CVE-2006-3127 in Java Enterprise System
Summary
by MITRE
Memory leak in Network Security Services (NSS) 3.11, as used in Sun Java Enterprise System 2003Q4 through 2005Q1 and Java System Directory Server 5.2, allows remote attackers to cause a denial of service (memory consumption) by performing a large number of RSA cryptographic operations.
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Analysis
by VulDB Data Team • 09/16/2017
The vulnerability identified as CVE-2006-3127 represents a critical memory management flaw within the Network Security Services (NSS) cryptographic library version 3.11. This issue affects widely deployed enterprise security infrastructure including Sun Java Enterprise System 2003Q4 through 2005Q1 and Java System Directory Server 5.2, making it particularly concerning for organizations relying on these platforms for secure communications and directory services. The vulnerability manifests as a memory leak during cryptographic operations, specifically when handling RSA key exchanges and other public key cryptographic functions that are fundamental to establishing secure connections in enterprise environments.
The technical root cause of this vulnerability lies in improper memory deallocation within the NSS library's handling of RSA cryptographic operations. When the system processes a large volume of RSA operations, the memory allocated for cryptographic contexts and temporary buffers is not properly released back to the system heap. This memory leak occurs incrementally with each cryptographic transaction, and while individual operations may appear to complete successfully, the cumulative effect results in progressive memory consumption that eventually exhausts available system resources. The flaw is particularly insidious because it does not immediately crash the system but instead gradually degrades performance until the service becomes unresponsive or completely fails, making it difficult to detect and diagnose compared to more immediate failure modes.
The operational impact of this vulnerability extends beyond simple denial of service, affecting the reliability and availability of critical enterprise services. Attackers can exploit this weakness by initiating a sustained barrage of RSA cryptographic operations against vulnerable systems, effectively consuming memory resources at an accelerating rate. This attack vector is particularly dangerous in directory services environments where authentication and secure communication are constantly required, as the memory consumption can lead to complete service outages that disrupt business operations. The vulnerability affects systems that rely heavily on SSL/TLS protocols, certificate validation, and secure directory services, making it a significant threat to enterprise security infrastructure. Organizations using these affected versions of Java Enterprise System and Directory Server face potential service disruption that could impact user authentication, secure data transmission, and overall system stability.
Mitigation strategies for CVE-2006-3127 primarily involve immediate patching of affected systems with updated versions of NSS that address the memory leak issue. System administrators should prioritize updating their Java Enterprise System installations and Java System Directory Server components to versions that contain corrected memory management routines for cryptographic operations. Additionally, implementing monitoring solutions to track memory consumption patterns can help detect exploitation attempts before they cause complete service disruption. Network segmentation and rate limiting of cryptographic operations can provide temporary protection while patches are deployed. Organizations should also consider implementing intrusion detection systems that can identify unusual patterns of cryptographic activity that may indicate exploitation attempts. This vulnerability aligns with CWE-401, which specifically addresses improper management of memory allocation and deallocation, and represents a classic example of how memory management flaws can be exploited for denial of service attacks within security infrastructure components. The ATT&CK framework categorizes this as a resource exhaustion technique where adversaries consume system resources to prevent legitimate use of services, making it a significant concern for enterprise security teams managing critical infrastructure components.