CVE-2020-4032 : Vulnerability Insights and Analysis

Integer casting vulnerability in

update_recv_secondary_order

in FreeRDP

Understanding CVE-2020-4032

What is CVE-2020-4032?

In FreeRDP before version 2.1.2, there is an integer casting vulnerability in

update_recv_secondary_order

. All clients with +glyph-cache /relax-order-checks are affected. This vulnerability has been fixed in version 2.1.2.

The Impact of CVE-2020-4032

This vulnerability could allow an attacker to execute arbitrary code or cause a denial of service on systems running the affected versions of FreeRDP.

Technical Details of CVE-2020-4032

Vulnerability Description

The vulnerability involves an integer casting issue in the

update_recv_secondary_order

function in FreeRDP.

Affected Systems and Versions

Vendor: FreeRDP
Product: FreeRDP
Versions Affected: < 2.1.2

Exploitation Mechanism

The vulnerability can be exploited by a remote attacker sending specially crafted requests to the vulnerable FreeRDP server.

Mitigation and Prevention

Immediate Steps to Take

Update FreeRDP to version 2.1.2 or later to mitigate the vulnerability.
Disable the affected functionality if upgrading is not immediately possible.

Long-Term Security Practices

Regularly update software and apply security patches promptly.
Implement network segmentation and access controls to limit exposure to potential attacks.
Conduct regular security assessments and penetration testing to identify and address vulnerabilities.

Patching and Updates

Ensure that all systems running FreeRDP are regularly patched and updated to the latest versions to prevent exploitation of known vulnerabilities.