CVE-2018-10381 Explained : Impact and Mitigation

TunnelBear 3.2.0.6 for Windows has a SYSTEM privilege escalation vulnerability that allows attackers to execute code as the SYSTEM user.

Understanding CVE-2018-10381

This CVE identifies a privilege escalation vulnerability in TunnelBear 3.2.0.6 for Windows.

What is CVE-2018-10381?

The vulnerability in the "TunnelBearMaintenance" service allows attackers to gain control of the OpenVPN command line and execute code as the SYSTEM user.

The Impact of CVE-2018-10381

Attackers can exploit this vulnerability to escalate privileges and potentially take control of affected systems.

Technical Details of CVE-2018-10381

This section provides more technical insights into the vulnerability.

Vulnerability Description

The vulnerability arises from the NetNamedPipe endpoint created by the "TunnelBearMaintenance" service, enabling unauthorized applications to connect and utilize exposed methods.

Affected Systems and Versions

Product: TunnelBear 3.2.0.6 for Windows
Vendor: TunnelBear
Versions: All versions are affected

Exploitation Mechanism

Attackers can leverage the "OpenVPNConnect" method with a server list argument to control the OpenVPN command line.
By specifying a dynamic library plugin, attackers can execute code as the SYSTEM user during new VPN connection attempts.

Mitigation and Prevention

Protecting systems from this vulnerability requires immediate actions and long-term security practices.

Immediate Steps to Take

Disable or uninstall the vulnerable software version.
Monitor network traffic for any suspicious activity.

Long-Term Security Practices

Regularly update software and apply security patches.
Implement the principle of least privilege to restrict user access.

Patching and Updates

Check for security updates from TunnelBear and apply them promptly to mitigate the vulnerability.