CVE-2025-14528 Scanner

D-Link DIR-803 routers are commonly used in small businesses and home networks for providing internet connectivity and network security. These routers are typically managed by IT administrators or end-users with basic networking knowledge. They offer functionalities such as wireless connections, firewall protections, and network management. The DIR-803 model is part of the D-Link wireless N300 family, known for its ease of setup and use. It serves the purpose of connecting multiple devices to the internet while providing security against external threats. However, vulnerabilities like authentication bypass could significantly compromise the security it is supposed to provide.

The Authentication Bypass vulnerability allows attackers to bypass normal authentication mechanisms, often by manipulating input to gain unauthorized access. In this scenario, attackers exploit the AUTHORIZED_GROUP parameter in the router's configuration file. The vulnerability allows unauthorized users to view sensitive XML configuration files, potentially exposing admin credentials. Attackers could leverage this flaw to gain control over the router, leading to further attacks on connected networks or data interception. Such vulnerabilities underscore the importance of regular updates and patch management.

Technically, this vulnerability is exploited by sending HTTP requests that manipulate specific parameters within the router's configuration scripts. Specifically, the vulnerability involves newline injection in the AUTHORIZED_GROUP parameter within the /getcfg.php file. Requests that meet certain conditions allow attackers to retrieve XML configuration files, including administrative credentials. The conditions include the presence of specific XML elements such as , , and , and the response must have a content type of text/xml with an HTTP status of 200. Such specific conditions enable targeted attacks by knowledgeable adversaries.

Exploitation of this vulnerability could result in several adverse effects. Attackers could gain unauthorized access to the device, leading to a loss of confidentiality as sensitive information such as administrator credentials are disclosed. This access could be extended to manipulate or alter directory configurations, intercept data traffic, or further exploit connected devices. Such unauthorized control poses a significant risk to the integrity and availability of the device's network functions. Additionally, the compromised router can be used as a launching pad for attacks on other connected devices.

REFERENCES

• https://github.com/Madgeaaaaa/MY_VULN_2/blob/main/D-Link/vuln-2/DIR-803%20Authentication%20Bypass.md
• https://vuldb.com/?id.335869
• https://nvd.nist.gov/vuln/detail/CVE-2025-14528