CVE-2019-11700 : What You Need to Know
Learn about CVE-2019-11700, a vulnerability in Firefox versions prior to 67 that allows users to open local files using a crafted hyperlink on Windows. Find out the impact, affected systems, exploitation mechanism, and mitigation steps.
This CVE involves a vulnerability in Firefox versions prior to 67 that allows users to open local files using a hyperlink with the res: protocol on Windows. The issue arises when users consent to its execution when prompted.
Understanding CVE-2019-11700
This vulnerability is specific to Windows and does not affect other operating systems.
What is CVE-2019-11700?
A hyperlink utilizing the res: protocol can be exploited to open local files at a known location in Internet Explorer if the user approves execution when prompted. The vulnerability impacts Firefox versions less than 67.
The Impact of CVE-2019-11700
- Users can unknowingly open local files through a crafted hyperlink, potentially leading to unauthorized access to sensitive information.
- This issue poses a security risk as it allows malicious actors to exploit user consent to execute harmful actions.
Technical Details of CVE-2019-11700
This section provides detailed technical information about the vulnerability.
Vulnerability Description
The res: protocol can be abused to open known local files, posing a security risk to affected systems.
Affected Systems and Versions
- Product: Firefox
- Vendor: Mozilla
- Versions Affected: Prior to version 67
Exploitation Mechanism
The vulnerability is exploited by crafting a hyperlink with the res: protocol, tricking users into opening local files when prompted.
Mitigation and Prevention
It is crucial to take immediate steps to mitigate the risks posed by CVE-2019-11700.
Immediate Steps to Take
- Update Firefox to version 67 or above to patch the vulnerability.
- Exercise caution when clicking on hyperlinks, especially those using the res: protocol.
Long-Term Security Practices
- Regularly update browsers and software to ensure protection against known vulnerabilities.
- Educate users about the risks associated with opening files from untrusted sources.
Patching and Updates
- Stay informed about security advisories from Mozilla to promptly apply patches and updates to secure systems.