CVE-2019-10735 : What You Need to Know

Claws Mail version 3.14.1 allows attackers to embed encrypted emails within a multipart email, potentially exposing sensitive information.

Understanding CVE-2019-10735

What is CVE-2019-10735?

In Claws Mail 3.14.1, attackers can hide S/MIME or PGP encrypted emails within a crafted multipart email, leading to potential data exposure.

The Impact of CVE-2019-10735

Attackers can exploit this vulnerability to intercept and view encrypted email content by tricking recipients into replying to maliciously crafted emails.

Technical Details of CVE-2019-10735

Vulnerability Description

Attackers can embed encrypted emails in multipart emails, concealing them with HTML/CSS or ASCII newline characters.

Affected Systems and Versions

Product: Claws Mail
Version: 3.14.1

Exploitation Mechanism

Crafted multipart emails containing hidden encrypted sections can be sent to recipients for data exposure.

Mitigation and Prevention

Immediate Steps to Take

Avoid replying to suspicious multipart emails with encrypted content.
Use alternative secure communication channels for sensitive information.

Long-Term Security Practices

Educate users on email security best practices to recognize and avoid such attacks.

Patching and Updates

Update Claws Mail to the latest version to patch this vulnerability.