CVE-2021-43037 : Vulnerability Insights and Analysis

A security vulnerability in Kaseya Unitrends Backup Appliance allowed privilege escalation due to DLL injection and binary planting.

Understanding CVE-2021-43037

An issue in Kaseya Unitrends Backup Appliance before version 10.5.5 led to privilege escalation through insecure default permissions.

What is CVE-2021-43037?

The vulnerability in the Unitrends Windows agent enabled DLL injection and binary planting, permitting unprivileged user privilege escalation to SYSTEM.

The Impact of CVE-2021-43037

The vulnerability provided a gateway for attackers to elevate privileges, potentially compromising the entire system.

Technical Details of CVE-2021-43037

The technical aspects of the vulnerability are as follows:

Vulnerability Description

DLL injection and binary planting in Kaseya Unitrends Backup Appliance before 10.5.5

Affected Systems and Versions

Vendor: n/a
Product: n/a
Affected Versions: All versions prior to 10.5.5

Exploitation Mechanism

Insecure default permissions in the Unitrends Windows agent facilitated privilege escalation.

Mitigation and Prevention

Steps to mitigate and prevent exploitation:

Immediate Steps to Take

Update Kaseya Unitrends Backup Appliance to version 10.5.5 or higher
Restrict access permissions to reduce attack surface

Long-Term Security Practices

Conduct regular security audits and vulnerability assessments
Implement the principle of least privilege to limit system access

Patching and Updates

Apply security patches promptly and consistently to address known vulnerabilities