Cloud Vulnerability DB
An open project to list all known cloud vulnerabilities and Cloud Service Provider security issues
Vulnerability DatabaseCVE-2021-30047
CVE-2021-30047:
vsftpd vulnerability analysis and mitigation
Overview
VSFTPD 3.0.3 is affected by a denial of service vulnerability due to limitations in the number of connections allowed. The vulnerability was discovered in 2021 and assigned CVE-2021-30047. The issue affects version 3.0.3 of the VSFTPD (Very Secure FTP Daemon) software (CVE Details).
Technical details
The vulnerability has been assigned a CVSS v3.1 base score of 7.5 (HIGH) with the vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. The vulnerability can be exploited remotely and requires no privileges or user interaction. The attack impacts only the availability of the system, with no effect on confidentiality or integrity (NVD).
Impact
When exploited, this vulnerability allows attackers to cause a denial of service condition by exhausting the limited number of allowed connections to the FTP server. This can prevent legitimate users from accessing the FTP service (Exploit DB).
Mitigation and workarounds
Some security teams have questioned the validity of this CVE assignment. For instance, Ubuntu's security team has marked this as "not-affected" and noted that "this CVE assignment makes no sense" (Ubuntu).
Additional resources
Source: This report was generated using AI
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