CVE-2018-20753 : Security Advisory and Response

Kaseya VSA RMM before version R9.3 9.3.0.35, R9.4 before 9.4.0.36, and R9.5 before 9.5.0.5 has a security flaw that allows unauthorized remote attackers to run PowerShell payloads on managed devices.

Understanding CVE-2018-20753

Kaseya VSA RMM vulnerability allowing unauthorized remote attackers to execute PowerShell payloads.

What is CVE-2018-20753?

This CVE refers to a security vulnerability in Kaseya VSA RMM versions prior to R9.3 9.3.0.35, R9.4 before 9.4.0.36, and R9.5 before 9.5.0.5. It enables unprivileged remote attackers to run PowerShell payloads on all devices managed by the software.

The Impact of CVE-2018-20753

In January 2018, malicious actors actively exploited this vulnerability, posing a significant threat to the security of affected systems.

Technical Details of CVE-2018-20753

Kaseya VSA RMM vulnerability technical specifics.

Vulnerability Description

The flaw allows unauthorized remote attackers to execute PowerShell payloads on all devices managed by Kaseya VSA RMM versions prior to specified releases.

Affected Systems and Versions

Kaseya VSA RMM versions before R9.3 9.3.0.35
Kaseya VSA RMM versions before R9.4 9.4.0.36
Kaseya VSA RMM versions before R9.5 9.5.0.5

Exploitation Mechanism

Attackers can exploit this vulnerability remotely to execute PowerShell payloads on all devices managed by the affected software.

Mitigation and Prevention

Protecting systems from CVE-2018-20753.

Immediate Steps to Take

Update Kaseya VSA RMM to versions R9.3 9.3.0.35, R9.4 9.4.0.36, or R9.5 9.5.0.5 to mitigate the vulnerability.
Monitor for any unauthorized PowerShell activity on managed devices.

Long-Term Security Practices

Regularly update and patch software to prevent known vulnerabilities.
Implement network segmentation to limit the impact of potential attacks.

Patching and Updates

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