CVE-2009-2860 in db2
Summary
by MITRE
Unspecified vulnerability in db2jds in IBM DB2 8.1 before FP18 allows remote attackers to cause a denial of service (service crash) via "malicious packets."
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Analysis
by VulDB Data Team • 08/20/2021
The vulnerability identified as CVE-2009-2860 represents a critical denial of service weakness within IBM DB2 8.1 database server software, specifically affecting the db2jds component. This issue manifests as an unspecified flaw that enables remote attackers to trigger service instability through the transmission of malicious network packets. The vulnerability exists in the database server's handling of incoming network traffic, particularly within the Java Database Connectivity driver implementation that facilitates communication between applications and the database engine. Attackers can exploit this weakness to cause the targeted database service to crash or become unresponsive, effectively disrupting business operations and data access capabilities.
The technical nature of this vulnerability falls under the category of input validation and error handling deficiencies within network protocol processing. When the db2jds component receives malformed or specially crafted packets, it fails to properly validate the incoming data structure, leading to unpredictable behavior that ultimately results in service termination. This type of vulnerability typically stems from inadequate bounds checking, buffer overflow conditions, or improper exception handling mechanisms within the network packet parsing routines. The flaw demonstrates poor defensive programming practices where the system does not adequately sanitize or validate external inputs before processing them, creating an attack surface that can be exploited without requiring authentication or elevated privileges.
From an operational impact perspective, this vulnerability poses significant risk to enterprise environments that rely heavily on IBM DB2 8.1 for critical business operations. A successful exploitation can result in complete service disruption, forcing database administrators to restart services manually and potentially causing data loss or corruption during unexpected shutdowns. The remote nature of the attack means that malicious actors can target vulnerable systems from anywhere on the network, making it particularly dangerous in environments where database servers are exposed to external traffic. Organizations may experience downtime that affects multiple applications simultaneously, as database connectivity issues cascade through dependent systems and services. The vulnerability also creates opportunities for attackers to perform reconnaissance activities or establish persistent access points within network infrastructure.
Organizations should implement immediate mitigations including applying the official IBM fix pack FP18 or later versions that address this specific vulnerability. Network segmentation and firewall rules should be configured to limit direct access to database ports from untrusted networks, while monitoring systems should be deployed to detect unusual traffic patterns that might indicate exploitation attempts. The vulnerability aligns with CWE-129, Input Validation, and CWE-20, Improper Input Validation, as it demonstrates how insufficient validation of network inputs can lead to system instability. From an attacker perspective, this vulnerability maps to ATT&CK technique T1499.004, Endpoint Denial of Service, and T1595.001, Network Infrastructure Devices, indicating how attackers can leverage such weaknesses to disrupt service availability. Regular vulnerability assessments and security patch management processes should be prioritized to prevent similar issues from arising in other components of the database infrastructure.