CVE-2022-41832 in BIG-IP
Summary
by MITRE • 10/20/2022
In BIG-IP versions 17.0.x before 17.0.0.1, 16.1.x before 16.1.3.1, 15.1.x before 15.1.6.1, 14.1.x before 14.1.5.1, and 13.1.x before 13.1.5.1, when a SIP profile is configured on a virtual server, undisclosed messages can cause an increase in memory resource utilization.
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Analysis
by VulDB Data Team • 10/20/2022
The vulnerability identified as CVE-2022-41832 affects F5 BIG-IP network security appliances across multiple version lines including 17.0.x before 17.0.0.1, 16.1.x before 16.1.3.1, 15.1.x before 15.1.6.1, 14.1.x before 14.1.5.1, and 13.1.x before 13.1.5.1. This issue specifically impacts systems configured with SIP profiles on virtual servers, representing a significant concern for organizations relying on these appliances for voice over IP communications and network traffic management. The vulnerability falls under the category of resource exhaustion attacks that can lead to service disruption and potential system instability.
The technical flaw manifests when the BIG-IP system processes undisclosed SIP messages through a configured SIP profile on a virtual server. This processing causes an abnormal increase in memory resource utilization without proper bounds checking or resource management controls. The vulnerability operates at the application layer where SIP protocol handling occurs, making it particularly dangerous as it can be exploited through legitimate network traffic patterns that appear normal to security monitoring systems. The memory consumption increases progressively with each affected message, potentially leading to system performance degradation or complete memory exhaustion that results in service interruption.
From an operational impact perspective, this vulnerability presents a substantial risk to enterprise network infrastructure as it can be exploited by malicious actors to perform denial of service attacks against critical communication systems. The memory exhaustion effect can cause the BIG-IP appliance to become unresponsive, leading to disruption of voice services, SIP trunking, and other critical network functions. Organizations utilizing these appliances for mission-critical communications may experience significant downtime and service degradation, particularly in environments where SIP traffic is heavy or where the appliances are already operating near capacity. The vulnerability is particularly concerning because it can be triggered by seemingly benign SIP messages, making detection and prevention challenging.
The underlying weakness aligns with CWE-400, which addresses unchecked resource consumption, and represents a classic example of a resource exhaustion vulnerability that can be leveraged through the ATT&CK framework's privilege escalation and denial of service tactics. Organizations should implement immediate mitigations including applying the relevant security patches provided by F5, implementing network segmentation to limit exposure, and monitoring for unusual memory consumption patterns. Additionally, implementing rate limiting on SIP traffic and configuring proper resource monitoring can help detect and prevent exploitation attempts. The vulnerability underscores the importance of maintaining up-to-date security patches and implementing comprehensive network monitoring strategies to protect against such resource exhaustion attacks that can compromise critical infrastructure services.