CVE-2021-21492 : Vulnerability Insights and Analysis

This article provides an overview of CVE-2021-21492, a vulnerability impacting SAP NetWeaver AS for JAVA (HTTP Service).

Understanding CVE-2021-21492

CVE-2021-21492 is a content spoofing vulnerability affecting SAP NetWeaver Application Server Java (HTTP Service) versions 7.10 to 7.50. The vulnerability arises due to insufficient validation of logon group in URLs when directory listing is enabled.

What is CVE-2021-21492?

SAP NetWeaver AS for JAVA (HTTP Service) versions 7.10 to 7.50 are vulnerable to content spoofing due to inadequate validation of logon group in URLs with enabled directory listing.

The Impact of CVE-2021-21492

This vulnerability allows attackers to conduct content spoofing attacks, potentially leading to misleading users with false information displayed on the web pages.

Technical Details of CVE-2021-21492

The vulnerability has a CVSS v3.0 base score of 4.3, with attack complexity considered low and user interaction required. The exploit has a medium severity level.

Vulnerability Description

CVE-2021-21492 in SAP NetWeaver AS for JAVA allows for content spoofing by not adequately validating logon group in URLs.

Affected Systems and Versions

Versions 7.10, 7.11, 7.20, 7.30, 7.31, 7.40, and 7.50 of SAP NetWeaver AS for JAVA (HTTP Service) are impacted by this vulnerability.

Exploitation Mechanism

Attackers can exploit this vulnerability by manipulating logon group in URLs, especially when directory listing is enabled.

Mitigation and Prevention

To mitigate the risks associated with CVE-2021-21492, users should take immediate steps and adopt long-term security practices.

Immediate Steps to Take

Users are advised to disable directory listing where possible and apply relevant security patches provided by SAP.

Long-Term Security Practices

Maintain up-to-date security configurations, conduct regular security assessments, and educate users on safe browsing practices.

Patching and Updates

Regularly check for security updates and apply patches released by SAP to address vulnerabilities and enhance system security.