CVE-2017-7767 : Vulnerability Insights and Analysis
Learn about CVE-2017-7767, a Mozilla Firefox and Firefox ESR vulnerability allowing file overwrites on Windows systems. Find mitigation steps and affected versions.
A vulnerability in Mozilla Firefox and Firefox ESR versions allows unprivileged users to overwrite files on Windows systems using the Mozilla Windows Updater and Maintenance Service.
Understanding CVE-2017-7767
What is CVE-2017-7767?
The vulnerability enables unauthorized users to overwrite specific files with junk data by exploiting the Mozilla Windows Updater and Maintenance Service on Windows systems.
The Impact of CVE-2017-7767
The exploit affects Firefox ESR versions less than 52.2 and Firefox versions less than 54 on Windows platforms, requiring local system access.
Technical Details of CVE-2017-7767
Vulnerability Description
The vulnerability allows unprivileged users to overwrite files using the Mozilla Windows Updater and Maintenance Service on Windows systems.
Affected Systems and Versions
- Affected Products: Firefox ESR, Firefox
- Versions: Firefox ESR < 52.2, Firefox < 54
Exploitation Mechanism
- Exploitation involves activating the capability to overwrite files with useless information through the Mozilla Windows Updater.
Mitigation and Prevention
Immediate Steps to Take
- Update Firefox to versions above 52.2 for ESR and 54 for regular Firefox.
- Restrict access to the Mozilla Windows Updater and Maintenance Service.
Long-Term Security Practices
- Regularly monitor and update software to prevent vulnerabilities.
- Implement least privilege access to limit unauthorized actions.
Patching and Updates
- Apply security patches and updates provided by Mozilla to address the vulnerability.