CVE-2019-11753 : Security Advisory and Response

A privilege escalation vulnerability in Mozilla Firefox and Firefox ESR versions prior to specified versions.

Understanding CVE-2019-11753

This CVE involves a vulnerability in the Firefox installer that allows privilege escalation in custom installation locations.

What is CVE-2019-11753?

The Firefox installer vulnerability enables unauthorized users to manipulate the Mozilla Maintenance Service, potentially leading to privilege escalation during the update process.

The Impact of CVE-2019-11753

Attackers can exploit this vulnerability to run altered services with elevated privileges, potentially escalating their access on Windows systems.
Only affects Windows systems; other operating systems are not impacted.

Technical Details of CVE-2019-11753

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The Firefox installer vulnerability allows for privilege escalation through manipulation of the Mozilla Maintenance Service during updates.

Affected Systems and Versions

Firefox versions prior to 69, Firefox ESR versions prior to 60.9, and Firefox ESR versions prior to 68.1 are affected.

Exploitation Mechanism

Attackers need local system access to exploit this vulnerability on Windows systems.

Mitigation and Prevention

Protect your systems from CVE-2019-11753 with these mitigation strategies.

Immediate Steps to Take

Update Firefox and Firefox ESR to versions 69, 60.9, and 68.1 respectively.
Monitor system integrity for any unauthorized changes.

Long-Term Security Practices

Implement least privilege access controls to limit potential escalation paths.
Regularly review and update security configurations.

Patching and Updates

Apply security patches promptly to address known vulnerabilities.