Ruijie NBR Arbitrary File Upload Scanner

Ruijie NBR is commonly used in enterprise network environments to manage and route data securely. It is designed for organizations that need a reliable networking solution, offering features like bandwidth management, VPN support, and firewall protection. System administrators and network engineers utilize Ruijie NBR to ensure optimal network performance and security. However, vulnerabilities in this product can compromise network security and data integrity. It is crucial for users to keep the system updated and monitor for any potential security flaws. Ensuring proper configuration and regular updates are essential steps in maintaining the safety of networks using Ruijie NBR.

The Arbitrary File Upload vulnerability allows attackers to upload potentially harmful files to the server. This type of vulnerability is significant because it can lead to further exploitation, such as remote code execution. Attackers use this flaw to bypass security mechanisms and introduce malicious content into the server environment. It's imperative to identify and remediate these vulnerabilities promptly to protect sensitive data and infrastructure. The server's ability to validate and restrict uploads is a critical factor in preventing this risk. Such vulnerabilities usually arise from improper input validation or configuration errors.

The technical details of the vulnerability involve a lack of proper validation in the fileupload.php script. An attacker can manipulate the "uploadDir" and "name" parameters to upload executable files, like PHP scripts, which get stored unchecked. Using specific HTTP requests, attackers exploit this flaw to execute unwanted commands on the server. The vulnerability becomes apparent because it permits file uploads without adequate security checks. Exploiting this typically involves sending crafted requests containing malicious payloads. Securing upload endpoints and employing strict content type checks can mitigate these risks.

When exploited, this vulnerability allows unauthorized file uploads, potentially leading to server compromise and data breaches. Attackers can gain elevated privileges, execute arbitrary code, or add backdoors for persistent access. This loss of control can also lead to data theft, system crashes, and network infiltration. Organizations might face severe financial and reputational damage as a result of such incidents. Addressing these vulnerabilities is crucial for protecting organizational assets and ensuring operational continuity. Prompt action helps in preventing exploitation and mitigating its damaging impacts.

REFERENCES

• https://github.com/zan8in/afrog/blob/main/v2/pocs/afrog-pocs/vulnerability/ruijie-nbr-fileupload.yaml