CVE-2021-20756 Explained : Impact and Mitigation

This article provides detailed information about CVE-2021-20756, a viewing restrictions bypass vulnerability in Cybozu Garoon version 4.0.0 to 5.0.2, allowing a remote attacker to access Address data without proper privileges.

Understanding CVE-2021-20756

This section delves into the nature of the vulnerability and its potential impact.

What is CVE-2021-20756?

The CVE-2021-20756 vulnerability is a viewing restrictions bypass issue in Cybozu Garoon 4.0.0 to 5.0.2, enabling a remote authenticated attacker to obtain Address data without the required viewing privilege.

The Impact of CVE-2021-20756

This vulnerability poses a significant risk as it allows unauthorized users to access sensitive data stored in the Address section of Cybozu Garoon.

Technical Details of CVE-2021-20756

In this section, we will explore the specifics of the vulnerability, including affected systems and exploitation methods.

Vulnerability Description

The flaw in Cybozu Garoon versions 4.0.0 to 5.0.2 permits remote attackers to bypass viewing restrictions and retrieve Address data without authorization.

Affected Systems and Versions

Cybozu Garoon versions 4.0.0 to 5.0.2 are confirmed to be impacted by this vulnerability, potentially exposing user data.

Exploitation Mechanism

Remote authenticated attackers can exploit this vulnerability to access Address information without the requisite viewing privileges, compromising data confidentiality.

Mitigation and Prevention

This section outlines measures to mitigate the risks associated with CVE-2021-20756 and prevent potential exploitation.

Immediate Steps to Take

Users are advised to update Cybozu Garoon to a patched version, implement access controls, and monitor for any unauthorized access attempts.

Long-Term Security Practices

Establishing robust user access policies, conducting regular security audits, and promoting security awareness can enhance the overall security posture and prevent similar vulnerabilities.

Patching and Updates

Cybozu, Inc. has released patches addressing the CVE-2021-20756 vulnerability. Users are strongly recommended to apply the latest updates promptly to secure their systems.