CVE-2023-45178 in DB2
Summary
by MITRE • 12/03/2023
IBM Db2 for Linux, UNIX and Windows (includes DB2 Connect Server) 11.5 CLI is vulnerable to a denial of service when a specially crafted request is used. IBM X-Force ID: 268073.
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Analysis
by VulDB Data Team • 12/22/2023
IBM Db2 for Linux, UNIX and Windows version 11.5 Command Line Interface presents a denial of service vulnerability that can be exploited through specially crafted requests. This weakness specifically affects the CLI component of the database system and represents a critical security gap that could disrupt database operations and availability. The vulnerability stems from insufficient input validation mechanisms within the CLI processing logic, allowing maliciously formatted requests to trigger unexpected system behavior. When such requests are processed, they can cause the CLI to terminate unexpectedly or enter a state where it cannot properly handle subsequent legitimate requests. This vulnerability impacts all supported platforms including Linux, UNIX, and Windows environments where IBM Db2 is installed. The issue is particularly concerning as it affects the DB2 Connect Server functionality, which serves as a gateway for connecting to database systems from remote locations. The root cause of this vulnerability aligns with CWE-400, specifically related to resource management issues and inadequate error handling in command line interfaces. From an operational perspective, this vulnerability can lead to significant service disruption for database administrators and end users who rely on the CLI for database management tasks. Attackers could potentially exploit this weakness to repeatedly crash the CLI service, creating persistent availability issues that would require manual intervention to resolve. The vulnerability also falls under ATT&CK technique T1499.004 which involves network denial of service attacks targeting database systems. Organizations using IBM Db2 11.5 CLI should be particularly vigilant about monitoring for unusual CLI termination patterns or service disruptions that could indicate exploitation attempts. The attack surface is broad since the CLI is commonly used for database administration tasks, making it a potentially attractive target for adversaries seeking to disrupt database operations. This vulnerability directly impacts the availability aspect of the CIA triad, as it compromises the ability of authorized users to access database services through the command line interface. The issue is classified as a denial of service because it prevents legitimate users from performing their database management functions through the CLI component. IBM has recognized this vulnerability and assigned it the X-Force ID 268073 for tracking purposes, indicating the severity and potential impact on enterprise database environments. The exploitation of this vulnerability requires minimal technical skill and can be automated, making it particularly dangerous in environments where database administrators frequently use CLI tools for routine maintenance tasks.
The technical flaw manifests in the CLI's failure to properly validate incoming request parameters before processing them through the database connection framework. When a malformed or specially crafted request reaches the CLI component, the system lacks adequate defensive mechanisms to handle such inputs gracefully. This results in uncontrolled program termination or resource exhaustion within the CLI process. The vulnerability is particularly dangerous because it affects the core CLI functionality that database administrators rely upon for essential tasks such as database connection management, query execution, and system monitoring. The issue becomes more pronounced in environments where multiple users simultaneously access the database through CLI interfaces, as a single malicious request could potentially affect the entire CLI service. The affected IBM Db2 11.5 CLI implementation does not implement proper bounds checking or input sanitization for command line arguments, allowing attackers to inject unexpected data patterns that cause the system to crash. This behavior is consistent with CWE-129 which describes improper validation of input boundaries, and CWE-248 which relates to exposure of an exception to an unauthorized user. The vulnerability's impact extends beyond simple service interruption as it could potentially be leveraged to escalate privileges or access sensitive database information. From a defensive standpoint, organizations should implement monitoring solutions that can detect unusual CLI termination patterns or service restarts that might indicate exploitation attempts. Network segmentation and access controls should be strengthened to limit who can access the CLI interface, reducing the potential attack surface. The vulnerability also highlights the importance of regular patch management and vulnerability assessment procedures, as IBM has likely released a fix or workaround for this specific issue in their security updates. System administrators should consider implementing automated alerting mechanisms that trigger when CLI processes are terminated unexpectedly, providing early detection of potential exploitation attempts.
Organizations should prioritize immediate remediation efforts to address this denial of service vulnerability in their IBM Db2 environments. The most effective mitigation strategy involves applying the official IBM security patches that address the CLI input validation deficiencies. Until patches are applied, administrators should consider implementing additional protective measures such as restricting CLI access to trusted networks and implementing strict access controls for CLI usage. The vulnerability can be exploited remotely, making it essential for organizations to review their network security configurations and ensure that CLI interfaces are not exposed to untrusted networks. Network access control lists should be configured to limit CLI access to specific IP addresses or ranges, reducing the potential for unauthorized exploitation attempts. From a monitoring perspective, security teams should establish baseline behavior patterns for CLI usage and implement anomaly detection systems that can identify unusual termination events or service disruptions. The vulnerability also underscores the importance of conducting regular security assessments of database systems, particularly focusing on command line interfaces that are frequently targeted by attackers. Organizations should consider implementing database activity monitoring solutions that can track CLI usage patterns and alert administrators to potentially malicious activities. The impact of this vulnerability extends to business continuity and operational resilience, as database service interruptions can significantly impact enterprise operations. Regular vulnerability scanning and penetration testing should include assessment of CLI components to identify similar weaknesses that could be exploited by adversaries. The remediation process should also involve comprehensive testing of patches in staging environments to ensure that they do not introduce compatibility issues with existing database applications or workflows. Additionally, security awareness training for database administrators should emphasize the importance of recognizing and reporting unusual system behavior that might indicate exploitation attempts. The vulnerability serves as a reminder of the critical importance of maintaining up-to-date security patches and the potential consequences of delaying patch deployment in enterprise database environments.