CVE-2021-33045 Scanner

Dahua IPC/VTH/VTO systems are utilized in various surveillance and security contexts by both public and private entities. These products are often installed in residential, commercial, and industrial environments to monitor and manage access to facilities. Security companies and building management teams typically install these systems to ensure safety and security. With capabilities for remote monitoring and control, they offer versatile solutions for surveillance needs. Dahua products are known for their reliability, high-definition video quality, and ease of integration with existing security infrastructures. These systems are essential tools in today's security operations, providing constant vigilance and peace of mind.

The authentication bypass vulnerability in Dahua IPC/VTH/VTO allows attackers to circumvent regular login processes. This vulnerability critically undermines the access control mechanism, enabling unauthorized users to gain access to the device. By crafting specific data packets, a malicious actor can simulate an authenticated session. This exposes the system to further risks, including unauthorized access to sensitive data and settings. This authentication flaw significantly compromises the security integrity of the device, creating a potential entry point for further system infiltration. It is a critical weakness that needs immediate attention and mitigation.

Technical exploitation of this vulnerability involves submitting crafted login data through the device's HTTP interface. The vulnerability is typically exploited by posting specific JSON parameters that mimic the credentials of an authenticated session. Attackers focus on the RPC2_Login endpoint, sending data that bypasses normal session establishment protocols. Vulnerable parameters include the session and result fields, which can be manipulated to appear legitimate. Successful exploitation results in a 200 HTTP status response, confirming unauthorized access. This method relies on the intrinsic flaws within the device’s authentication logic.

The potential effects of exploiting this vulnerability are significant. Unauthorized access to video feeds and device settings could lead to privacy violations and compromised surveillance operations. Attackers may alter system configurations or disable the device, leading to a complete loss of monitoring capability. There is also a risk of data theft, as sensitive information could be exfiltrated by unauthorized users. Furthermore, the vulnerability could serve as a stepping stone for deeper network penetration, allowing attackers to launch further attacks within the compromised network. Overall, this vulnerability poses a serious security threat to affected systems.

REFERENCES

• https://seclists.org/fulldisclosure/2021/Oct/13
• https://www.dahuasecurity.com/aboutUs/trustedCenter/details/582