CVE-2009-0120 in WebSphere DataPower XML Security Gateway XS40
Summary
by MITRE
The IBM WebSphere DataPower XML Security Gateway XS40 with firmware 3.6.1.5 allows remote attackers to cause a denial of service (device reboot) by sending data over an established SSL connection, as demonstrated by the abc\r\n\r\n string data.
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Analysis
by VulDB Data Team • 12/28/2024
The vulnerability identified as CVE-2009-0120 affects the IBM WebSphere DataPower XML Security Gateway XS40 device running firmware version 3.6.1.5. This critical security flaw represents a remote denial of service condition that can be exploited by attackers positioned outside the network perimeter. The vulnerability specifically manifests when malicious data is transmitted over an existing SSL connection to the device, potentially causing the system to crash and reboot unexpectedly. The demonstration of this exploit uses the simple string "abc" as the payload, indicating that the vulnerability may be triggered by seemingly innocuous data sequences that can still cause significant operational disruption.
This vulnerability falls under the category of improper input validation and memory management issues, which are commonly classified under CWE-129 and CWE-119 in the Common Weakness Enumeration catalog. The flaw demonstrates a classic buffer overflow or memory corruption vulnerability where the device fails to properly validate or handle incoming data streams over SSL connections. The attack vector is particularly concerning because it requires only a single established SSL connection to the device, making it accessible to attackers who may have already gained some level of network access or who can perform connection hijacking techniques. The device's failure to properly sanitize input data during SSL session processing creates an exploitable condition that can be leveraged for sustained disruption of service.
The operational impact of this vulnerability extends beyond simple device unavailability, as the repeated exploitation can lead to extended periods of service disruption that may affect enterprise-level security infrastructure. Organizations relying on DataPower gateways for XML security and API management may experience cascading failures in their security operations, potentially leading to unauthorized access to protected systems or data breaches. The reboot condition effectively neutralizes the device's security functions, leaving network traffic potentially unfiltered or unprotected during the recovery period. This vulnerability directly impacts the availability aspect of the CIA triad and can be classified under the ATT&CK technique T1499.004 for network denial of service attacks.
Mitigation strategies for this vulnerability should include immediate firmware updates from IBM to address the specific memory handling and input validation flaws. Network administrators should implement strict access controls to limit which systems can establish SSL connections to the DataPower device, reducing the attack surface. Additional protective measures include implementing intrusion detection systems that can monitor for unusual SSL traffic patterns and establishing automated monitoring for device reboot events. Organizations should also consider network segmentation to isolate the DataPower devices from critical internal systems and implement regular security assessments to identify similar vulnerabilities in other network security appliances. The remediation process should include thorough testing of updated firmware in controlled environments before deployment to production systems to ensure compatibility with existing security policies and operational procedures.