D-Link DAP-2695 Command Injection Vulnerability in Firmware Update Handler

A command injection vulnerability has been identified in the D-Link DAP-2695 access point, specifically in firmware version 2.00RC13. The issue arises in the Firmware Update Handler, particularly within the function sub_4174B0. This vulnerability allows remote attackers to inject and execute arbitrary operating system commands. The exploitation process involves manipulating network data that is improperly validated, which can then be used to execute malicious commands on the device.

Impact

Exploitation of this vulnerability allows for arbitrary command execution on the device, potentially leading to unauthorized access or control over the device's functions. Additionally, such exploitation could cause a denial-of-service condition by disrupting the device's normal operations.

Reproduction

To reproduce this vulnerability, upload a tar file containing a malicious payload to the device. The firmware update process will invoke the sub_4174B0 function, where the injected command can be executed via the system command execution function. This exploitation chain takes advantage of the lack of input validation on the network data, allowing for command injection through the firmware update mechanism.