CVE-2019-11755 : What You Need to Know
Learn about CVE-2019-11755, a vulnerability in Thunderbird versions prior to 68.1.1 allowing the display of a valid digital signature for a crafted S/MIME message, potentially leading to message author spoofing. Find mitigation steps and prevention measures here.
A vulnerability in Thunderbird versions prior to 68.1.1 allowed the display of a valid digital signature for a crafted S/MIME message. This could lead to spoofing a message author via a crafted S/MIME message.
Understanding CVE-2019-11755
What is CVE-2019-11755?
The vulnerability in Thunderbird versions prior to 68.1.1 allowed the display of a valid digital signature for a crafted S/MIME message, potentially leading to message author spoofing.
The Impact of CVE-2019-11755
The vulnerability could allow an attacker to display a valid digital signature for a crafted S/MIME message, potentially leading to spoofing a message author.
Technical Details of CVE-2019-11755
Vulnerability Description
A crafted S/MIME message with an inner encryption layer and an outer SignedData layer could display a valid digital signature, potentially allowing message author spoofing.
Affected Systems and Versions
- Product: Thunderbird
- Vendor: Mozilla
- Versions Affected: < 68.1.1
Exploitation Mechanism
The vulnerability could be exploited by crafting a malicious S/MIME message to display a valid digital signature, enabling message author spoofing.
Mitigation and Prevention
Immediate Steps to Take
- Update Thunderbird to version 68.1.1 or later to mitigate the vulnerability.
- Be cautious when opening S/MIME messages from untrusted sources.
Long-Term Security Practices
- Regularly update Thunderbird and other software to the latest versions.
- Educate users on identifying and handling suspicious emails.
Patching and Updates
Apply security patches and updates provided by Mozilla for Thunderbird to address known vulnerabilities.