CVE-2015-6428 in DPQ3925
Summary
by MITRE
Cisco DPQ3925 devices with EDVA r1 Base allow remote attackers to obtain sensitive information via a crafted HTTP request, aka Bug ID CSCuv03958.
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Analysis
by VulDB Data Team • 07/01/2022
The Cisco DPQ3925 device represents a residential gateway and cable modem that operates within consumer and small office environments, serving as a critical entry point for internet connectivity. This particular vulnerability affects devices running the EDVA r1 Base firmware version, which implements a web-based management interface for configuration and monitoring purposes. The device architecture includes a web server component that processes HTTP requests from remote clients, making it susceptible to various forms of network-based attacks targeting its administrative interface.
The technical flaw resides in the improper handling of HTTP requests within the device's web server implementation. Attackers can craft malicious HTTP requests that exploit a lack of proper input validation and access control mechanisms. When the device processes these crafted requests, it inadvertently reveals sensitive system information including configuration data, network credentials, and potentially system identifiers that should remain confidential. This vulnerability operates at the application layer and leverages weaknesses in the web server's request parsing logic without requiring authentication or prior exploitation.
The operational impact of this vulnerability extends beyond simple information disclosure, as the leaked sensitive data could enable attackers to conduct more sophisticated attacks against the affected network. The exposed information may include administrative credentials, network topology details, device configuration parameters, and other system artifacts that could facilitate further exploitation. This vulnerability particularly affects environments where the device serves as a primary internet gateway, as the information disclosure could provide attackers with pathways to compromise the entire local network infrastructure.
Security practitioners should implement network segmentation to isolate affected devices from critical network segments, ensuring that even if compromised, the attack surface remains limited. Network traffic monitoring should be enhanced to detect anomalous HTTP request patterns that might indicate exploitation attempts. Regular firmware updates should be deployed immediately upon availability, as Cisco has addressed this vulnerability in subsequent releases. The implementation of web application firewalls and access control lists can provide additional layers of protection against crafted HTTP requests targeting this specific vulnerability. This issue aligns with CWE-200, which addresses improper exposure of sensitive information, and represents a technique commonly found in the attack patterns catalogued under the MITRE ATT&CK framework for initial access and reconnaissance activities. Organizations should also consider implementing network access control measures to prevent unauthorized remote access to management interfaces and establish robust change management procedures to ensure timely patch deployment across all networked devices.