CVE-2023-40567 : Vulnerability Insights and Analysis

This article provides detailed information about CVE-2023-40567, a vulnerability leading to an Out-Of-Bounds Write in FreeRDP.

Understanding CVE-2023-40567

CVE-2023-40567 is an Out-Of-Bounds Write vulnerability found in FreeRDP, a free implementation of the Remote Desktop Protocol (RDP) under the Apache license.

What is CVE-2023-40567?

FreeRDP versions prior to 2.11.0 and between >= 3.0.0-beta1 and < 3.0.0-beta3 are affected by an Out-Of-Bounds Write vulnerability in the

clear_decompress_bands_data

function due to lack of offset validation.

The Impact of CVE-2023-40567

Exploitation of this vulnerability could result in an Out-Of-Bounds Write scenario, potentially leading to unauthorized access or denial of service.

Technical Details of CVE-2023-40567

The following details outline the technical aspects of the CVE-2023-40567 vulnerability in FreeRDP:

Vulnerability Description

Abuse of the

clear_decompress_bands_data

function vulnerability could allow attackers to execute malicious code beyond the boundaries of the intended memory buffer.

Affected Systems and Versions

Vendor: FreeRDP
Affected Product: FreeRDP
Vulnerable Versions:
Version < 2.11.0
Version >= 3.0.0-beta1, < 3.0.0-beta3

Exploitation Mechanism

Attackers can exploit this vulnerability by manipulating the input passed to the vulnerable function, triggering an Out-Of-Bounds Write behavior.

Mitigation and Prevention

To address CVE-2023-40567 and enhance system security, consider the following mitigation strategies:

Immediate Steps to Take

Upgrade to FreeRDP version 2.11.0 or newer
Specifically, for users on versions >= 3.0.0-beta1, upgrade to version 3.0.0-beta3 or higher

Long-Term Security Practices

Regularly update software to the latest versions
Implement secure coding practices and conduct regular security audits

Patching and Updates

Stay informed about security advisories and promptly apply patches released by FreeRDP to address known vulnerabilities.