CVE-2021-41243 : Security Advisory and Response

A vulnerability in the management system of baserCMS allows for potential Zip Slip and OS Command Injection due to crafted zip file uploads. Immediate patching is advised.

Understanding CVE-2021-41243

This CVE involves a critical vulnerability that could lead to arbitrary command execution on the host operating system.

What is CVE-2021-41243?

The CVE-2021-41243 vulnerability in baserCMS pertains to a Zip Slip issue and OS Command Injection in the management system, enabling attackers to run arbitrary commands.

The Impact of CVE-2021-41243

The vulnerability has a CVSS base score of 9.1, indicating a critical severity level. It poses a high risk to confidentiality, allowing unauthorized access to sensitive data.

Technical Details of CVE-2021-41243

The technical aspects provide insight into the vulnerability, affected systems, and the mechanism of exploitation.

Vulnerability Description

The vulnerability allows users to upload malicious zip files to execute unauthorized commands on the host operating system, posing a severe security risk to the platform.

Affected Systems and Versions

Product: basercms
Vendor: baserproject
Versions Affected: < 4.5.4

Exploitation Mechanism

Attackers with upload permissions can exploit the vulnerability by uploading manipulated zip files to execute commands.

Mitigation and Prevention

Immediate action is crucial to mitigate the risk and prevent potential exploitation.

Immediate Steps to Take

Update baserCMS to version 4.5.4 or above to address the vulnerability.
Restrict file upload permissions to trusted users only.
Monitor system logs for any suspicious activities related to file uploads.

Long-Term Security Practices

Educate users about safe file handling practices to prevent similar vulnerabilities.
Regularly audit and update security protocols to address emerging threats.

Patching and Updates

Ensure regular updates and patches are applied to the baserCMS system to address security vulnerabilities effectively.