CVE-2019-11692 : Vulnerability Insights and Analysis

A use-after-free vulnerability in Thunderbird, Firefox, and Firefox ESR versions prior to specified versions can lead to exploitable crashes.

Understanding CVE-2019-11692

This CVE involves a use-after-free vulnerability that can result in potentially exploitable crashes in affected Mozilla products.

What is CVE-2019-11692?

A use-after-free vulnerability occurs when listeners are removed from the event listener manager prematurely, leading to exploitable crashes in Thunderbird, Firefox, and Firefox ESR versions older than specific versions.

The Impact of CVE-2019-11692

The vulnerability poses a risk of exploitable crashes when listeners are removed from the event listener manager before they are finished being used, affecting Thunderbird, Firefox, and Firefox ESR.

Technical Details of CVE-2019-11692

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The vulnerability arises from removing listeners in the event listener manager prematurely, causing a use-after-free scenario and potentially exploitable crashes.

Affected Systems and Versions

Thunderbird versions older than 60.7
Firefox versions older than 67
Firefox ESR versions older than 60.7

Exploitation Mechanism

The vulnerability is exploited by removing listeners from the event listener manager before they have completed their use, triggering a use-after-free condition.

Mitigation and Prevention

Protecting systems from CVE-2019-11692 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update Thunderbird, Firefox, and Firefox ESR to versions 60.7, 67, and 60.7 respectively.
Monitor vendor security advisories for patches and updates.

Long-Term Security Practices

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

Patching and Updates

Apply patches provided by Mozilla promptly to address the vulnerability.