Stack-Based Buffer Overflow in Edimax EW-7478APC Firmware

Impact Analysis

This vulnerability can have severe impacts including unauthorized remote code execution, denial of service, and full compromise of the affected device. Because it allows a stack-based buffer overflow via remote attack, an attacker could gain control over the device, disrupt its normal operation, or use it as a foothold to attack other systems on the network.

The CVSS scores indicate a high severity with potential impacts on confidentiality, integrity, and availability, meaning sensitive data could be exposed or altered, and services could be interrupted.

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Executive Summary

This vulnerability exists in the Edimax EW-7478APC device, specifically in the function formL2TPSetup within the POST Request Handler component. It involves manipulation of the L2TPUserName argument, which leads to a stack-based buffer overflow. This type of vulnerability allows an attacker to overwrite parts of the memory stack, potentially enabling remote code execution or causing the device to crash.

The vulnerability can be exploited remotely, meaning an attacker does not need physical access to the device to launch an attack. The exploit has been publicly disclosed, increasing the risk of it being used maliciously.

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