CVE-2020-11058 : Security Advisory and Response

CVE-2020-11058, assigned by GitHub_M, pertains to an improper restriction of operations within the bounds of a memory buffer in FreeRDP.

Understanding CVE-2020-11058

What is CVE-2020-11058?

In FreeRDP versions after 1.1 and before 2.0.0, a vulnerability allowed a stream out-of-bounds seek in rdp_read_font_capability_set, potentially leading to a later out-of-bounds read. This flaw could be exploited by a manipulated client or server to force a disconnect due to an invalid data read.

The Impact of CVE-2020-11058

The impact of this vulnerability is rated as LOW with a base score of 2.2. It could result in a denial of service due to an out-of-bounds read.

Technical Details of CVE-2020-11058

Vulnerability Description

The vulnerability in FreeRDP could allow an out-of-bounds seek in rdp_read_font_capability_set, leading to a subsequent out-of-bounds read.

Affected Systems and Versions

Vendor: FreeRDP
Product: FreeRDP
Versions Affected: > 1.1, < 2.0.0

Exploitation Mechanism

The vulnerability could be exploited by a manipulated client or server to trigger a disconnect by causing an invalid data read.

Mitigation and Prevention

Immediate Steps to Take

Update FreeRDP to version 2.0.0 or later to mitigate this vulnerability.
Monitor vendor advisories for any security patches or updates.

Long-Term Security Practices

Regularly update software and systems to the latest versions.
Implement network segmentation and access controls to limit exposure to potential threats.

Patching and Updates

Apply security patches provided by FreeRDP promptly to address this vulnerability.