CVE-2019-11765 : What You Need to Know
Learn about CVE-2019-11765, a Firefox vulnerability allowing incorrect permissions to be granted to websites, potentially compromising user security. Find out how to mitigate and prevent this issue.
A content process in Firefox before version 70 can grant incorrect permissions to a website, allowing an attacker-controlled permission instead of the intended 'Click to Play' permission.
Understanding CVE-2019-11765
What is CVE-2019-11765?
A compromised content process in Firefox can manipulate the 'Click to Play' permission prompt, leading to the granting of unauthorized permissions.
The Impact of CVE-2019-11765
This vulnerability allows attackers to gain control over permissions in Firefox, potentially compromising user security and privacy.
Technical Details of CVE-2019-11765
Vulnerability Description
A compromised content process can trick the parent process into granting unauthorized permissions in Firefox versions prior to 70.
Affected Systems and Versions
- Product: Firefox
- Vendor: Mozilla
- Versions Affected: Before 70
Exploitation Mechanism
The issue arises from the failure of the parent process to validate messages from compromised content processes, leading to incorrect permission grants.
Mitigation and Prevention
Immediate Steps to Take
- Update Firefox to version 70 or above to mitigate this vulnerability.
- Be cautious when granting permissions to websites, especially in older Firefox versions.
Long-Term Security Practices
- Regularly update your browser to the latest version to ensure security patches are applied.
- Practice safe browsing habits and avoid interacting with suspicious websites.
Patching and Updates
Mozilla has addressed this vulnerability in Firefox version 70, which includes fixes to prevent unauthorized permission grants.