CVE-2006-2706 in C5 Enterprise Vulnerability Management
Summary
by MITRE
Secure Elements Class 5 AVR server (aka C5 EVM) before 2.8.1 allows remote attackers to cause a denial of service via forged "session start" messages that cause AVR to connect to arbitrary hosts.
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Analysis
by VulDB Data Team • 11/24/2024
The vulnerability identified as CVE-2006-2706 affects the Secure Elements Class 5 AVR server, also known as the C5 EVM, version 2.8.1 and earlier. This represents a significant security flaw in the authentication and connection handling mechanisms of the system, which operates within the telecommunications infrastructure domain. The vulnerability stems from insufficient validation of session initiation messages, specifically those related to the "session start" protocol component. The affected system is designed to manage secure communications and authentication processes, making this flaw particularly concerning for network security operations.
The technical flaw manifests when the AVR server receives forged "session start" messages that appear legitimate but are crafted by unauthorized parties. These malicious messages contain deceptive parameters that cause the AVR server to establish connections with arbitrary hosts that are not part of the intended network topology. The vulnerability lies in the lack of proper message authentication and validation routines that should verify the legitimacy of connection requests before initiating network communication. This weakness allows attackers to manipulate the server's connection behavior through crafted network packets that exploit the trust relationship inherent in the session establishment protocol.
The operational impact of this vulnerability extends beyond simple denial of service conditions, as it provides attackers with the capability to redirect network traffic to unintended destinations. The potential consequences include unauthorized access to network resources, data interception, and disruption of legitimate communication channels. Attackers can leverage this vulnerability to perform man-in-the-middle attacks or create unauthorized communication paths that bypass normal security controls. The vulnerability affects the availability and integrity of the network services provided by the affected system, potentially compromising the entire security infrastructure that relies on the AVR server for authentication and connection management.
Mitigation strategies for this vulnerability should focus on implementing robust message authentication mechanisms and strengthening the validation of session initiation requests. Network administrators should upgrade to version 2.8.1 or later of the Secure Elements Class 5 AVR server to receive the patched authentication routines. Additional protective measures include implementing network segmentation, deploying intrusion detection systems to monitor for suspicious session start messages, and establishing strict access controls for network communication. The vulnerability aligns with CWE-284, which addresses improper access control in system components, and represents a specific instance of the broader category of authentication bypass vulnerabilities. From an ATT&CK framework perspective, this vulnerability maps to the T1071.004 technique involving application layer protocol manipulation, and the T1499.004 technique related to network denial of service attacks. Organizations should also consider implementing network monitoring solutions that can detect anomalous connection patterns and unauthorized host connectivity attempts that may indicate exploitation of this vulnerability.