CVE-2020-26762 : Vulnerability Insights and Analysis

A stack-based buffer-overflow vulnerability exists in Edimax IP-Camera IC-3116W (v3.06) and IC-3140W (v3.07), allowing remote code execution by an unauthorized attacker through a crafted GET request.

Understanding CVE-2020-26762

This CVE identifies a critical security issue in Edimax IP-Camera models IC-3116W and IC-3140W.

What is CVE-2020-26762?

The vulnerability enables an unauthenticated attacker to execute remote code due to a stack-based buffer overflow in binary ipcam_cgi, triggered by a specific GET request.

The Impact of CVE-2020-26762

The security flaw permits unauthorized individuals to execute malicious code on affected devices, compromising their integrity and potentially leading to further exploitation.

Technical Details of CVE-2020-26762

This section delves into the technical aspects of the vulnerability.

Vulnerability Description

The buffer overflow occurs in the function doGetSysteminfo() of the ipcam_cgi binary, resulting from a missing type check. The issue affects Edimax IP-Camera models IC-3116W (v3.06) and IC-3140W (v3.07).

Affected Systems and Versions

Edimax IP-Camera IC-3116W (v3.06)
Edimax IP-Camera IC-3140W (v3.07)

Exploitation Mechanism

The vulnerability is exploited by sending a specifically crafted GET request to the affected devices, triggering the buffer overflow and allowing the attacker to execute arbitrary code remotely.

Mitigation and Prevention

Protecting systems from CVE-2020-26762 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update affected devices to the patched version IC-3116W v3.08 to mitigate the vulnerability.
Implement network segmentation to limit exposure of vulnerable devices.
Monitor network traffic for any suspicious activity that may indicate exploitation attempts.

Long-Term Security Practices

Regularly update firmware and software to address security vulnerabilities promptly.
Conduct security assessments and penetration testing to identify and remediate potential weaknesses.

Patching and Updates

Ensure timely installation of security patches and updates provided by Edimax to address CVE-2020-26762 and other known vulnerabilities.