CVE-2004-1372 in DB2 Universal Database
Summary
by MITRE
Multiple stack-based buffer overflows in IBM DB2 7.x and 8.1 allow local users to execute arbitrary code via (1) a long third argument to the rec2xml function or (2) a long filename argument to the generate_distfile procedure.
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Analysis
by VulDB Data Team • 06/29/2019
The vulnerability identified as CVE-2004-1372 represents a critical stack-based buffer overflow flaw affecting IBM DB2 database versions 7.x and 8.1. This vulnerability resides within the database management system's handling of user-provided input parameters, specifically targeting two distinct functions that process external data. The flaw stems from insufficient bounds checking in the rec2xml function and the generate_distfile procedure, which fail to validate the length of input arguments before processing them. These functions operate within the database server environment, making them accessible to local users who can exploit the vulnerability to execute arbitrary code with the privileges of the database service account. The buffer overflow occurs when the system attempts to copy user-supplied data into fixed-length stack buffers without proper validation of input boundaries, creating opportunities for attackers to overwrite adjacent memory locations and potentially redirect program execution.
The technical exploitation of this vulnerability involves crafting malicious input parameters that exceed the allocated buffer space in memory. When the rec2xml function receives a third argument that exceeds the predetermined buffer size, or when the generate_distfile procedure processes a filename argument that surpasses acceptable length limits, the stack memory layout becomes corrupted. This corruption can overwrite return addresses, saved registers, and other critical program state information, allowing an attacker to inject and execute malicious code within the database server process context. The attack vector is particularly concerning because it requires only local system access, eliminating the need for network-based exploitation techniques. The vulnerability's impact is amplified by the elevated privileges typically associated with database service accounts, which often possess extensive system access rights and can potentially provide attackers with broader access to underlying systems and data resources.
The operational implications of CVE-2004-1372 extend beyond immediate code execution capabilities, as successful exploitation can lead to complete system compromise and data breaches. Database administrators face significant risk since local users with access to the database server can leverage this vulnerability to escalate privileges, access sensitive database content, or establish persistent backdoors within the system. The vulnerability affects database environments where the rec2xml function and generate_distfile procedure are utilized, which could include various enterprise applications, data processing pipelines, and automated database maintenance tasks. Organizations relying on IBM DB2 versions 7.x and 8.1 must consider the potential for unauthorized data access, data modification, and system integrity compromise when this vulnerability remains unpatched. The exploitation of such buffer overflows aligns with attack patterns documented in the attack tactics and techniques framework, particularly those involving privilege escalation and code injection within database environments. This vulnerability type corresponds to CWE-121 Stack-based Buffer Overflow, which is classified under the broader category of memory safety issues that have historically led to significant security incidents in database and application environments.
Mitigation strategies for CVE-2004-1372 should prioritize immediate patching of affected IBM DB2 versions, as IBM has released security updates addressing this specific vulnerability. Organizations should implement input validation controls at the application level to prevent overly long arguments from reaching the vulnerable functions, though this approach provides only partial protection since the core issue lies within the database engine itself. System administrators should consider implementing network segmentation and access controls to limit local system access to database servers, reducing the attack surface for local privilege escalation attempts. Additionally, monitoring and logging mechanisms should be enhanced to detect unusual parameter usage patterns that might indicate exploitation attempts. The vulnerability underscores the importance of maintaining up-to-date database software and implementing comprehensive security practices including regular vulnerability assessments, proper access controls, and robust database administration procedures. Organizations should also consider implementing database activity monitoring solutions that can detect anomalous behavior patterns associated with buffer overflow exploitation attempts and provide early warning capabilities for potential security incidents.