AVCON6 Arbitrary File Download Scanner

The AVCON6 system management platform is utilized primarily by IT administrators and system managers for configuring, monitoring, and controlling different systems within an organizational infrastructure. It serves as a centralized platform to efficiently manage a network of devices and applications across various sectors, ranging from telecommunications to enterprise environments. The platform provides essential functionalities such as network monitoring, system inventory management, and patch deployment. Its design allows for the seamless integration of third-party plugins, enhancing its management capabilities. The platform is typically deployed in environments where comprehensive and automated management solutions are necessary for maintaining operational efficiency. Affected parties rely on AVCON6 for its robust data management and secure communication features, both critical for ensuring uninterrupted service delivery in large-scale operations.

The Arbitrary File Download vulnerability allows attackers to exploit the system by targeting a specific download endpoint, enabling unauthorized file access and retrieval. This vulnerability often arises from improper handling of file paths, allowing malicious users to specify arbitrary file locations on the server. Such exploitation can compromise the confidentiality and integrity of data stored within the application’s infrastructure. Attackers commonly use path traversal techniques to navigate to and download sensitive files that should otherwise be restricted. This kind of vulnerability is particularly critical as it can lead to further intrusion opportunities, including data theft or system manipulation through file tampering. Organizations using systems with this vulnerability face substantial risks as attackers could gain access to highly sensitive information stored on the server.

The vulnerability in the AVCON6 system management platform is located within the download.action endpoint, where insufficient validation of user-supplied input leads to arbitrary file access. The system fails to sanitize the filename parameter properly, allowing attackers to input relative path segments like "../../../../../../etc/passwd" and retrieve unauthorized files. Once these arbitrary file paths are exploited, sensitive data can be downloaded from the server, which could include critical system files or confidential application data. The parameter in question effectively acts as an attack vector due to its insufficient boundary checks and malformed input handling. The vulnerability's exploitation involves crafting a malicious request to trigger the download mechanism, bypassing standard authorization controls. Mitigating this vulnerability requires rigorous input validation and implementing a stringent file access policy to prevent unintended data exposure.

Exploiting this vulnerability can have substantial consequences for affected organizations. Successful arbitrary file download attacks might result in the exposure of sensitive data such as system configuration files, password files, or confidential business documents. These breaches can lead to reputational damage, legal ramifications, and financial loss. Furthermore, attackers can leverage obtained information to execute additional attacks, such as privilege escalation or lateral movement within the network, potentially compromising additional systems. Additionally, the unauthorized disclosure of sensitive data could undermine client trust and disrupt operational processes. Therefore, addressing this vulnerability is paramount in preserving data integrity and maintaining the security posture of the organization’s digital assets.

REFERENCES

• https://github.com/Threekiii/Awesome-POC/blob/master/Web%E5%BA%94%E7%94%A8%E6%BC%8F%E6%B4%9E/AVCON6%20%E7%B3%BB%E7%BB%9F%E7%AE%A1%E7%90%86%E5%B9%B3%E5%8F%B0%20download.action%20%E4%BB%BB%E6%84%8F%E6%96%87%E4%BB%B6%E4%B8%8B%E8%BD%BD%E6%BC%8F%E6%B4%9E.md