CVE-2021-43270 : What You Need to Know

Datalust Seq.App.EmailPlus (aka seq-app-htmlemail) versions 3.1.0-dev-00148, 3.1.0-dev-00170, and 3.1.0-dev-00176 may inadvertently use cleartext SMTP on port 25 instead of encrypted port 465.

Understanding CVE-2021-43270

This CVE involves a potential security vulnerability in Datalust Seq.App.EmailPlus versions.

What is CVE-2021-43270?

The vulnerability allows for the use of cleartext SMTP on the wrong port in specific instances.

The Impact of CVE-2021-43270

The vulnerability could lead to sensitive data exposure due to the incorrect usage of SMTP protocols.

Technical Details of CVE-2021-43270

Details about the technical aspects of the CVE.

Vulnerability Description

Seq.App.EmailPlus versions 3.1.0-dev-00148, 3.1.0-dev-00170, and 3.1.0-dev-00176 can use cleartext SMTP on port 25 instead of encrypted port 465 in certain scenarios.

Affected Systems and Versions

Product: N/A
Vendor: N/A
Versions: 3.1.0-dev-00148, 3.1.0-dev-00170, 3.1.0-dev-00176

Exploitation Mechanism

The vulnerability arises from using cleartext SMTP on port 25 when encryption on port 465 was intended.

Mitigation and Prevention

Steps to address and prevent exploitation of the vulnerability.

Immediate Steps to Take

Users should ensure proper configuration of SMTP protocols and ports.
Consider restricting SMTP traffic to specific secure ports.

Long-Term Security Practices

Regularly update and monitor email server configurations to prevent misconfigurations.
Implement transport layer security (TLS) for enhanced data encryption.
Perform regular security audits and testing to identify and remediate vulnerabilities.

Patching and Updates

Stay informed about security updates and patches provided by Datalust to address this vulnerability.