CVE-2021-40496 Explained : Impact and Mitigation

This CVE-2021-40496 article provides insights into a vulnerability in SAP NetWeaver AS ABAP and ABAP Platform.

Understanding CVE-2021-40496

SAP NetWeaver AS ABAP and ABAP Platform versions 700 to 785 are affected by a vulnerability in the Internet Communication framework.

What is CVE-2021-40496?

The vulnerability allows an attacker with logon functionality to exploit the authentication function using POST requests, potentially exposing sensitive data over the network.

The Impact of CVE-2021-40496

An attacker can execute repeated initial commands through a GET request, leading to the exposure of system details and other confidential information.

Technical Details of CVE-2021-40496

This section covers the technical aspects of the vulnerability.

Vulnerability Description

The flaw in the SAP Internet Communication framework allows for unauthorized data exposure by manipulating form fields and POST requests.

Affected Systems and Versions

SAP NetWeaver AS ABAP and ABAP Platform versions < 700 to < 785 are impacted by this vulnerability.

Exploitation Mechanism

Attackers use POST requests to repeat commands initially performed through a logon session with GET requests, potentially leaking system details.

Mitigation and Prevention

Learn how to mitigate the risks associated with CVE-2021-40496.

Immediate Steps to Take

Apply security patches provided by SAP promptly.
Implement network security mechanisms to restrict unauthorized access.

Long-Term Security Practices

Regularly monitor and audit system logs for any suspicious activities.
Train staff on recognizing phishing attempts and social engineering tactics.

Patching and Updates

Stay informed about security updates released by SAP for the affected versions to prevent exploitation of this vulnerability.