CVE-2021-27618 : Security Advisory and Response

A vulnerability in the Integration Builder Framework of SAP Process Integration versions 7.10 to 7.50 allows attackers to upload malicious files, potentially causing denial of service.

Understanding CVE-2021-27618

This CVE identifies a security flaw in SAP Process Integration's Integration Builder Framework that impacts versions ranging from 7.10 to 7.50.

What is CVE-2021-27618?

The Integration Builder Framework in SAP Process Integration fails to validate the file type extension when files are uploaded from a local source. Attackers could exploit this weakness by uploading crafted malicious files, leading to a denial of service and affecting application availability.

The Impact of CVE-2021-27618

With a CVSS base score of 4.9 (Medium severity), this vulnerability poses a risk to the availability of systems using the affected SAP Process Integration versions (7.10 to 7.50). An attacker with high privileges could potentially exploit this flaw through a network-based attack vector, resulting in a significant impact on system availability.

Technical Details of CVE-2021-27618

This section dives deeper into the technical aspects of the CVE.

Vulnerability Description

The vulnerability arises from the inadequate file type extension validation in the Integration Builder Framework, enabling attackers to upload malicious files.

Affected Systems and Versions

SAP Process Integration versions affected by this vulnerability include 7.10, 7.11, 7.20, 7.30, 7.31, 7.40, and 7.50.

Exploitation Mechanism

By crafting a malicious file and uploading it through the application, threat actors can exploit this vulnerability, potentially triggering a denial of service attack.

Mitigation and Prevention

To address CVE-2021-27618, proactive measures and immediate actions are essential.

Immediate Steps to Take

Organizations should restrict file uploads, implement proper input validation, and deploy relevant security patches provided by SAP to mitigate the risk of exploitation.

Long-Term Security Practices

Incorporating secure coding practices, regular security training for developers and users, and maintaining up-to-date security configurations can help in preventing similar vulnerabilities in the future.

Patching and Updates

It is crucial for organizations to keep their systems up-to-date with the latest security patches and updates released by SAP to address this vulnerability effectively.