CVE-2020-11039 : Exploit Details and Defense Strategies

This CVE involves an Integer Overflow vulnerability in FreeRDP that allows arbitrary memory read and write due to length check integer overflows.

Understanding CVE-2020-11039

What is CVE-2020-11039?

In FreeRDP versions less than or equal to 2.0.0, a manipulated server with USB redirection enabled can lead to arbitrary memory manipulation through integer overflows in length checks.

The Impact of CVE-2020-11039

This vulnerability can result in the unauthorized reading and writing of memory, potentially leading to security breaches and data compromise.

Technical Details of CVE-2020-11039

Vulnerability Description

The issue arises from integer overflows in length checks when using a compromised server with USB redirection enabled in FreeRDP.

Affected Systems and Versions

Vendor: FreeRDP
Product: FreeRDP
Affected Versions: <= 2.0.0

Exploitation Mechanism

The vulnerability can be exploited by manipulating a server with USB redirection enabled to trigger integer overflows and gain unauthorized memory access.

Mitigation and Prevention

Immediate Steps to Take

Update FreeRDP to version 2.1.0 or later to patch the vulnerability.
Disable USB redirection if not essential for operations.

Long-Term Security Practices

Regularly update software and systems to mitigate known vulnerabilities.
Implement network segmentation to limit the impact of potential breaches.

Patching and Updates

Apply security patches promptly to address known vulnerabilities and enhance system security.