CVE-2018-12360 : What You Need to Know

A potential vulnerability, known as use-after-free, may occur when the deletion of an input element takes place while a mutation event handler is triggered by focusing on that particular element. This vulnerability impacts Thunderbird versions prior to 60, Thunderbird versions prior to 52.9, Firefox ESR versions prior to 60.1, Firefox ESR versions prior to 52.9, as well as Firefox versions prior to 61.

Understanding CVE-2018-12360

What is CVE-2018-12360?

A use-after-free vulnerability can occur when deleting an input element during a mutation event handler triggered by focusing on that element, potentially leading to a crash that could be exploited.

The Impact of CVE-2018-12360

This vulnerability affects Thunderbird, Firefox ESR, and Firefox versions, potentially allowing for exploitation and crashes.

Technical Details of CVE-2018-12360

Vulnerability Description

The vulnerability arises from a use-after-free scenario triggered by focusing on an input element during a mutation event handler.

Affected Systems and Versions

Thunderbird versions prior to 60 and 52.9
Firefox ESR versions prior to 60.1 and 52.9
Firefox versions prior to 61

Exploitation Mechanism

The vulnerability can be exploited by manipulating the focus on an input element during a mutation event, leading to a crash.

Mitigation and Prevention

Immediate Steps to Take

Update Thunderbird, Firefox ESR, and Firefox to versions 60, 60.1, and 61 respectively.
Apply patches provided by the vendors.

Long-Term Security Practices

Regularly update software to the latest versions.
Implement secure coding practices to prevent similar vulnerabilities.

Patching and Updates

Monitor vendor advisories for security updates.
Apply patches promptly to mitigate the risk of exploitation.