CVE-2023-48121 in CS-C6N-xxx
Summary
by MITRE • 11/28/2023
An authentication bypass vulnerability in the Direct Connection Module in Ezviz CS-C6N-xxx prior to v5.3.x build 20230401, Ezviz CS-CV310-xxx prior to v5.3.x build 20230401, Ezviz CS-C6CN-xxx prior to v5.3.x build 20230401, Ezviz CS-C3N-xxx prior to v5.3.x build 20230401 allows remote attackers to obtain sensitive information by sending crafted messages to the affected devices.
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Analysis
by VulDB Data Team • 12/20/2023
The vulnerability identified as CVE-2023-48121 represents a critical authentication bypass flaw within the Direct Connection Module of several Ezviz security camera models including CS-C6N-xxx, CS-CV310-xxx, CS-C6CN-xxx, and CS-C3N-xxx devices. This issue affects firmware versions prior to v5.3.x build 20230401, creating a persistent security weakness that enables unauthorized remote access to sensitive system information. The vulnerability specifically targets the authentication mechanisms implemented within the direct connection functionality, which is typically used for establishing secure communication channels between surveillance devices and monitoring systems. The flaw allows attackers to circumvent normal authentication procedures without requiring valid credentials, effectively providing unauthorized access to device management interfaces and potentially sensitive video feeds or configuration data.
Technical exploitation of this vulnerability occurs through the manipulation of network communications sent to affected devices, where crafted messages can trick the authentication module into accepting unauthorized requests. The underlying flaw likely stems from insufficient input validation or improper session management within the Direct Connection Module implementation, creating a pathway for remote attackers to bypass authentication checks. This type of vulnerability falls under the CWE-287 category of improper authentication, which is classified as a critical weakness in software security architectures. The vulnerability's remote exploitability means that attackers can potentially target these devices from outside the local network without requiring physical access or legitimate credentials, significantly expanding the attack surface and potential impact.
The operational impact of this vulnerability extends beyond simple unauthorized access, as it can lead to complete compromise of surveillance systems and exposure of sensitive information. Attackers who successfully exploit this vulnerability may gain access to live video streams, device configuration settings, user credentials, and other confidential data stored on or accessible through the affected devices. The compromised systems could be used as entry points for broader network infiltration, potentially enabling attackers to pivot to other connected devices or systems within the organization's infrastructure. This vulnerability particularly affects security-conscious environments where surveillance cameras are deployed for monitoring critical assets, making the potential consequences severe for organizations relying on these systems for security operations.
Organizations affected by this vulnerability should immediately implement mitigations including firmware updates to version v5.3.x build 20230401 or later, which contain the necessary patches to address the authentication bypass flaw. Network segmentation and firewall rules should be implemented to restrict access to these devices, particularly limiting direct internet access to the affected ports and protocols. Regular security audits and vulnerability assessments should be conducted to identify any remaining exposed devices or systems that may be vulnerable to similar authentication bypass attacks. The ATT&CK framework categorizes this type of vulnerability under T1078 Valid Accounts and T1190 Exploit Public-Facing Application, highlighting the importance of proper access controls and regular patch management. Additionally, organizations should consider implementing network monitoring solutions to detect anomalous traffic patterns that may indicate exploitation attempts against these vulnerable devices.