CVE-2021-20630 : What You Need to Know

This article provides detailed information about CVE-2021-20630, addressing an improper access control vulnerability in Phone Messages of Cybozu Office versions 10.0.0 to 10.8.4, allowing authenticated attackers to bypass access restrictions and obtain Phone Messages data through unspecified vectors.

Understanding CVE-2021-20630

CVE-2021-20630 is a security vulnerability in Cybozu Office that impacts versions 10.0.0 to 10.8.4. The vulnerability specifically lies in the Phone Messages feature, enabling authenticated attackers to circumvent access controls and access sensitive data.

What is CVE-2021-20630?

The CVE-2021-20630 vulnerability pertains to an improper access control issue within the Phone Messages component of Cybozu Office versions 10.0.0 to 10.8.4. This flaw allows attackers with authenticated access to surpass access restrictions and retrieve Phone Messages data using unspecified methods.

The Impact of CVE-2021-20630

The impact of CVE-2021-20630 is significant as it enables malicious actors with valid credentials to escalate privileges and access sensitive Phone Messages information. This could lead to unauthorized disclosure of confidential communication data and compromise user privacy.

Technical Details of CVE-2021-20630

Here are the technical aspects associated with CVE-2021-20630:

Vulnerability Description

The vulnerability involves improper access control mechanisms in Phone Messages of Cybozu Office 10.0.0 to 10.8.4, allowing authenticated attackers to bypass restrictions and extract Phone Messages data.

Affected Systems and Versions

Cybozu Office versions 10.0.0 to 10.8.4 are affected by this vulnerability in the Phone Messages module.

Exploitation Mechanism

Attackers exploit this vulnerability by leveraging authenticated access to the Phone Messages feature and utilizing undisclosed methods to retrieve sensitive data.

Mitigation and Prevention

To mitigate the risks associated with CVE-2021-20630, users and organizations should take the following steps:

Immediate Steps to Take

Upgrade Cybozu Office to a patched version that addresses the access control vulnerability.
Regularly monitor Phone Messages activity for any unauthorized access or data extraction.

Long-Term Security Practices

Implement a least privilege access control model to restrict user permissions and access rights.
Conduct regular security assessments and penetration testing to identify and address similar vulnerabilities.

Patching and Updates

Ensure timely installation of security patches and updates released by Cybozu, Inc. for Cybozu Office to remediate CVE-2021-20630 and enhance overall system security.