CVE-2021-20755 : What You Need to Know

Cybozu Garoon versions 4.0.0 to 5.0.2 are affected by a viewing restrictions bypass vulnerability that allows remote attackers to access Portal data without proper viewing privilege.

Understanding CVE-2021-20755

This CVE involves a security flaw in Cybozu Garoon versions 4.0.0 to 5.0.2 that can be exploited by authenticated remote attackers.

What is CVE-2021-20755?

The vulnerability in Cybozu Garoon versions 4.0.0 to 5.0.2 enables a remote attacker to obtain Portal data without the necessary viewing privilege.

The Impact of CVE-2021-20755

The impact of this CVE is significant as it allows unauthorized access to sensitive information within the Portal of affected systems.

Technical Details of CVE-2021-20755

This section provides more detailed technical information about the vulnerability.

Vulnerability Description

The flaw allows remote authenticated attackers to bypass viewing restrictions and access Portal data.

Affected Systems and Versions

Cybozu Garoon versions 4.0.0 to 5.0.2 are confirmed to be affected by this vulnerability.

Exploitation Mechanism

Attackers with authenticated remote access can exploit this vulnerability to bypass viewing restrictions.

Mitigation and Prevention

To protect systems from CVE-2021-20755, following immediate steps and long-term security practices are recommended:

Immediate Steps to Take

Update Cybozu Garoon to a patched version that fixes the viewing restrictions bypass vulnerability.
Restrict network access to the Cybozu Garoon Portal to authorized users only.

Long-Term Security Practices

Regularly monitor and audit access logs to detect any unauthorized activity.
Conduct security training for users to raise awareness about data protection best practices.

Patching and Updates

Stay informed about security updates from Cybozu, Inc. and promptly apply patches to address known vulnerabilities.