TOTOLINK A3002R Buffer Overflow Vulnerability in HTTP POST Request Handler

A critical buffer overflow vulnerability has been identified in the TOTOLINK A3002R router, specifically in version 4.0.0-B20230531.1404. The issue arises within the HTTP POST request handler, in the file '/boafrm/formMultiAP'. The vulnerability is triggered by manipulating the 'submit-url' argument, leading to a buffer overflow that can be exploited remotely. This flaw has been publicly disclosed and is associated with a proof-of-concept exploit.

Impact

Exploitation of this vulnerability causes a buffer overflow, which can lead to arbitrary code execution or a denial-of-service condition on the device.

Reproduction

To reproduce this vulnerability, send a malicious HTTP POST request to the '/boafrm/formMultiAP' endpoint, including a crafted 'submit-url' argument that exploits the buffer overflow condition.