CVE-2019-11740 : What You Need to Know

Memory safety bugs in Firefox versions 68 and Firefox ESR versions 68 and 60.8 were identified by Mozilla developers and community members. This vulnerability affects Firefox versions preceding 69, Thunderbird versions preceding 68.1 and 60.9, as well as Firefox ESR versions preceding 60.9 and 68.1.

Understanding CVE-2019-11740

Mozilla reported memory safety bugs in Firefox and Firefox ESR versions that could potentially lead to arbitrary code execution.

What is CVE-2019-11740?

This CVE identifies memory safety bugs in Firefox versions 68 and Firefox ESR versions 68 and 60.8, which could be exploited for executing arbitrary code.

The Impact of CVE-2019-11740

The vulnerability could allow attackers to exploit memory corruption issues, potentially leading to arbitrary code execution on affected systems.

Technical Details of CVE-2019-11740

Mozilla developers and community members reported memory safety bugs in specific versions of Firefox and Thunderbird.

Vulnerability Description

Certain bugs in Firefox 68 and Firefox ESR versions 68 and 60.8 showed signs of memory corruption, indicating the potential for arbitrary code execution.

Affected Systems and Versions

Firefox versions preceding 69
Thunderbird versions preceding 68.1 and 60.9
Firefox ESR versions preceding 60.9 and 68.1

Exploitation Mechanism

The vulnerability could be exploited by attackers to manipulate memory corruption issues and execute arbitrary code on vulnerable systems.

Mitigation and Prevention

Immediate Steps to Take:

Update Firefox and Thunderbird to versions 69, 68.1, and 60.9 or higher.
Consider disabling JavaScript in the browser to reduce the attack surface. Long-Term Security Practices:
Regularly update software and apply security patches promptly.
Implement strong security measures such as using firewalls and antivirus programs.
Educate users about safe browsing practices and potential threats.
Monitor security advisories from vendors and apply recommended security configurations.

Patching and Updates

Ensure all systems running affected versions of Firefox, Thunderbird, and Firefox ESR are updated to versions 69, 68.1, and 60.9 or later to mitigate the vulnerability.