CVE-2023-37927 : Vulnerability Insights and Analysis

A detailed analysis of the CVE-2023-37927 vulnerability affecting Zyxel NAS326 and NAS542 firmware.

Understanding CVE-2023-37927

This section provides insights into the nature and impact of CVE-2023-37927.

What is CVE-2023-37927?

The CVE-2023-37927 vulnerability involves the improper neutralization of special elements in the CGI program of Zyxel NAS326 firmware version V5.21(AAZF.14)C0 and NAS542 firmware version V5.21(ABAG.11)C0. This flaw could enable an authenticated attacker to execute OS commands by exploiting a crafted URL.

The Impact of CVE-2023-37927

The vulnerability poses a high risk, with a CVSS base score of 8.8 (High severity). It can lead to unauthorized execution of OS commands via a network attack, impacting confidentiality, integrity, and availability.

Technical Details of CVE-2023-37927

Explore the technical aspects of CVE-2023-37927 and its implications.

Vulnerability Description

The vulnerability arises due to the failure to properly sanitize input in the CGI program, allowing attackers to execute malicious OS commands.

Affected Systems and Versions

Zyxel NAS326 firmware version V5.21(AAZF.14)C0 and NAS542 firmware version V5.21(ABAG.11)C0 are impacted by this vulnerability.

Exploitation Mechanism

Attackers with authenticated access can exploit the vulnerability by sending a specifically crafted URL to the affected devices, enabling them to execute unauthorized OS commands remotely.

Mitigation and Prevention

Discover the steps to mitigate the risks associated with CVE-2023-37927.

Immediate Steps to Take

Update the affected firmware versions to address the vulnerability immediately.
Monitor network traffic for any suspicious activities indicative of exploitation attempts.

Long-Term Security Practices

Implement strict input validation mechanisms in CGI programs to prevent command injections.
Conduct regular security audits and penetration tests to identify and remediate similar vulnerabilities.

Patching and Updates

Stay informed about security advisories from Zyxel and apply patches promptly to secure your NAS devices.