CVE-2008-3960 in DB2 Universal Database
Summary
by MITRE
Unspecified vulnerability in the JDBC Applet Server Service (aka db2jds) in IBM DB2 UDB 8 before Fixpak 17 allows remote attackers to cause a denial of service (service crash) via "malicious packets."
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Analysis
by VulDB Data Team • 08/16/2019
The vulnerability identified as CVE-2008-3960 represents a critical weakness within IBM DB2 Universal Database version 8 prior to Fixpak 17, specifically affecting the JDBC Applet Server Service also known as db2jds. This service operates as a component that facilitates Java-based database connectivity and application execution within the DB2 environment. The unspecified nature of the vulnerability indicates that the exact technical flaw remains undisclosed in the public record, though its impact on system stability is well-documented through the reported denial of service condition. The vulnerability resides within the network service layer that processes incoming connections and requests from remote clients seeking database access through JDBC protocols.
The technical exploitation of this vulnerability occurs through the transmission of malicious packets to the affected DB2 service, which triggers an unexpected system behavior leading to service termination or complete system crash. This type of vulnerability falls under the category of input validation failures and can be classified as a CWE-121, which encompasses buffer overflow conditions or similar memory corruption issues that may occur when processing malformed network data. The JDBC Applet Server Service operates by accepting incoming network connections and processing requests from Java-based applications, making it a prime target for network-based attacks that manipulate the service's packet handling mechanisms. The vulnerability demonstrates the classic characteristics of a remote code execution vector that can be leveraged without authentication, allowing attackers to disrupt database operations and availability.
The operational impact of this vulnerability extends beyond simple service disruption, as it can severely compromise the availability of database services critical to enterprise applications. Organizations relying on DB2 UDB 8 for business-critical operations face potential financial losses due to extended downtime, data access restrictions, and potential service degradation that can affect multiple dependent systems. The vulnerability affects database administrators and security teams who must monitor and maintain the database service, as the denial of service condition can occur without any visible indication of malicious activity, making detection and response challenging. From an attack perspective, this vulnerability aligns with ATT&CK technique T1499, which encompasses network denial of service attacks that target system availability and can be executed remotely without requiring privileged access to the target system. The impact is particularly severe in environments where database availability is mission-critical for business operations.
Mitigation strategies for CVE-2008-3960 primarily focus on applying the official IBM Fixpak 17 patch that addresses the underlying vulnerability in the JDBC Applet Server Service. Organizations should immediately implement this patch across all affected DB2 UDB 8 installations, ensuring that proper testing is conducted in staging environments before production deployment. Network-level protections should include firewall rules that restrict access to the JDBC Applet Server Service ports, limiting exposure to trusted networks only and implementing intrusion detection systems to monitor for suspicious packet patterns. System administrators should also consider disabling the JDBC Applet Server Service entirely if it is not required for business operations, reducing the attack surface of the database system. Additionally, implementing proper network segmentation and monitoring protocols can help detect and prevent exploitation attempts, while regular vulnerability assessments should be conducted to identify other potential weaknesses in the database infrastructure that could be leveraged in conjunction with this vulnerability. The remediation process should also include comprehensive system auditing to ensure no unauthorized modifications were made during the vulnerability window and that all database access controls remain properly configured to prevent unauthorized access to sensitive data.