CVE-2021-27601 Explained : Impact and Mitigation

SAP NetWeaver AS Java (Applications based on HTMLB for Java) is vulnerable to a Cross-Site Scripting (XSS) attack that could allow an attacker to store and execute malicious scripts. This could lead to unauthorized data access and modification.

Understanding CVE-2021-27601

This section will delve into the details of the CVE-2021-27601 vulnerability.

What is CVE-2021-27601?

CVE-2021-27601 involves a flaw in SAP NetWeaver AS Java that permits a basic-level authorized attacker to upload a malicious file to the server. Subsequently, when a user interacts with this file, it triggers a Cross-Site Scripting (XSS) vulnerability.

The Impact of CVE-2021-27601

The impact of this vulnerability is significant as it allows attackers to exploit XSS to read and modify data, although they do not have complete control over the extent of the attack.

Technical Details of CVE-2021-27601

Let's explore the technical aspects of CVE-2021-27601.

Vulnerability Description

The vulnerability in SAP NetWeaver AS Java enables attackers to leverage XSS to execute malicious scripts, potentially compromising data integrity.

Affected Systems and Versions

The affected products include SAP NetWeaver AS for Java with versions EP-BASIS 7.10, 7.11, 7.30, 7.31, 7.40, 7.50, FRAMEWORK-EXT 7.30, 7.31, 7.40, 7.50, and FRAMEWORK 7.10, 7.11.

Exploitation Mechanism

By tricking an authorized user into interacting with a malicious file, attackers can exploit the XSS vulnerability to gain access to sensitive data.

Mitigation and Prevention

To safeguard against CVE-2021-27601, immediate actions and long-term security practices are essential.

Immediate Steps to Take

Organizations should patch affected systems promptly, restrict user privileges, and monitor for suspicious activities.

Long-Term Security Practices

Implement strict input validation, conduct regular security assessments, and educate users on safe browsing habits.

Patching and Updates

Stay informed about security updates from SAP to address vulnerabilities and enhance system security.