CVE-2021-41419 Scanner

QVIS NVR/DVR systems are broadly used for video surveillance in many environments such as businesses and homes to enhance security and monitoring capabilities. These systems provide users with the ability to manage and store video feeds securely. QVIS is a prominent manufacturer of DVRs and NVRs, offering various features that cater to the needs of modern surveillance requirements. The software enables easy access and management through web interfaces, APIs, and mobile applications, making it versatile for users across different platforms. The product is relied upon for its robust performance and support, serving as a cornerstone for security infrastructures. Its deployment is global, encompassing retail, industrial, and residential sectors to ensure safety and surveillance efficacy.

The Remote Code Execution vulnerability allows attackers to execute arbitrary code remotely on the affected systems. It stems from Java deserialization processes, where untrusted inputs are not properly sanitized. This type of exploit can grant extensive control over affected systems, allowing malicious actors to implement system-wide changes or extract sensitive information. The flaw was identified in firmware versions released before December 13, 2021, necessitating immediate attention to prevent unauthorized access. Such vulnerabilities are critical, requiring comprehensive patching and updates from manufacturers to mitigate potential exploits. RCE vulnerabilities are particularly severe as they can often lead to full system compromise if left unaddressed.

Technically, the vulnerability resides within the Java serialization process, where user inputs that are deserialized can trigger the execution of unintended operations. The vulnerable endpoint is "index.faces", where injection of malicious serialized Java objects can occur. As a result, scrutinizing user inputs and validating them before processing becomes pivotal. Attackers can manipulate HTTP requests to trigger this vulnerability, leading to command execution on the device. The use of specially crafted payloads enables attackers to remotely interact with the NVR/DVR system through exploited serialization flaws. This vulnerability is exacerbated by network exposure, increasing the risk of remote manipulation by unauthorized users.

Successful exploitation of this vulnerability may lead to full system compromise, allowing attackers to control affected devices and networks. This can result in unauthorized access to sensitive video feeds and data, theft of surveillance footage, and potentially the manipulation of system settings. Such exploits can disrupt surveillance operations and lead to privacy invasions, posing significant security risks to enterprises and individuals leveraging these systems. The compromised systems could also serve as pivot points for attacks on wider network infrastructures, further heightening security concerns. Prompt remediation and patch management are critical to safeguard against such impactful scenarios.

REFERENCES

• https://nvd.nist.gov/vuln/detail/CVE-2021-41419
• https://gist.github.com/Meeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee/712ac36c8a08e2698e875169442a23a4