CVE-2021-43970 : What You Need to Know

An arbitrary file upload vulnerability exists in albumimages.jsp in Quicklert for Digium 10.0.0 (1043) via a .mp3;.jsp filename for a file that begins with audio data bytes. It allows an authenticated (low privileged) attacker to execute remote code on the target server within the context of application's permissions (SYSTEM).

Understanding CVE-2021-43970

This CVE involves an arbitrary file upload vulnerability in Quicklert for Digium, potentially leading to remote code execution.

What is CVE-2021-43970?

CVE-2021-43970 is an arbitrary file upload vulnerability found in albumimages.jsp in Quicklert for Digium 10.0.0 (1043) using a specific file naming pattern.

The Impact of CVE-2021-43970

The vulnerability allows an authenticated attacker to upload files with malicious content, leading to remote code execution on the target server within the application's permissions.

Technical Details of CVE-2021-43970

This section provides more technical insights into the CVE.

Vulnerability Description

The vulnerability exists in albumimages.jsp in Quicklert for Digium 10.0.0 (1043) through a specific file naming convention, enabling attackers to upload potentially harmful files.

Affected Systems and Versions

System: Quicklert for Digium 10.0.0 (1043)
Versions: N/A

Exploitation Mechanism

Attackers upload files with .mp3;.jsp filenames containing audio data bytes to initiate remote code execution.

Mitigation and Prevention

Protect your systems from the CVE with these essential steps.

Immediate Steps to Take

Update Quicklert for Digium to the latest version.
Restrict access to vulnerable components.
Monitor file uploads for suspicious filenames.

Long-Term Security Practices

Conduct regular security assessments and penetration testing.
Implement access controls and least privilege principles.
Educate users on safe file uploading practices.

Patching and Updates

Apply patches provided by Quicklert for Digium promptly.