CVE-2020-11096 Explained : Impact and Mitigation

CVE-2020-11096 is a vulnerability in FreeRDP that allows for a global out-of-bounds read in the update_read_cache_bitmap_v3_order function.

Understanding CVE-2020-11096

This CVE identifies a security issue in FreeRDP that could potentially lead to information disclosure.

What is CVE-2020-11096?

CVE-2020-11096 is a global out-of-bounds read vulnerability in the update_read_cache_bitmap_v3_order function in FreeRDP before version 2.1.2.

The Impact of CVE-2020-11096

This vulnerability could be exploited by an attacker to read beyond the boundaries of allocated memory, potentially leading to the disclosure of sensitive information.

Technical Details of CVE-2020-11096

CVE-2020-11096 involves the following technical aspects:

Vulnerability Description

Global out-of-bounds read in the update_read_cache_bitmap_v3_order function in FreeRDP.

Affected Systems and Versions

Vendor: FreeRDP
Product: FreeRDP
Versions Affected: < 2.1.2

Exploitation Mechanism

Attack Vector: Network
Attack Complexity: High
Privileges Required: Low
User Interaction: None
Scope: Changed
Confidentiality Impact: None
Integrity Impact: Low
Availability Impact: None
Base Score: 3.5 (Low)

Mitigation and Prevention

To address CVE-2020-11096, consider the following mitigation strategies:

Immediate Steps to Take

Upgrade FreeRDP to version 2.1.2 or later.
Disable bitmap cache with the -bitmap-cache option as a workaround.

Long-Term Security Practices

Regularly update software and apply security patches.
Implement network segmentation and access controls to limit exposure.

Patching and Updates

Refer to vendor advisories and security announcements for patch availability and installation instructions.