CVE-2020-13554 : Exploit Details and Defense Strategies

An exploitable local privilege elevation vulnerability exists in the file system permissions of Advantech WebAccess/SCADA 9.0.1 installation, allowing attackers to execute code with NT SYSTEM privilege.

Understanding CVE-2020-13554

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

What is CVE-2020-13554?

CVE-2020-13554 is a security vulnerability in Advantech WebAccess/SCADA 9.0.1 that enables attackers to elevate their privileges locally.

The Impact of CVE-2020-13554

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 affected system.

Technical Details of CVE-2020-13554

This section provides more technical insights into the vulnerability.

Vulnerability Description

The vulnerability arises from incorrect file system permissions in the Advantech WebAccess/SCADA 9.0.1 installation, allowing attackers to perform privilege escalation through the webvrpcs Run Key.

Affected Systems and Versions

Product: Advantech
Version: Advantech WebAccess/SCADA 9.0.1

Exploitation Mechanism

Attackers can replace binaries or loaded modules in the installation folder of WebAccess to execute code with NT SYSTEM privilege.

Mitigation and Prevention

Protecting systems from CVE-2020-13554 requires immediate actions and long-term security practices.

Immediate Steps to Take

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

Long-Term Security Practices

Regularly review and adjust file system permissions.
Implement the principle of least privilege to limit user access.
Conduct security training to raise awareness of privilege escalation risks.

Patching and Updates

Ensure timely installation of security patches and updates to address the vulnerability effectively.