CVE-2017-7830 : What You Need to Know

A security vulnerability in Mozilla products Firefox, Firefox ESR, and Thunderbird that allowed for cross-origin URL information leak through the Resource Timing API.

Understanding CVE-2017-7830

This CVE entry highlights a flaw in the Resource Timing API affecting various Mozilla products.

What is CVE-2017-7830?

The vulnerability in the Resource Timing API led to the disclosure of navigations in cross-origin iframes, violating the same-origin policy and potentially enabling theft of URLs accessed by users.

The Impact of CVE-2017-7830

The security issue impacted Firefox versions earlier than 57, Firefox ESR versions earlier than 52.5, and Thunderbird versions earlier than 52.5.

Technical Details of CVE-2017-7830

This section delves into the technical aspects of the CVE.

Vulnerability Description

The Resource Timing API incorrectly revealed navigations in cross-origin iframes, posing a data theft risk for URLs loaded by users.

Affected Systems and Versions

Firefox versions prior to 57
Firefox ESR versions prior to 52.5
Thunderbird versions prior to 52.5

Exploitation Mechanism

The flaw allowed for cross-origin URL information leak through the Resource Timing API.

Mitigation and Prevention

Guidelines to address and prevent the CVE.

Immediate Steps to Take

Update affected Mozilla products to versions 57 (or later) for Firefox and 52.5 (or later) for Firefox ESR and Thunderbird.
Consider restricting cross-origin iframe interactions.

Long-Term Security Practices

Regularly update software to the latest versions to mitigate known vulnerabilities.
Implement strict same-origin policy enforcement to prevent cross-origin data leaks.

Patching and Updates

Stay informed about security advisories from Mozilla and promptly apply patches to address vulnerabilities.