CVE-2023-48121 is an authentication bypass vulnerability in the Direct Connection Module of several Ezviz camera models, including CS-C6N-xxx, CS-CV310-xxx, CS-C6CN-xxx, and CS-C3N-xxx, all prior to version 5.3.x build 20230401. This vulnerability allows remote attackers to obtain sensitive information by sending crafted messages to the affected devices. The severity level of this vulnerability is classified as medium, with a CVSS score of 5.3.
The risk to organizations includes potential unauthorized access to sensitive information, making it essential for defenders to act swiftly. Given the nature of this vulnerability, attackers may leverage it to gain insights or manipulate device operations. Organizations should prioritize patching immediately to mitigate these risks.
Currently, there are no known public exploits or proofs of concept for this vulnerability. However, given the low complexity of the attack vector and the lack of required privileges or user interaction, it’s critical for organizations to remain vigilant and ensure their devices are updated.
Ezviz has been notified of this vulnerability, and users are encouraged to upgrade their firmware to the latest versions as a preventive measure. Organizations operating these devices must ensure they are scheduled for remediation in their patch cycles.
Vulnerability Details
The official description of CVE-2023-48121 states that it is an authentication bypass vulnerability in the Direct Connection Module of affected Ezviz models. The vulnerability has a CVSS score of 5.3, indicating a medium severity level. There are multiple affected products, including the Ezviz CS-C6N, CS-CV310, CS-C6CN, and CS-C3N, all versions prior to v5.3.x build 20230401.
The vulnerability falls under the CWE-287 category, related to improper authentication. The publication date for this vulnerability was November 28, 2023.
Technical Analysis
The root cause of this vulnerability stems from inadequate authentication mechanisms within the Direct Connection Module of the affected Ezviz devices. The attack vector is network-based, allowing attackers to exploit this flaw remotely. The attack complexity is classified as low, meaning an attacker can exploit this vulnerability without significant effort.
No privileges are required for an attacker to exploit this vulnerability, and there is no need for user interaction. The confidentiality impact is rated as low, indicating that sensitive information may be exposed, while integrity and availability impacts are rated as none.
Risk & Impact Analysis
Organizations deploying affected Ezviz products face a tangible risk due to this vulnerability. The potential for unauthorized access to sensitive information poses a significant risk to data security. As the vulnerability could be exploited remotely, the blast radius could extend beyond the immediate victims, potentially impacting broader organizational security.
Given the CVSS score of 5.3 and the lack of known exploits, organizations should assess the urgency of addressing this vulnerability based on their operational context. However, the low attack complexity indicates that organizations should not delay remediation efforts, and they should prioritize patching this vulnerability.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The affected versions of Ezviz products are as follows: CS-C6N-xxx, CS-CV310-xxx, CS-C6CN-xxx, and CS-C3N-xxx, all prior to v5.3.x build 20230401. Organizations should ensure that all devices are upgraded to the latest firmware versions to mitigate the risks associated with this vulnerability.
Mitigation & Remediation
To remediate this vulnerability, organizations should update affected Ezviz products to the latest firmware version. Specific attention should be paid to upgrading to version 5.3.x build 20230401 or newer. In instances where an immediate patch is unavailable, organizations should consider implementing network segmentation to limit exposure and monitoring for unusual traffic patterns that may indicate attempts to exploit this vulnerability.
Organizations should validate remediation through penetration testing to identify similar weaknesses.
Detection Guidance
Detection of this vulnerability can be aided by monitoring logs for unusual authentication attempts and analyzing network traffic for crafted messages targeting the affected devices. Security teams should be vigilant for behavioral anomalies that could indicate exploitation attempts.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2023-48121 lies in its illustration of the ongoing security challenges faced by IoT devices. As organizations increasingly rely on these technologies, vulnerabilities like this one highlight the need for robust security practices throughout the product lifecycle.
This vulnerability also serves as a reminder for security teams to prioritize proactive measures such as regular updates and thorough testing of device security. The potential for unauthorized access through such vulnerabilities underscores the importance of embedding security into the design and deployment of IoT solutions.
Organizations looking to enhance their overall security posture should consider implementing a comprehensive vulnerability management program to identify and address similar weaknesses in their technology stack.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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