CVE-2018-12369 : Exploit Details and Defense Strategies
Learn about CVE-2018-12369, a security flaw in Firefox ESR and Firefox versions that allowed malicious WebExtensions to gain unrestricted browser permissions. Find out how to mitigate this vulnerability.
A security vulnerability in Firefox ESR and Firefox versions allowed malicious WebExtensions to gain unrestricted browser permissions.
Understanding CVE-2018-12369
What is CVE-2018-12369?
The authorization process for bundled WebExtensions with embedded experiments was not appropriately verified, creating a loophole for malicious WebExtensions to obtain unrestricted browser permissions.
The Impact of CVE-2018-12369
This security vulnerability affects Firefox ESR versions prior to 60.1 and Firefox versions prior to 61.
Technical Details of CVE-2018-12369
Vulnerability Description
WebExtensions bundled with embedded experiments were not correctly checked for proper authorization, enabling malicious WebExtensions to gain full browser permissions.
Affected Systems and Versions
- Product: Firefox ESR
- Vendor: Mozilla
- Versions Affected: < 60.1
- Product: Firefox
- Vendor: Mozilla
- Versions Affected: < 61
Exploitation Mechanism
The vulnerability allowed malicious WebExtensions to bypass security permission checks through embedded experiments.
Mitigation and Prevention
Immediate Steps to Take
- Update Firefox ESR to version 60.1 or newer.
- Update Firefox to version 61 or newer.
- Disable or remove any suspicious WebExtensions.
Long-Term Security Practices
- Regularly update browsers and extensions.
- Be cautious when installing new extensions and only use trusted sources.
Patching and Updates
Apply security patches and updates provided by Mozilla to address this vulnerability.