CVE-2021-39056 Explained : Impact and Mitigation

This CVE-2021-39056 article provides detailed information about a vulnerability in IBM i versions 7.1, 7.2, 7.3, and 7.4, allowing a remote authenticated user to cause a denial of service.

Understanding CVE-2021-39056

This section delves into the specifics of the CVE-2021-39056 vulnerability.

What is CVE-2021-39056?

The IBM i 7.1, 7.2, 7.3, and 7.4 Extended Dynamic Remote SQL server (EDRSQL) vulnerability enables a remote authenticated user to trigger a denial of service attack by sending a specially crafted request.

The Impact of CVE-2021-39056

The vulnerability's CVSS 3.0 base score is 6.5 (Medium severity) with high availability impact. The attack complexity is low, and exploit code maturity is unproven.

Technical Details of CVE-2021-39056

Explore the technical aspects of the CVE-2021-39056 vulnerability.

Vulnerability Description

The flaw in IBM i versions 7.1 to 7.4 allows remote authenticated users to disrupt service by sending crafted requests.

Affected Systems and Versions

Product: IBM i
Versions: 7.1, 7.2, 7.3, 7.4

Exploitation Mechanism

The vulnerability requires a remote authenticated user to send a specifically crafted request to exploit the Extended Dynamic Remote SQL server flaw.

Mitigation and Prevention

Learn how to mitigate and prevent issues related to CVE-2021-39056.

Immediate Steps to Take

Apply the official fix provided by IBM to address the vulnerability.
Monitor system logs for any suspicious activities.

Long-Term Security Practices

Regularly update and patch IBM i systems to prevent known vulnerabilities.
Conduct regular security audits and penetration testing to identify and address potential weaknesses.

Patching and Updates

Stay informed about security bulletins and updates from IBM regarding the IBM i EDRSQL vulnerability.