CVE-2022-36464 : Exploit Details and Defense Strategies

TOTOLINK A3700R V9.1.2u.6134_B20201202 was discovered to contain a stack overflow vulnerability via the sPort parameter in the function setIpPortFilterRules.

Understanding CVE-2022-36464

This CVE identifies a stack overflow vulnerability in the TOTOLINK A3700R router which can be exploited via the sPort parameter.

What is CVE-2022-36464?

The CVE-2022-36464 vulnerability affects TOTOLINK A3700R V9.1.2u.6134_B20201202 due to a stack overflow triggered by malicious input through the sPort parameter in setIpPortFilterRules function.

The Impact of CVE-2022-36464

The stack overflow vulnerability in TOTOLINK A3700R can allow an attacker to execute arbitrary code or crash the device, potentially leading to a denial of service (DoS) or remote code execution (RCE) attack.

Technical Details of CVE-2022-36464

This section provides deeper insights into the vulnerability, affected systems, and exploitation mechanisms.

Vulnerability Description

The vulnerability arises from improper input validation of the sPort parameter, leading to a stack overflow condition that can be exploited by attackers.

Affected Systems and Versions

TOTOLINK A3700R V9.1.2u.6134_B20201202 is confirmed to be affected by CVE-2022-36464, although other versions may also be vulnerable.

Exploitation Mechanism

Attackers can exploit this vulnerability by sending specially crafted input to the sPort parameter, causing a stack overflow and potentially gaining unauthorized access to the device.

Mitigation and Prevention

To protect systems from CVE-2022-36464, immediate actions and long-term security practices are essential.

Immediate Steps to Take

Users are advised to update the firmware of TOTOLINK A3700R to the latest version provided by the vendor and monitor network traffic for any signs of unauthorized access.

Long-Term Security Practices

Implementing network segmentation, using intrusion detection systems, and practicing the principle of least privilege can enhance overall security posture.

Patching and Updates

Regularly check for security updates and patches released by TOTOLINK, ensuring that the router firmware is always up to date to mitigate known vulnerabilities.