CVE-2021-30047 : Vulnerability Insights and Analysis

A denial of service vulnerability in VSFTPD 3.0.3 due to a limited number of connections allowed.

Understanding CVE-2021-30047

VSFTPD 3.0.3 allows attackers to cause a denial of service due to a limited number of connections allowed.

What is CVE-2021-30047?

CVE-2021-30047 is a vulnerability in VSFTPD 3.0.3 that enables attackers to launch denial of service attacks by exploiting the limited number of connections allowed.

The Impact of CVE-2021-30047

This vulnerability can lead to service disruption and downtime, impacting the availability of the affected system and potentially causing loss of service for legitimate users.

Technical Details of CVE-2021-30047

This section provides more in-depth technical information about the CVE.

Vulnerability Description

The vulnerability in VSFTPD 3.0.3 allows attackers to exhaust the connection limit, leading to a denial of service condition.

Affected Systems and Versions

The issue affects VSFTPD 3.0.3.

Exploitation Mechanism

Attackers can exploit this vulnerability by establishing more connections than the allowed limit, thereby overloading the system and causing a denial of service.

Mitigation and Prevention

Here are the steps to mitigate and prevent exploitation of CVE-2021-30047.

Immediate Steps to Take

Update VSFTPD to the latest version provided by the vendor.
Implement network monitoring to detect any abnormal connection behavior.

Long-Term Security Practices

Regularly update and patch software to address known vulnerabilities.
Employ firewall rules to limit the number of connections from a single host.

Patching and Updates

Stay informed about security updates for VSFTPD and promptly apply patches to prevent exploitation of this vulnerability.