CVE-2021-27221 Explained : Impact and Mitigation

A detailed overview of CVE-2021-27221, a vulnerability in MikroTik RouterOS 6.47.9 that allows remote authenticated ftp users to create or overwrite arbitrary .rsc files.

Understanding CVE-2021-27221

This section delves into the impact and technical specifics of the CVE-2021-27221 vulnerability.

What is CVE-2021-27221?

MikroTik RouterOS 6.47.9 allows remote authenticated ftp users to create or overwrite arbitrary .rsc files via the /export command. The vendor considers this behavior as intended due to user policies.

The Impact of CVE-2021-27221

The vulnerability in MikroTik RouterOS 6.47.9 could be exploited by remote authenticated ftp users to manipulate .rsc files, potentially leading to unauthorized access or data loss.

Technical Details of CVE-2021-27221

Explore vulnerabilities, affected systems and versions, and exploitation mechanisms.

Vulnerability Description

The flaw in MikroTik RouterOS 6.47.9 permits authenticated ftp users to modify .rsc files through the /export command, which may pose security risks.

Affected Systems and Versions

All versions of MikroTik RouterOS 6.47.9 are impacted by this vulnerability, allowing authenticated ftp users to tamper with .rsc files.

Exploitation Mechanism

By exploiting the /export command, remote authenticated ftp users can create or overwrite arbitrary .rsc files on MikroTik RouterOS 6.47.9.

Mitigation and Prevention

Learn how to address and prevent the CVE-2021-27221 vulnerability.

Immediate Steps to Take

Users should review their ftp user policies, restrict access, and monitor file changes to mitigate the risk of exploitation.

Long-Term Security Practices

Implement stringent access controls, conduct regular security assessments, and keep systems updated to enhance overall security posture.

Patching and Updates

Ensure timely installation of patches and updates released by MikroTik to address the CVE-2021-27221 vulnerability.