CVE-2022-27502 : Vulnerability Insights and Analysis

RealVNC VNC Server 6.9.0 through 5.1.0 for Windows has a vulnerability that allows local privilege escalation. Learn more about the impact, technical details, and mitigation steps.

Understanding CVE-2022-27502

This CVE describes a security flaw in RealVNC VNC Server versions 6.9.0 through 5.1.0 for Windows, which could be exploited to execute malicious operations with elevated privileges.

What is CVE-2022-27502?

The CVE-2022-27502 vulnerability in RealVNC VNC Server for Windows permits local attackers to escalate their privileges by using an installer repair operation to run %TEMP% files as SYSTEM.

The Impact of CVE-2022-27502

This vulnerability could be exploited by local attackers to gain elevated privileges on the target system, potentially leading to further malicious actions and compromise of sensitive information.

Technical Details of CVE-2022-27502

Below are the technical details related to CVE-2022-27502:

Vulnerability Description

The vulnerability arises from the way the installer repair operation handles and executes %TEMP% files, allowing local attackers to achieve privilege escalation.

Affected Systems and Versions

RealVNC VNC Server versions 6.9.0 through 5.1.0 for Windows are impacted by this vulnerability, potentially exposing systems running these versions to exploitation.

Exploitation Mechanism

Attackers with local access to the target system can exploit this vulnerability by leveraging the installer repair operation to execute malicious operations, thereby gaining elevated privileges.

Mitigation and Prevention

To mitigate the risks associated with CVE-2022-27502, consider the following steps:

Immediate Steps to Take

Disable or restrict access to the affected VNC Server until a patch is available.
Monitor for any suspicious activity on the system that could indicate exploitation attempts.

Long-Term Security Practices

Regularly update the VNC Server software to apply security patches and bug fixes promptly.
Implement the principle of least privilege to limit the capabilities of potential attackers in case of a successful exploitation.

Patching and Updates

Keep an eye on RealVNC's official website and security advisories for the release of a patch addressing CVE-2022-27502. Apply the patch as soon as it becomes available to secure your system against this vulnerability.