CVE-2020-24356 Explained : Impact and Mitigation

A vulnerability in

cloudflared

versions prior to 2020.8.1 could allow local privilege escalation on Windows systems.

Understanding CVE-2020-24356

This CVE involves a local privilege escalation issue in the Cloudflare product

cloudflared

.

What is CVE-2020-24356?

cloudflared

versions before 2020.8.1 have a vulnerability that could be exploited by a malicious actor on Windows systems to execute commands as a privileged user.

The Impact of CVE-2020-24356

The vulnerability poses a medium severity risk with a CVSS base score of 6.4. It could lead to high integrity impact and low confidentiality impact.

Technical Details of CVE-2020-24356

This section provides more technical insights into the CVE.

Vulnerability Description

The issue allows local users to escalate privileges on Windows by manipulating configuration files.

Affected Systems and Versions

Product:

cloudflared

Vendor: Cloudflare
Versions Affected: All versions before 2020.8.1

Exploitation Mechanism

Attack Complexity: High
Attack Vector: Local
Privileges Required: Low
Scope: Changed
User Interaction: None
Vector String: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:L/I:H/A:N

Mitigation and Prevention

Protect your systems from this vulnerability with the following steps.

Immediate Steps to Take

Update

cloudflared

to version 2020.8.1 or later.
Monitor for any unauthorized system changes.

Long-Term Security Practices

Regularly update software and apply security patches.
Implement the principle of least privilege to restrict user access.

Patching and Updates

Cloudflare has released version 2020.8.1 to address this vulnerability. Ensure all affected systems are updated promptly.