CVE-2019-14743 : Security Advisory and Response

Valve Steam Client for Windows before 2019-08-07 has a vulnerability that could allow local users to gain elevated privileges.

Understanding CVE-2019-14743

This CVE identifies a security issue in the Valve Steam Client for Windows.

What is CVE-2019-14743?

The Valve Steam Client for Windows had a specific permission setting in the registry key, potentially enabling local users to acquire elevated access.

The Impact of CVE-2019-14743

The vulnerability could allow local users to gain NT AUTHORITY\SYSTEM access, potentially leading to unauthorized system control.

Technical Details of CVE-2019-14743

This section provides more technical insights into the CVE.

Vulnerability Description

The Valve Steam Client for Windows had a permission misconfiguration in the registry key, granting excessive privileges to the Users group.

Affected Systems and Versions

Affected Product: Valve Steam Client for Windows
Affected Version: Before 2019-08-07

Exploitation Mechanism

The vulnerability could be exploited by local users to escalate their privileges and potentially gain control over the system.

Mitigation and Prevention

Protecting systems from CVE-2019-14743 requires specific actions.

Immediate Steps to Take

Monitor and restrict access to the affected registry key.
Implement the principle of least privilege for user permissions.
Regularly update and patch the Valve Steam Client.

Long-Term Security Practices

Conduct regular security audits and vulnerability assessments.
Educate users on safe computing practices and the risks of elevated privileges.

Patching and Updates

Apply security patches and updates provided by Valve to address the vulnerability.