CVE-2018-5138 : Security Advisory and Response

A vulnerability in Firefox for Android allows spoofing of loaded pages when encountering malicious websites with excessively long domain names.

Understanding CVE-2018-5138

What is CVE-2018-5138?

This CVE describes a spoofing vulnerability in Firefox for Android that can be exploited when a malevolent website with an extremely long domain name is opened in an Android Custom Tab.

The Impact of CVE-2018-5138

The vulnerability could enable an attacker to deceive users about the actual loaded page, potentially leading to phishing attacks or other malicious activities.

Technical Details of CVE-2018-5138

Vulnerability Description

An Android Custom Tab in Firefox for Android is susceptible to address spoofing through long domain names.

Affected Systems and Versions

Product: Firefox
Vendor: Mozilla
Versions Affected: Prior to version 59

Exploitation Mechanism

Spoofing occurs when a malicious site with an excessively long domain name is opened in Firefox for Android, allowing attackers to manipulate the loaded page.

Mitigation and Prevention

Immediate Steps to Take

Update Firefox for Android to version 59 or newer to mitigate the vulnerability.
Avoid visiting unfamiliar or suspicious websites to reduce the risk of exploitation.

Long-Term Security Practices

Regularly update browsers and applications to patch known vulnerabilities.
Educate users about safe browsing practices and the importance of staying vigilant against phishing attempts.

Patching and Updates

Stay informed about security advisories from Mozilla and apply recommended patches promptly.