Overview

The vulnerability in question, CVE-2024-53621, is a serious buffer overflow flaw found in the formSetCfm() function of Tenda AC1206 1200M 11ac US_AC1206V1.0RTL_V15.03.06.23_multi_TD01. It is of significant concern as it allows malicious actors to cause a Denial of Service (DoS) attack on systems using a carefully crafted POST request.

Vulnerability Summary

CVE ID: CVE-2024-53621
Severity: High (7.5 CVSS Score)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Denial of Service, potential system compromise, and data leakage

Affected Products

Product | Affected Versions

Tenda AC1206 1200M 11ac | US_AC1206V1.0RTL_V15.03.06.23_multi_TD01

How the Exploit Works

The exploit works by an attacker crafting a malicious POST request targeting the formSetCfm() function in the Tenda AC1206 router. This causes a buffer overflow, which allows the attacker to cause a Denial of Service attack, potentially compromise the system and leak data.

Conceptual Example Code

Below is a conceptual example of how the vulnerability might be exploited. This is a sample HTTP POST request:

POST /formSetCfm HTTP/1.1
Host: target.example.com
Content-Type: application/x-www-form-urlencoded
data=AAAAAAAAAAAAAAAAAAAAAAAAAAAAA... [Continue until buffer overflow is triggered]

Please note that the example above is a conceptual representation and may not work in a real-world scenario without appropriate modifications.

Mitigation Guidance

To mitigate this vulnerability, users are recommended to apply the patch provided by the vendor. If a patch is not available, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can serve as a temporary mitigation measure.