CVE-2021-42123 : Security Advisory and Response

TopEase platform by Business-DNA Solutions GmbH is vulnerable to unrestricted file upload, allowing authenticated remote attackers to upload malicious files.

Understanding CVE-2021-42123

This CVE describes a security vulnerability in the TopEase platform that could lead to arbitrary file uploads.

What is CVE-2021-42123?

An unrestricted file upload issue in TopEase platform versions <= 7.1.27 enables authenticated attackers with upload privileges to upload files of any type, facilitating client-side attacks.

The Impact of CVE-2021-42123

The vulnerability has a CVSS base score of 7.3, indicating a high severity issue affecting confidentiality, integrity, and requiring user interaction.

Technical Details of CVE-2021-42123

TopEase's vulnerability details are crucial for understanding its implications and mitigation strategies.

Vulnerability Description

Unrestricted file upload on the TopEase platform allows attackers to upload malicious files, posing a significant security risk.

Affected Systems and Versions

Product: TopEase
Vendor: Business-DNA Solutions GmbH
Versions Affected: <= 7.1.27 (Custom version)

Exploitation Mechanism

The vulnerability allows authenticated remote attackers with upload privileges to exploit the file upload function and upload files of any type.

Mitigation and Prevention

Addressing CVE-2021-42123 requires immediate actions and long-term security practices.

Immediate Steps to Take

Apply security patches provided by the vendor promptly.
Restrict access to the file upload feature to trusted users only.
Monitor file uploads for suspicious activities.

Long-Term Security Practices

Regularly update and patch software to prevent known vulnerabilities.
Conduct security training to educate users on safe practices.

Patching and Updates

Ensure that TopEase platform is regularly updated with the latest security patches and versions to mitigate the unrestricted file upload risk.