CVE-2020-11099 : Exploit Details and Defense Strategies

CVE-2020-11099 is an out-of-bounds read vulnerability in FreeRDP that can lead to potential security risks. Learn about the impact, technical details, and mitigation steps associated with this CVE.

Understanding CVE-2020-11099

What is CVE-2020-11099?

In FreeRDP before version 2.1.2, an out-of-bounds read vulnerability exists in license_read_new_or_upgrade_license_packet. By manipulating a license packet, attackers can trigger out-of-bounds reads in an internal buffer.

The Impact of CVE-2020-11099

This vulnerability has a CVSS base score of 3.5, indicating a low severity issue. However, it can still pose risks to confidentiality and integrity of affected systems.

Technical Details of CVE-2020-11099

Vulnerability Description

The vulnerability involves an out-of-bounds read in license_read_new_or_upgrade_license_packet in FreeRDP versions prior to 2.1.2.

Affected Systems and Versions

Vendor: FreeRDP
Product: FreeRDP
Versions Affected: < 2.1.2

Exploitation Mechanism

Attackers can exploit this vulnerability by crafting a malicious license packet, leading to out-of-bounds reads in an internal buffer.

Mitigation and Prevention

Immediate Steps to Take

Update FreeRDP to version 2.1.2 or later to mitigate the vulnerability.
Monitor vendor advisories and apply patches promptly.

Long-Term Security Practices

Regularly update software and systems to prevent known vulnerabilities.
Implement network segmentation and access controls to limit the impact of potential attacks.

Patching and Updates

Ensure timely installation of security patches and updates to address vulnerabilities like CVE-2020-11099.