CVE-2022-48221 Explained : Impact and Mitigation

An issue was discovered in Acuant AcuFill SDK before 10.22.02.03 where multiple MSI's get executed out of a standard-user writable directory. Through a race condition and OpLock manipulation, these files can be overwritten by a standard user, leading to full SYSTEM code execution by a standard user.

Understanding CVE-2022-48221

This section provides an insight into the vulnerability details, impact, technical aspects, and mitigation strategies.

What is CVE-2022-48221?

CVE-2022-48221 is a security vulnerability found in Acuant AcuFill SDK before version 10.22.02.03. It allows a standard user to overwrite and execute certain files from a directory, resulting in a privilege escalation to SYSTEM level.

The Impact of CVE-2022-48221

The impact of this vulnerability is critical as it enables a standard user to gain full SYSTEM code execution, potentially leading to unauthorized access and control over the affected system.

Technical Details of CVE-2022-48221

This section delves into the specifics of the vulnerability, including its description, affected systems, and exploitation mechanism.

Vulnerability Description

The vulnerability arises from the execution of multiple MSI's from a standard-user writable directory due to a race condition and OpLock manipulation. This allows the files to be overwritten and executed by a standard user, resulting in SYSTEM code execution.

Affected Systems and Versions

The affected system is Acuant AcuFill SDK before version 10.22.02.03. All prior versions are vulnerable to this privilege escalation issue.

Exploitation Mechanism

By manipulating OpLock and leveraging a race condition, a standard user can overwrite critical files in a writable directory, leading to unauthorized execution with elevated privileges.

Mitigation and Prevention

This section outlines steps to mitigate the CVE-2022-48221 vulnerability, ensuring system security and protection against potential exploits.

Immediate Steps to Take

Immediate action involves updating Acuant AcuFill SDK to version 10.22.02.03 or higher to patch the vulnerability and prevent unauthorized system access.

Long-Term Security Practices

Implement strict file system permissions, regular security audits, and user access controls to mitigate similar privilege escalation vulnerabilities in the future.

Patching and Updates

Regularly check for security updates and patches from Acuant to address emerging vulnerabilities and safeguard the system against potential threats.