CVE-2019-9806 Explained : Impact and Mitigation

Firefox versions prior to 66 are vulnerable to a security flaw in the FTP authorization process that can lead to a denial of service (DOS) attack.

Understanding CVE-2019-9806

This CVE identifies a vulnerability in Firefox that allows for a DOS attack through successive FTP authorization prompts.

What is CVE-2019-9806?

The vulnerability in the FTP authorization process in Firefox versions before 66 enables a DOS attack by displaying multiple modal prompts that cannot be dismissed immediately.

The Impact of CVE-2019-9806

The security flaw in CVE-2019-9806 poses a risk of DOS attacks due to the inability to dismiss multiple modal prompts in the FTP authorization process.

Technical Details of CVE-2019-9806

Firefox's vulnerability to a DOS attack through FTP authorization prompts is a critical issue that requires attention.

Vulnerability Description

The flaw allows for a DOS attack by displaying multiple modal prompts that cannot be dismissed promptly.

Affected Systems and Versions

Product: Firefox
Vendor: Mozilla
Versions Affected: < 66

Exploitation Mechanism

Attackers can exploit this vulnerability by triggering multiple FTP authorization prompts, leading to a DOS condition.

Mitigation and Prevention

Taking immediate steps and implementing long-term security practices are crucial to mitigate the risks associated with CVE-2019-9806.

Immediate Steps to Take

Update Firefox to version 66 or higher to eliminate the vulnerability.
Avoid interacting with FTP sites that may trigger multiple authorization prompts.

Long-Term Security Practices

Regularly update Firefox to the latest version to patch security vulnerabilities.
Educate users on recognizing and avoiding potential DOS attack scenarios.

Patching and Updates

Stay informed about security advisories from Mozilla and promptly apply patches to secure the browser.