CVE-2004-2216 in Java System Application Server
Summary
by MITRE
Unknown vulnerability in Sun Java System Web Server 6.0 SP7 and earlier and 6.1 SP1 and earlier, and Application Server 7 Update 4 and earlier, allows remote attackers to cause a denial of service (crash) via a malformed client certificate.
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Analysis
by VulDB Data Team • 07/17/2017
This vulnerability affects multiple Sun Microsystems products including the Java System Web Server and Application Server, representing a critical security flaw that enables remote attackers to induce system crashes through crafted client certificates. The vulnerability stems from insufficient input validation mechanisms within the certificate processing pipeline, where malformed certificate data fails to be properly sanitized before being processed by the server components. This issue manifests as a denial of service condition that can be triggered over the network without requiring authentication or privileged access, making it particularly dangerous in production environments where availability is critical.
The technical implementation of this vulnerability involves the server's failure to adequately validate the structure and content of client certificates during the SSL/TLS handshake process. When a malformed certificate is presented by a client, the server's certificate parsing routines do not implement proper bounds checking or data integrity validation, leading to memory corruption or unexpected execution paths that ultimately result in application termination. This behavior aligns with common software security weaknesses documented under CWE-129 and CWE-131 categories, which focus on insufficient input validation and improper handling of buffer boundaries. The vulnerability exists across multiple product versions including Web Server 6.0 SP7 and earlier, 6.1 SP1 and earlier, and Application Server 7 Update 4 and earlier, indicating a widespread issue within the Sun Microsystems product ecosystem.
From an operational perspective, this vulnerability presents significant risks to organizations relying on these server platforms, as attackers can easily disrupt service availability through simple network-based attacks. The impact extends beyond mere service interruption to potentially affect business continuity and customer satisfaction, particularly in scenarios where these servers handle critical web applications or enterprise services. The vulnerability's remote exploitability means that attackers can trigger the denial of service condition from anywhere on the internet, without requiring physical access or prior authentication credentials. This characteristic places the vulnerability in the ATT&CK framework under the T1499 category for Network Denial of Service, with potential for broader impact when combined with other attack vectors.
The mitigation strategies for this vulnerability primarily involve applying vendor-provided patches and updates to affected versions of the Sun Java System products. Organizations should prioritize immediate deployment of security updates from Oracle (formerly Sun Microsystems) that address the certificate validation routines and implement proper input sanitization measures. Additionally, network-level defenses such as intrusion prevention systems can be configured to monitor for suspicious certificate patterns, though these measures are secondary to proper patch management. System administrators should also consider implementing certificate validation policies that enforce stricter requirements for client certificates and monitor for unusual certificate characteristics that might indicate attempted exploitation. The vulnerability serves as a reminder of the importance of robust input validation in security-critical components and highlights the necessity of comprehensive testing procedures for cryptographic protocols.