CVE-2023-50919 : Exploit Details and Defense Strategies

This article provides detailed information about CVE-2023-50919, a security vulnerability found in GL.iNet devices before version 4.5.0 that allows for an NGINX authentication bypass via Lua string pattern matching.

Understanding CVE-2023-50919

In this section, we will delve into the nature of CVE-2023-50919 and its implications.

What is CVE-2023-50919?

CVE-2023-50919 is a vulnerability discovered on GL.iNet devices prior to version 4.5.0, enabling an authentication bypass through Lua string pattern matching. The impacted devices include A1300 4.4.6, AX1800 4.4.6, AXT1800 4.4.6, MT3000 4.4.6, MT2500 4.4.6, MT6000 4.5.0, MT1300 4.3.7, MT300N-V2 4.3.7, AR750S 4.3.7, AR750 4.3.7, AR300M 4.3.7, and B1300 4.3.7.

The Impact of CVE-2023-50919

This vulnerability poses a significant security risk as it allows unauthorized access to the affected GL.iNet devices, potentially leading to unauthorized activities and data breaches.

Technical Details of CVE-2023-50919

In this section, we will explore the technical aspects of CVE-2023-50919.

Vulnerability Description

The vulnerability stems from an authentication bypass method using Lua string pattern matching, which can be exploited by malicious actors to circumvent authentication mechanisms on the vulnerable GL.iNet devices.

Affected Systems and Versions

GL.iNet devices running firmware versions before 4.5.0, specifically models A1300, AX1800, AXT1800, MT3000, MT2500, MT6000, MT1300, MT300N-V2, AR750S, AR750, AR300M, and B1300, are susceptible to this vulnerability.

Exploitation Mechanism

By leveraging Lua string pattern matching, threat actors can bypass NGINX authentication on the affected GL.iNet devices, gaining unauthorized access.

Mitigation and Prevention

Protecting systems from CVE-2023-50919 is crucial to maintaining cybersecurity. Here are the recommended steps to mitigate and prevent exploitation.

Immediate Steps to Take

Update GL.iNet devices to version 4.5.0 or newer to eliminate the vulnerability.
Monitor network traffic for any suspicious activity that could indicate exploitation of the vulnerability.

Long-Term Security Practices

Regularly update firmware and software to patch security vulnerabilities and enhance system defenses.
Implement strong access control measures and authentication mechanisms to reduce the risk of unauthorized access.

Patching and Updates

Stay informed about security updates and patches released by GL.iNet to address vulnerabilities like CVE-2023-50919. Promptly apply these patches to secure your devices and networks.