CVE-2020-13551 Explained : Impact and Mitigation

An exploitable local privilege elevation vulnerability exists in the file system permissions of Advantech WebAccess/SCADA 9.0.1 installation. In privilege escalation via PostgreSQL executable, an attacker can either replace binary or loaded modules to execute code with NT SYSTEM privilege.

Understanding CVE-2020-13551

This CVE involves a local privilege elevation vulnerability in Advantech WebAccess/SCADA 9.0.1.

What is CVE-2020-13551?

CVE-2020-13551 is a vulnerability that allows an attacker to elevate privileges locally in the Advantech WebAccess/SCADA 9.0.1 system.

The Impact of CVE-2020-13551

The vulnerability has a CVSS base score of 8.8, indicating a high severity level with significant impacts on confidentiality, integrity, and availability of the system.

Technical Details of CVE-2020-13551

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The vulnerability arises from incorrect file system permissions in the Advantech WebAccess/SCADA 9.0.1 installation, enabling privilege escalation via PostgreSQL executable.

Affected Systems and Versions

Product: Advantech
Version: Advantech WebAccess/SCADA 9.0.1

Exploitation Mechanism

Attack Complexity: Low
Attack Vector: Local
Privileges Required: Low
User Interaction: None
Scope: Changed
Impact: High on Availability, Confidentiality, and Integrity

Mitigation and Prevention

Protect your system from CVE-2020-13551 with the following steps:

Immediate Steps to Take

Apply vendor-supplied patches promptly.
Restrict access to vulnerable systems.
Monitor for any unauthorized system changes.

Long-Term Security Practices

Regularly update and patch software and systems.
Implement the principle of least privilege to limit access rights.
Conduct security training and awareness programs for employees.

Patching and Updates

Ensure timely installation of security patches and updates to mitigate the risk of exploitation.