions and authorization settings, typically requiring restrictive permissions such as 700 or 600 for executable scripts and configuration files. This vulnerability aligns with CWE-732 and CWE-276 categories related to incorrect permissions and improper file permissions, and represents a clear violation of the principle of least privilege. Organizations should also implement regular security monitoring to detect any unauthorized modifications to database installation components and establish proper change management procedures for database deployment processes. The ATT&CK framework categorizes this vulnerability under privilege escalation and defense evasion techniques, as it enables attackers to gain elevated system privileges through installation-time misconfigurations.