CVE-2021-20671 Explained : Impact and Mitigation

This CVE-2021-20671 article provides detailed information on the vulnerability found in GROWI versions v4.2.2 and earlier, impacting WESEEK, Inc.'s product.

Understanding CVE-2021-20671

This section will delve into the specifics of the CVE-2021-20671 vulnerability.

What is CVE-2021-20671?

The CVE-2021-20671 vulnerability involves invalid file validation within the upload feature of GROWI versions v4.2.2. This flaw allows a remote attacker with administrative privilege to overwrite files on the server, potentially leading to arbitrary code execution.

The Impact of CVE-2021-20671

The impact of CVE-2021-20671 is severe, as it enables attackers to manipulate files on the server, posing a risk of arbitrary code execution.

Technical Details of CVE-2021-20671

This section will outline the technical aspects of the CVE-2021-20671 vulnerability.

Vulnerability Description

The vulnerability arises from improper input validation in the file upload feature of GROWI versions v4.2.2, allowing unauthorized access to overwrite server files.

Affected Systems and Versions

GROWI versions v4.2.2 and earlier are specifically affected by this vulnerability, impacting users of these versions.

Exploitation Mechanism

Exploiting CVE-2021-20671 requires administrative privileges, granting attackers the ability to upload malicious files and execute arbitrary code.

Mitigation and Prevention

This section covers recommended actions to mitigate the risks posed by CVE-2021-20671.

Immediate Steps to Take

Users are advised to update GROWI to a patched version beyond v4.2.2 to prevent exploitation of this vulnerability. Additionally, restricting administrative privileges can limit potential damage.

Long-Term Security Practices

Maintaining regular software updates, implementing secure coding practices, and conducting security audits can enhance the overall security posture against similar threats.

Patching and Updates

WESEEK, Inc. should release patches addressing the file validation issue in GROWI to ensure the security and integrity of the application.