IBM terminal emulator has RCE bug

The information provided suggests that there is a Remote Code Execution (RCE) vulnerability in IBM's terminal emulation software for Windows, specifically the IBM DataPower Gateway product with the Integrated TN3270E component. This was disclosed in late 2020 and affected IBM DataPower Gateway version 7.5.1 and earlier.

The vulnerability (CVE-2020-20065) was discovered by researchers at CyberArk's Labs team. They reported that an attacker could exploit this RCE flaw by sending specially crafted TN3270E sessions to an affected IBM DataPower Gateway instance. Once the session was established, the attacker could execute arbitrary system commands on the underlying Windows operating system where the DataPower Gateway was installed.

The vulnerability existed due to insufficient input validation in the TN3270E component of the IBM DataPower Gateway. This allowed an attacker to send malicious data to the component, which would then be executed without proper validation or sanitization.

IBM released patches to address this vulnerability shortly after it was disclosed. It's important for organizations using IBM DataPower Gateway with TN3270E to apply these patches as soon as possible to mitigate the risk of potential attacks.

Additionally, it's recommended to follow best practices for securing terminal emulation software and Windows systems, such as:

1. Keeping software up-to-date with the latest patches and security updates.

2. Implementing strong access control policies and authentication mechanisms.

3. Limiting access to terminal emulation software to authorized users only.

4. Using a secure network segment for terminal services and implementing firewalls to restrict access to only trusted sources.

5. Regularly monitoring logs for suspicious activity and implementing intrusion detection systems.

By following these best practices and applying the necessary patches, organizations can help protect their systems from potential attacks exploiting known vulnerabilities like CVE-2020-20065.