CVE-2021-44425 : What You Need to Know

AnyDesk before 6.2.6 and 6.3.x before 6.3.3 allows unauthorized access to the local machine's tunneling protocol stack.

Understanding CVE-2021-44425

An overview of the security issue and its implications.

What is CVE-2021-44425?

AnyDesk versions prior to 6.2.6 and 6.3.x before 6.3.3 have a vulnerability that can be exploited by attackers to gain unauthorized access to the tunneling protocol stack of a local machine.

The Impact of CVE-2021-44425

The vulnerability enables unauthorized access via an open listening port created by the AnyDesk Windows client, potentially compromising the security of the local machine and any remote destination machine connected to the AnyDesk tunneled port.

Technical Details of CVE-2021-44425

Insight into the specifics of the vulnerability.

Vulnerability Description

AnyDesk prior to 6.2.6 and 6.3.x before 6.3.3 has an open listening port that can be leveraged by attackers via the tunneling feature, leading to unauthorized access to the local machine's tunneling protocol stack and connected remote machines.

Affected Systems and Versions

AnyDesk versions before 6.2.6
AnyDesk 6.3.x versions before 6.3.3

Exploitation Mechanism

Attackers target the unnecessarily open listening port created by the AnyDesk Windows client during tunneling, allowing them unauthorized entry to the local machine's tunneling protocol stack and any software on the remote machine using the tunneled port.

Mitigation and Prevention

Recommendations to address and prevent the vulnerability.

Immediate Steps to Take

Update AnyDesk to version 6.2.6 or 6.3.3 to mitigate the vulnerability.
Disable unnecessary features like tunneling if not required.

Long-Term Security Practices

Regularly monitor network traffic for suspicious activities.
Implement strong firewall rules to restrict unauthorized access.

Patching and Updates

Ensure timely installation of security patches provided by AnyDesk to address known vulnerabilities.