CVE-2021-20757 : Vulnerability Insights and Analysis

Cybozu Garoon versions 4.0.0 to 5.0.2 are affected by an operational restrictions bypass vulnerability that allows a remote attacker to alter Portal data without appropriate privilege.

Understanding CVE-2021-20757

This CVE involves a vulnerability in the E-mail component of Cybozu Garoon that could be exploited by a remote authenticated attacker to manipulate Portal data.

What is CVE-2021-20757?

The CVE-2021-20757 is an operational restrictions bypass vulnerability in Cybozu Garoon 4.0.0 to 5.0.2, enabling a remote authenticated attacker to modify Portal data without the necessary privilege.

The Impact of CVE-2021-20757

This vulnerability could lead to unauthorized access and manipulation of sensitive Portal data, potentially compromising the integrity and confidentiality of the information stored.

Technical Details of CVE-2021-20757

The technical details of CVE-2021-20757 include:

Vulnerability Description

The vulnerability lies in the E-mail feature of Cybozu Garoon, allowing authenticated attackers to bypass operational restrictions and tamper with Portal data.

Affected Systems and Versions

Cybozu Garoon versions 4.0.0 to 5.0.2 are affected by this vulnerability, exposing them to potential exploitation.

Exploitation Mechanism

Remote authenticated attackers can exploit this vulnerability to alter Portal data by leveraging the operational restrictions bypass issue in the E-mail functionality.

Mitigation and Prevention

To mitigate the risks associated with CVE-2021-20757, consider the following steps:

Immediate Steps to Take

Update Cybozu Garoon to a patched version that addresses this vulnerability.
Monitor and restrict access to sensitive Portal data to authorized personnel only.

Long-Term Security Practices

Regularly update and patch Cybozu Garoon and other software to prevent security vulnerabilities.
Conduct security training for users to identify and report suspicious activities.

Patching and Updates

Ensure timely installation of security patches provided by Cybozu, Inc. to remediate CVE-2021-20757 and enhance the security of your systems.