CVE-2023-4463 in CCX 400
Summary
by MITRE • 12/29/2023
A vulnerability classified as problematic was found in Poly CCX 400, CCX 600, Trio 8800 and Trio C60. This vulnerability affects unknown code of the component HTTP Header Handler. The manipulation of the argument Cookie leads to denial of service. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used. The identifier of this vulnerability is VDB-249256.
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Analysis
by VulDB Data Team • 01/21/2024
This vulnerability resides within the HTTP header handler component of Poly CCX 400, CCX 600, Trio 8800, and Trio C60 video conferencing devices, representing a significant security weakness that could compromise system availability. The flaw specifically manifests when processing the Cookie argument within HTTP headers, creating a potential denial of service condition that can be exploited remotely by attackers. The vulnerability has been publicly disclosed and is actively being used in the wild, making it a pressing concern for organizations relying on these communication devices. The affected devices operate within enterprise environments where reliable video conferencing services are critical for business operations, making this vulnerability particularly dangerous as it could disrupt critical communication infrastructure.
The technical implementation of this vulnerability stems from inadequate input validation within the HTTP header processing mechanism, specifically when handling Cookie parameters. When an attacker crafts malicious HTTP requests containing specially formatted Cookie values, the device's HTTP header handler fails to properly sanitize or validate these inputs, leading to a system crash or complete service disruption. This represents a classic input validation flaw that aligns with CWE-20, which describes improper input validation as a fundamental weakness in software security. The vulnerability's remote exploitability means that attackers do not require physical access to the devices, allowing them to target systems from anywhere on the network, potentially from external internet-facing interfaces where these conferencing devices are often exposed.
The operational impact of this vulnerability extends beyond simple service disruption, as video conferencing systems are integral to modern business operations, remote work environments, and critical communication channels. Organizations may experience significant downtime during attacks, affecting productivity, customer service, and potentially leading to financial losses. The vulnerability's presence in multiple device models suggests a widespread impact across Poly's product line, potentially affecting thousands of installations globally. Security teams must consider the cascading effects of such an attack, as disruption to video conferencing infrastructure can impact collaboration across departments, customer engagement, and emergency communication protocols. The public disclosure of the exploit means that threat actors have readily available tools to execute attacks, increasing the probability and urgency of exploitation.
Mitigation strategies should prioritize immediate patching of affected devices through official firmware updates provided by Poly, as this represents the most effective defense against the vulnerability. Network segmentation and firewall rules should be implemented to restrict access to these devices from untrusted networks, limiting the attack surface. Additionally, monitoring systems should be enhanced to detect anomalous HTTP header patterns that might indicate exploitation attempts, leveraging intrusion detection systems to identify potential malicious activity. Organizations should also consider implementing rate limiting and input validation controls at network boundaries to prevent exploitation attempts. The vulnerability's classification as a denial of service issue aligns with ATT&CK technique T1499, which covers network denial of service attacks, and organizations should incorporate these mitigation strategies into their broader cybersecurity frameworks to prevent successful exploitation attempts.