CVE-2022-29286 in Infinity
Summary
by MITRE • 07/18/2022
Pexip Infinity 27 before 28.0 allows remote attackers to trigger excessive resource consumption and termination because of registrar resource mishandling.
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Analysis
by VulDB Data Team • 08/01/2022
The vulnerability identified as CVE-2022-29286 affects Pexip Infinity 27 before version 28.0 and represents a critical resource exhaustion flaw that can lead to system termination. This issue stems from improper handling of registrar resources within the communication platform, creating a pathway for remote attackers to exploit the system's resource management mechanisms. The vulnerability operates at the core of the platform's signaling and registration processes, where the registrar component fails to properly manage allocated resources during connection establishment and maintenance phases.
The technical flaw manifests through the mishandling of resources that are allocated during the SIP registration process, which is fundamental to the operation of unified communications systems. When attackers send malicious registration requests or manipulate existing registration states, the system's registrar component does not adequately clean up or limit resource allocation, leading to progressive consumption of memory, CPU cycles, and other system resources. This resource mismanagement creates a condition where legitimate users may be unable to establish connections while the system becomes increasingly unstable and eventually terminates.
From an operational impact perspective, this vulnerability presents a significant threat to enterprise communication infrastructure as it enables denial of service attacks that can disrupt critical business operations. The remote nature of the exploit means that attackers can target the system from outside the network perimeter without requiring authentication or physical access. The gradual resource consumption pattern makes detection challenging for administrators, as the system may appear normal while slowly degrading performance until complete termination occurs. Organizations relying on Pexip Infinity for voice and video conferencing services face potential disruptions to their communication capabilities, which could have cascading effects on business continuity and customer service operations.
The vulnerability aligns with CWE-400, which addresses unchecked resource consumption, and demonstrates characteristics consistent with the ATT&CK technique T1499.004 for network denial of service attacks. Organizations should implement immediate mitigations including updating to Pexip Infinity version 28.0 or later, which contains the necessary patches to address the registrar resource handling issues. Additional protective measures include implementing rate limiting on registration requests, monitoring resource utilization patterns for unusual spikes, and configuring intrusion detection systems to identify suspicious registration behaviors. Network segmentation and access controls can also limit the attack surface while the primary patch is being deployed, ensuring that only authorized endpoints can access the registrar services.
The root cause analysis reveals that the registrar component lacks proper resource accounting and cleanup mechanisms, particularly when handling malformed or excessive registration requests. This deficiency creates a resource leak scenario where allocated memory and processing resources are not properly released back to the system, leading to progressive degradation. The vulnerability underscores the importance of proper resource management in real-time communication systems where continuous operation is critical for business functions. Organizations should also consider implementing automated monitoring solutions that can detect resource consumption anomalies and trigger alerts before system termination occurs, providing early warning capabilities for potential exploitation attempts.