CVE-2021-27610 : What You Need to Know

SAP NetWeaver ABAP Server and ABAP Platform versions 700, 701, 702, 731, 740, 750, 751, 752, 753, 754, 755, and 804 have a vulnerability that does not create information about internal and external RFC users in a consistent format, leading to improper authentication.

Understanding CVE-2021-27610

This CVE affects SAP NetWeaver AS ABAP and ABAP Platform, impacting versions below 804.

What is CVE-2021-27610?

CVE-2021-27610 is a critical vulnerability in SAP NetWeaver AS ABAP and ABAP Platform which could be exploited by malicious users to gain unauthorized access.

The Impact of CVE-2021-27610

This vulnerability has a base score of 9.0 and a critical severity level according to the CVSS v3.0 metrics. It poses a high risk of improper authentication and potential unauthorized access to the system.

Technical Details of CVE-2021-27610

The vulnerability lies in the inconsistency of creating information about internal and external RFC users, opening the door to unauthorized access.

Vulnerability Description

SAP NetWeaver ABAP Server and ABAP Platform versions do not maintain consistent information about RFC users, leading to improper authentication.

Affected Systems and Versions

SAP NetWeaver AS ABAP and ABAP Platform versions <700, <701, <702, <731, <740, <750, <751, <752, <753, <754, <755, <804.

Exploitation Mechanism

Malicious users can exploit this vulnerability to obtain illegitimate access to the system due to the lack of consistent RFC user information.

Mitigation and Prevention

To protect your systems, immediate steps should be taken, along with long-term security practices.

Immediate Steps to Take

Apply relevant security patches from SAP to address this vulnerability.
Monitor system logs and user activities for any suspicious behavior.

Long-Term Security Practices

Regularly update SAP systems and apply patches as soon as they are released.
Conduct security assessments and audits periodically to identify and address any vulnerabilities.

Patching and Updates

Stay informed about security updates and patches released by SAP for SAP NetWeaver ABAP Server and ABAP Platform to ensure the latest protection.