CVE-2022-44253 : Security Advisory and Response

A buffer overflow vulnerability in TOTOLINK LR350 V9.3.5u.6369_B20220309 could allow attackers to execute arbitrary code or crash the system.

Understanding CVE-2022-44253

This CVE identifies a post-authentication buffer overflow in the setDiagnosisCfg function of the TOTOLINK LR350 router.

What is CVE-2022-44253?

The vulnerability exists in the handling of the 'ip' parameter, allowing an authenticated attacker to trigger a buffer overflow, potentially leading to code execution or system crashes.

The Impact of CVE-2022-44253

Exploiting this vulnerability can result in unauthorized code execution, denial of service, or complete system compromise. Attackers could take control of the affected device.

Technical Details of CVE-2022-44253

This section provides more technical insights into the vulnerability.

Vulnerability Description

The buffer overflow occurs due to insufficient bounds checking on user-supplied input, specifically in the handling of the 'ip' parameter within the setDiagnosisCfg function.

Affected Systems and Versions

TOTOLINK LR350 V9.3.5u.6369_B20220309 is confirmed to be vulnerable to this issue.

Exploitation Mechanism

An authenticated attacker can craft a malicious request with a specially crafted 'ip' parameter to trigger the buffer overflow and potentially execute arbitrary code.

Mitigation and Prevention

Protecting systems against CVE-2022-44253 is crucial to maintaining security. Here are some key steps to consider.

Immediate Steps to Take

Apply vendor-supplied patches or updates to address the vulnerability promptly.
Restrict network access to the affected device to authorized personnel only.

Long-Term Security Practices

Regularly update firmware and software to mitigate known vulnerabilities.
Implement strong authentication mechanisms to prevent unauthorized access.

Patching and Updates

Stay informed about security advisories from TOTOLINK and apply patches as soon as they are available.