CVE-2018-12386 Explained : Impact and Mitigation
Learn about CVE-2018-12386, a type confusion vulnerability in JavaScript register allocation affecting Mozilla Firefox ESR and Firefox versions < 60.2.2 and < 62.0.3. Find mitigation steps and updates here.
A type confusion vulnerability in JavaScript register allocation affecting Firefox ESR and Firefox versions.
Understanding CVE-2018-12386
What is CVE-2018-12386?
This CVE involves a type confusion issue in JavaScript register allocation, leading to a vulnerability that allows arbitrary read and write operations. Exploiting this vulnerability can result in remote code execution within the sandboxed content process.
The Impact of CVE-2018-12386
The vulnerability affects Firefox ESR versions prior to 60.2.2 and Firefox versions prior to 62.0.3.
Technical Details of CVE-2018-12386
Vulnerability Description
The vulnerability arises from a type confusion in JavaScript register allocation, enabling unauthorized read and write actions.
Affected Systems and Versions
- Product: Firefox ESR
- Vendor: Mozilla
- Versions Affected: < 60.2.2
- Product: Firefox
- Vendor: Mozilla
- Versions Affected: < 62.0.3
Exploitation Mechanism
The vulnerability allows attackers to execute remote code within the content process by exploiting the type confusion in JavaScript register allocation.
Mitigation and Prevention
Immediate Steps to Take
- Update Firefox ESR to version 60.2.2 or later.
- Update Firefox to version 62.0.3 or later.
- Consider using security tools to monitor and block potential exploits.
Long-Term Security Practices
- Regularly update browsers and software to the latest versions.
- Educate users on safe browsing practices and potential threats.
Patching and Updates
- Apply security patches provided by Mozilla promptly to address the vulnerability.