CVE-2018-18495 : What You Need to Know
Learn about CVE-2018-18495, a security flaw in Mozilla Firefox < 64 allowing WebExtension content scripts to disrupt about: pages and access restricted capabilities. Find mitigation steps here.
A security vulnerability in Mozilla Firefox prior to version 64 allows WebExtension content scripts to load into about: pages, potentially disrupting page functionality and accessing restricted capabilities.
Understanding CVE-2018-18495
This CVE entry highlights a specific issue in Firefox versions before 64 that could be exploited by extensions to interfere with page loading and utilize unauthorized abilities.
What is CVE-2018-18495?
WebExtension content scripts can bypass extension permissions and load into about: pages, enabling them to disrupt page loading and access restricted capabilities.
The Impact of CVE-2018-18495
This vulnerability could allow malicious extensions to interfere with the loading and functionality of about: pages, potentially compromising user security and privacy.
Technical Details of CVE-2018-18495
This section provides more in-depth technical insights into the CVE-2018-18495 vulnerability.
Vulnerability Description
WebExtension content scripts can be loaded into about: pages, contrary to the permissions granted to extensions, allowing unauthorized access to page functionalities.
Affected Systems and Versions
- Product: Firefox
- Vendor: Mozilla
- Versions Affected: < 64
Exploitation Mechanism
The vulnerability arises from extensions being able to load content scripts into about: pages, bypassing the intended restrictions and potentially causing disruptions.
Mitigation and Prevention
To address CVE-2018-18495 and enhance security, follow these mitigation strategies:
Immediate Steps to Take
- Update Firefox to version 64 or higher to mitigate the vulnerability.
- Disable or remove extensions that are not essential to minimize the attack surface.
Long-Term Security Practices
- Regularly review and audit extensions to ensure they adhere to security best practices.
- Educate users on safe extension installation and usage practices to prevent similar vulnerabilities.
Patching and Updates
- Stay informed about security updates from Mozilla and promptly apply patches to secure your browsing experience.