CVE-2021-44123 : Security Advisory and Response

SPIP 4.0.0 is afflicted by a remote command execution vulnerability. An attacker can exploit this flaw by creating a malicious image file with a double extension, uploading it, and triggering its execution.

Understanding CVE-2021-44123

What is CVE-2021-44123?

CVE-2021-44123 is a vulnerability impacting SPIP 4.0.0, enabling remote command execution through a specially crafted image file.

The Impact of CVE-2021-44123

This vulnerability allows attackers to execute arbitrary commands on systems running the affected SPIP version, leading to potential unauthorized access and data compromise.

Technical Details of CVE-2021-44123

Vulnerability Description

The issue lies in SPIP 4.0.0's image processing functionality, which fails to properly handle files with double extensions, enabling malicious code execution.

Affected Systems and Versions

Product: SPIP
Version: 4.0.0

Exploitation Mechanism

Craft a picture with a double extension (e.g., image.jpg.php).
Upload the malicious picture to the system.
Trigger the execution by clicking on the uploaded image.

Mitigation and Prevention

Immediate Steps to Take

Avoid clicking on unverified or suspicious image files.
Implement file extension restrictions on uploads to prevent files with multiple extensions.

Long-Term Security Practices

Regularly update SPIP to the latest version to patch known vulnerabilities.
Educate users on safe browsing habits and the risks associated with opening unknown files.

Patching and Updates

Ensure that SPIP is updated to the latest version available to mitigate the CVE-2021-44123 vulnerability.