CVE-2018-12378 : Security Advisory and Response
Learn about CVE-2018-12378, a use-after-free vulnerability in Firefox, Firefox ESR, and Thunderbird versions less than 62, 60.2, and 60.2.1. Find out the impact, affected systems, exploitation mechanism, and mitigation steps.
A use-after-free vulnerability in Firefox, Firefox ESR, and Thunderbird could lead to a potentially exploitable crash.
Understanding CVE-2018-12378
What is CVE-2018-12378?
This vulnerability arises when a JavaScript code deletes an IndexedDB index still in use, potentially causing a crash that could be exploited.
The Impact of CVE-2018-12378
The vulnerability affects Firefox versions less than 62, Firefox ESR versions less than 60.2, and Thunderbird versions less than 60.2.1.
Technical Details of CVE-2018-12378
Vulnerability Description
A use-after-free vulnerability occurs when an IndexedDB index is deleted while still in use, leading to a potentially exploitable crash.
Affected Systems and Versions
- Firefox versions less than 62
- Firefox ESR versions less than 60.2
- Thunderbird versions less than 60.2.1
Exploitation Mechanism
The vulnerability can be exploited if a JavaScript code providing payload values for storage deletes an IndexedDB index that is still in use.
Mitigation and Prevention
Immediate Steps to Take
- Update Firefox, Firefox ESR, and Thunderbird to versions 62, 60.2, and 60.2.1 respectively.
- Avoid executing JavaScript code from untrusted sources.
Long-Term Security Practices
- Regularly update browsers and email clients to the latest versions.
- Implement secure coding practices to prevent use-after-free vulnerabilities.
Patching and Updates
Apply security patches provided by Mozilla for Firefox, Firefox ESR, and Thunderbird.