CVE-2011-2762 in Lifesize Room Appliance Software
Summary
by MITRE
The web interface on the LifeSize Room appliance LS_RM1_3.5.3 (11) allows remote attackers to bypass authentication via unspecified data associated with a "true" authentication status, related to AMF data and the LSRoom_Remoting.authenticate function in gateway.php.
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Analysis
by VulDB Data Team • 12/28/2024
The vulnerability identified as CVE-2011-2762 affects the LifeSize Room appliance LS_RM1_3.5.3 (11) web interface, representing a critical authentication bypass flaw that enables remote attackers to gain unauthorized access to the device. This vulnerability specifically targets the AMF (Action Message Format) data processing mechanism within the appliance's remoting framework, where the LSRoom_Remoting.authenticate function fails to properly validate authentication status indicators. The flaw exists in the gateway.php file which serves as the primary interface for remote communication and authentication handling within the device's web-based management system.
The technical implementation of this vulnerability stems from improper validation of authentication data within the AMF serialization process. When legitimate authentication requests are processed through the LSRoom_Remoting.authenticate function, the system fails to adequately verify the authenticity of the AMF data structure that contains the authentication status indicator. This allows attackers to manipulate the AMF data payload to include a "true" authentication status value without actually providing valid credentials, effectively bypassing the authentication mechanism entirely. The vulnerability is particularly concerning because it operates at the application layer and requires no local access or prior authentication to exploit, making it highly accessible to remote attackers.
The operational impact of this vulnerability is severe as it provides complete unauthorized access to the LifeSize Room appliance's administrative functions, including configuration changes, device management, and potentially access to sensitive network resources. Attackers could leverage this vulnerability to perform man-in-the-middle attacks, modify device settings, install malicious firmware, or use the appliance as a pivot point to access other systems within the network. The affected device operates in enterprise environments where video conferencing systems are often integrated into critical business infrastructure, making this vulnerability particularly dangerous for organizations relying on secure communications. This vulnerability aligns with CWE-287, which addresses improper handling of authentication tokens, and represents a classic case of authentication bypass through manipulation of serialized data structures.
Mitigation strategies for this vulnerability should include immediate firmware updates from LifeSize to address the authentication bypass flaw, network segmentation to limit access to the appliance, and implementation of network access controls to restrict communication to trusted sources only. Organizations should also consider disabling unnecessary web interfaces and implementing additional authentication layers such as two-factor authentication or certificate-based authentication. The remediation process should involve thorough network monitoring to detect potential exploitation attempts and regular security assessments of video conferencing infrastructure. This vulnerability demonstrates the importance of proper input validation and authentication handling in web applications, particularly when dealing with serialized data formats like AMF that are commonly used in rich internet applications and remote procedure call systems. Organizations should also implement the principle of least privilege and ensure that administrative interfaces are properly secured with strong authentication mechanisms and regular security audits to prevent similar vulnerabilities from being exploited in other networked devices and applications.