CVE-2018-1459 in DB2
Summary
by MITRE
IBM DB2 for Linux, UNIX and Windows (includes DB2 Connect Server) 9.7, 10.1, 10.5, and 11.1 is vulnerable to stack based buffer overflow, caused by improper bounds checking which could lead an attacker to execute arbitrary code. IBM X-Force ID: 140210.
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Analysis
by VulDB Data Team • 03/17/2023
The vulnerability identified as CVE-2018-1459 affects IBM DB2 database management systems across multiple platforms including Linux, UNIX, and Windows operating systems. This critical security flaw exists in DB2 versions 9.7, 10.1, 10.5, and 11.1, making it a widespread concern for organizations utilizing these database versions. The vulnerability stems from inadequate bounds checking mechanisms within the software's memory management processes, creating an exploitable condition that could allow malicious actors to gain unauthorized access to system resources. The IBM X-Force ID 140210 further validates the severity and classification of this particular vulnerability within the cybersecurity community.
The technical implementation of this vulnerability manifests as a stack-based buffer overflow condition, which represents a classic and dangerous class of software flaws categorized under CWE-121. This type of buffer overflow occurs when a program writes data beyond the allocated bounds of a stack buffer, potentially overwriting adjacent memory locations including return addresses, function pointers, and other critical control data. The improper bounds checking mechanism fails to validate input data length against the allocated buffer size, allowing attackers to craft malicious inputs that exceed the buffer capacity and trigger the overflow condition. This flaw specifically impacts the DB2 Connect Server component, which serves as a gateway for remote database connections and is therefore a prime target for exploitation attempts.
The operational impact of this vulnerability extends beyond simple code execution capabilities, as it provides attackers with the potential to completely compromise database server systems and gain unauthorized access to sensitive data repositories. Successful exploitation of the buffer overflow could enable attackers to execute arbitrary code with the privileges of the DB2 service account, potentially leading to complete system compromise, data exfiltration, and disruption of business operations. The vulnerability's presence in DB2 Connect Server components means that remote attackers could exploit this weakness without requiring local system access, making it particularly dangerous for organizations with exposed database endpoints. This represents a significant risk under the ATT&CK framework's privilege escalation and execution tactics, as attackers could leverage this vulnerability to move laterally within network environments and establish persistent access to critical database infrastructure.
Organizations affected by this vulnerability should prioritize immediate remediation through official IBM security patches and updates, as the nature of stack-based buffer overflows typically requires immediate attention due to their exploitation potential. The mitigation strategy should include not only applying the vendor-provided patches but also implementing network segmentation controls to limit access to database servers, monitoring for suspicious network traffic patterns, and conducting thorough vulnerability assessments to identify any potential exploitation attempts. Additionally, organizations should review their database access controls and implement principle of least privilege configurations to minimize the potential impact should the vulnerability be successfully exploited. The remediation process should follow industry best practices for vulnerability management and security hardening, ensuring that all affected systems receive proper updates while maintaining business continuity and operational integrity throughout the patching process.