CVE-2020-6798 : Security Advisory and Response

A cross-site scripting vulnerability affecting Thunderbird and Firefox versions.

Understanding CVE-2020-6798

This CVE involves incorrect parsing of template tags leading to potential JavaScript injection.

What is CVE-2020-6798?

The vulnerability allows JavaScript parsing and execution due to confusion in parsing template tags.
Thunderbird < 68.5, Firefox < 73, and Firefox < ESR68.5 are impacted.

The Impact of CVE-2020-6798

Cross-site scripting vulnerability risk in browser contexts.
Thunderbird is less susceptible as scripting is disabled when reading mail.

Technical Details of CVE-2020-6798

A vulnerability that can lead to JavaScript injection due to incorrect parsing of template tags.

Vulnerability Description

Template tag misuse can allow JavaScript execution.

Affected Systems and Versions

Thunderbird < 68.5
Firefox < 73, Firefox < ESR68.5

Exploitation Mechanism

Use of template tags in select tags can confuse the parser, enabling JavaScript execution.

Mitigation and Prevention

Steps to address and prevent exploitation of CVE-2020-6798.

Immediate Steps to Take

Update Thunderbird and Firefox to versions above the specified vulnerable versions.
Disable JavaScript in browsers if not required.

Long-Term Security Practices

Regularly update browsers and email clients.
Educate users on safe browsing habits.

Patching and Updates

Apply security patches provided by Mozilla.