CVE-2020-12405 : What You Need to Know
Learn about CVE-2020-12405, a vulnerability in Mozilla Thunderbird, Firefox, and Firefox ESR that could lead to exploitable crashes when browsing malicious pages. Find out how to mitigate and prevent this issue.
A race condition in SharedWorkerService in Mozilla Thunderbird, Firefox, and Firefox ESR could lead to a potentially exploitable crash when browsing malicious pages.
Understanding CVE-2020-12405
What is CVE-2020-12405?
When browsing a malicious page, a race condition in SharedWorkerService could occur, leading to a potentially exploitable crash in Thunderbird, Firefox, and Firefox ESR.
The Impact of CVE-2020-12405
This vulnerability affects Thunderbird < 68.9.0, Firefox < 77, and Firefox ESR < 68.9, potentially allowing attackers to exploit the system.
Technical Details of CVE-2020-12405
Vulnerability Description
The vulnerability is a race condition in SharedWorkerService, posing a risk of exploitable crashes.
Affected Systems and Versions
- Thunderbird < 68.9.0
- Firefox < 77
- Firefox ESR < 68.9
Exploitation Mechanism
The vulnerability can be exploited by browsing a malicious page, triggering the race condition in SharedWorkerService.
Mitigation and Prevention
Immediate Steps to Take
- Update Thunderbird, Firefox, and Firefox ESR to versions 68.9.0, 77, and 68.9 respectively.
- Avoid visiting untrusted or malicious websites.
Long-Term Security Practices
- Regularly update software to the latest versions.
- Implement strong browsing habits and exercise caution when clicking on links.
Patching and Updates
Apply patches provided by Mozilla to address the vulnerability.