CVE-2020-25868 in Infinity
Summary
by MITRE • 07/07/2021
Pexip Infinity 22.x through 24.x before 24.2 has Improper Input Validation for call setup. An unauthenticated remote attacker can trigger a software abort (temporary loss of service).
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Analysis
by VulDB Data Team • 07/10/2021
The vulnerability identified as CVE-2020-25868 affects Pexip Infinity versions 22.x through 24.x prior to 24.2, representing a critical weakness in the system's call setup validation mechanisms. This issue stems from inadequate input validation during the call initiation process, creating a pathway for malicious actors to exploit the platform's communication infrastructure. The vulnerability specifically targets the call setup functionality, which serves as a fundamental component of the video conferencing and communication system, making it a prime target for service disruption attacks.
The technical flaw manifests as improper input validation that fails to adequately sanitize or verify the parameters provided during call establishment. An unauthenticated remote attacker can leverage this weakness to send malformed or malicious input data to the system's call setup endpoints, causing the software to experience a critical failure that results in a temporary service abort. This type of vulnerability falls under the CWE-20 category of "Improper Input Validation," which is classified as a common weakness in software development practices where systems fail to properly validate user-supplied data before processing it. The attack vector requires no authentication credentials, making it particularly dangerous as it can be exploited by anyone with network access to the affected system.
The operational impact of this vulnerability extends beyond simple service disruption, as it can be used to create denial-of-service conditions that affect legitimate users and business operations. Organizations relying on Pexip Infinity for critical communication infrastructure may experience temporary loss of service during attack execution, potentially disrupting important meetings, conferences, and collaborative activities. The temporary nature of the service loss does not diminish the severity of the impact, as even brief interruptions can have significant consequences in time-sensitive business environments. From an attacker's perspective, this vulnerability represents a low-effort, high-impact method for causing operational disruption, aligning with ATT&CK technique T1499.004 for network denial of service attacks.
Organizations should prioritize immediate remediation by upgrading to Pexip Infinity version 24.2 or later, which contains the necessary patches to address the input validation issues. Additionally, network-level mitigations such as implementing firewall rules to restrict access to call setup endpoints and deploying intrusion detection systems can help reduce the attack surface. The vulnerability demonstrates the importance of proper input validation in communication systems, particularly those handling real-time data streams where malformed input can cause cascading failures. Security teams should also consider implementing monitoring for unusual call setup patterns and establish incident response procedures to address potential exploitation attempts. The weakness highlights the critical need for comprehensive testing of input validation mechanisms in telecommunications infrastructure, as failures in this area can compromise entire communication networks.