CVE-2021-20653 : Security Advisory and Response

This article provides insights into CVE-2021-20653, a vulnerability affecting Calsos CSDJ products by NEC Platforms, Ltd., allowing remote attackers to bypass access restrictions.

Understanding CVE-2021-20653

This section delves into the key details of the CVE-2021-20653 vulnerability.

What is CVE-2021-20653?

CVE-2021-20653 impacts Calsos CSDJ products, enabling unauthorized access to historical data without proper privileges through unspecified means.

The Impact of CVE-2021-20653

The vulnerability in Calsos CSDJ could be exploited by malicious actors to circumvent access controls and retrieve sensitive data.

Technical Details of CVE-2021-20653

This section explores the technical aspects of the CVE-2021-20653 vulnerability.

Vulnerability Description

Calsos CSDJ versions CSDJ-B 01.08.00 and earlier, CSDJ-H 01.08.00 and earlier, CSDJ-D 01.08.00 and earlier, and CSDJ-A 03.08.00 and earlier are susceptible to unauthorized access, allowing attackers to retrieve historical data.

Affected Systems and Versions

The affected products are Calsos CSDJ by NEC Platforms, Ltd., specifically versions CSDJ-B 01.08.00 and earlier, CSDJ-H 01.08.00 and earlier, CSDJ-D 01.08.00 and earlier, and CSDJ-A 03.08.00 and earlier.

Exploitation Mechanism

Remote attackers can exploit this vulnerability to bypass access restrictions and access historical data without the necessary privileges.

Mitigation and Prevention

This section outlines steps to mitigate and prevent exploitation of CVE-2021-20653.

Immediate Steps to Take

Users are advised to apply security patches promptly and restrict access to vulnerable systems to authorized personnel.

Long-Term Security Practices

Implementing strong access controls, regular security audits, and monitoring can bolster defenses against such vulnerabilities.

Patching and Updates

Regularly updating Calsos CSDJ systems to versions that contain security fixes is crucial to mitigate the risk of unauthorized data access.