CVE-2019-11741 Explained : Impact and Mitigation

A vulnerability in Firefox versions prior to 69 allows for Universal Cross-Site Scripting (UXSS) attacks, potentially enabling unauthorized changes to user configurations.

Understanding CVE-2019-11741

Content processes within a sandboxed environment are susceptible to UXSS attacks, particularly affecting addons.mozilla.org and accounts.firefox.com.

What is CVE-2019-11741?

UXSS attack occurs when compromised content processes manipulate content from any loaded site
Vulnerability impacts Firefox versions before 69

The Impact of CVE-2019-11741

Attackers could exploit sites like addons.mozilla.org and accounts.firefox.com to modify user configurations
Segregation of these sites into dedicated processes to prevent unauthorized changes

Technical Details of CVE-2019-11741

Firefox vulnerability details and affected systems.

Vulnerability Description

Compromised sandboxed content processes can execute UXSS attacks
Malicious manipulation of addons.mozilla.org and accounts.firefox.com can modify Firefox configurations

Affected Systems and Versions

Product: Firefox
Vendor: Mozilla
Versions affected: < 69

Exploitation Mechanism

Compromised content processes within a sandboxed environment
Ability to manipulate content from any loaded site

Mitigation and Prevention

Steps to address and prevent CVE-2019-11741.

Immediate Steps to Take

Update Firefox to version 69 or newer
Be cautious while browsing and interacting with websites

Long-Term Security Practices

Regularly update browsers and security software
Educate users on safe browsing practices

Patching and Updates

Mozilla has segregated vulnerable sites into dedicated processes
Regularly check for security updates and apply patches promptly