CVE-2018-1488 in DB2
Summary
by MITRE
IBM DB2 for Linux, UNIX and Windows (includes DB2 Connect Server) 10.5 and 11.1 is vulnerable to a buffer overflow, which could allow an authenticated local attacker to execute arbitrary code on the system as root. IBM X-Force ID: 140973.
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Analysis
by VulDB Data Team • 03/17/2023
This vulnerability represents a critical buffer overflow flaw in IBM DB2 database management system across multiple operating systems including Linux, UNIX, and Windows platforms. The issue affects specific versions 10.5 and 11.1 of the database server and connect server components, making it particularly concerning given DB2's widespread deployment in enterprise environments. The vulnerability stems from improper input validation mechanisms within the database server's processing routines that fail to adequately check buffer boundaries during data handling operations.
The technical exploitation of this buffer overflow occurs when an authenticated local user with access to the database system can craft malicious input that exceeds the allocated buffer space, causing memory corruption that can be leveraged to execute arbitrary code with elevated privileges. This privilege escalation vector is particularly dangerous because it allows attackers to gain root-level access to the underlying operating system, effectively compromising the entire database server infrastructure. The vulnerability operates at the kernel or system level where memory management routines are processed, making it difficult to detect and mitigate through standard application-level security controls.
From an operational impact perspective, this vulnerability presents a severe risk to enterprise database security as it enables attackers who already have legitimate database access to escalate their privileges and potentially gain full system control. The authenticated nature of the exploit means that attackers must first establish legitimate credentials, but this barrier is often overcome through various attack vectors including credential theft, social engineering, or exploitation of other vulnerabilities. Once successfully exploited, the attacker gains complete control over the database server and can potentially access or manipulate all database contents, modify system configurations, or establish persistent backdoors.
Organizations should implement immediate mitigations including applying the vendor-provided security patches and updates for IBM DB2 versions 10.5 and 11.1, as well as implementing strict access controls and monitoring for suspicious authentication patterns. Network segmentation and least privilege access models should be enforced to limit potential damage from successful exploitation attempts. The vulnerability aligns with CWE-121, which describes buffer overflow conditions in stack-based memory allocation, and represents a significant concern from ATT&CK framework perspective under privilege escalation techniques where attackers seek to gain elevated system privileges. Regular security assessments and vulnerability scanning should be conducted to identify and remediate similar issues across the database infrastructure.
The broader implications of this vulnerability extend beyond immediate exploitation scenarios as it highlights the importance of proper input validation and memory management practices in enterprise database systems. Organizations should conduct comprehensive security reviews of their database configurations, implement robust monitoring solutions for anomalous system behavior, and maintain up-to-date incident response procedures to address potential exploitation attempts. Additionally, regular security training for database administrators and system operators is crucial to prevent unauthorized access and reduce the attack surface for such privilege escalation vulnerabilities.