CVE-2017-17848 : Security Advisory and Response

A vulnerability has been identified in Enigmail versions prior to 1.9.9, allowing for signature spoofing in multipart/related messages.

Understanding CVE-2017-17848

This CVE involves a variation of CVE-2017-17847, enabling signature spoofing in certain Enigmail versions.

What is CVE-2017-17848?

An issue in Enigmail before version 1.9.9 allows for signature spoofing in multipart/related messages, making the entire message appear signed while hiding the signed text from the recipient.

The Impact of CVE-2017-17848

This vulnerability could lead to malicious actors spoofing signatures in emails, potentially deceiving recipients into trusting forged messages.

Technical Details of CVE-2017-17848

Enigmail vulnerability details and affected systems.

Vulnerability Description

In Enigmail versions prior to 1.9.9, a signed message part referenced using a cid: URI may not be visible to the recipient, making the entire message seem signed without displaying the signed text.

Affected Systems and Versions

Product: Enigmail
Vendor: N/A
Versions: Prior to 1.9.9

Exploitation Mechanism

The vulnerability allows attackers to spoof signatures in multipart/related messages by referencing signed message parts using cid: URIs that remain hidden from recipients.

Mitigation and Prevention

Steps to mitigate and prevent exploitation of CVE-2017-17848.

Immediate Steps to Take

Update Enigmail to version 1.9.9 or later to patch the vulnerability.
Be cautious when opening emails with signed content to avoid falling victim to spoofed signatures.

Long-Term Security Practices

Regularly update software and email clients to protect against known vulnerabilities.
Educate users on email security best practices to recognize and avoid potential threats.

Patching and Updates

Ensure timely installation of security patches and updates for Enigmail to address vulnerabilities and enhance email security.