CVE-2021-32963 : Security Advisory and Response

CVE-2021-32963, discovered on August 19, 2021, involves a Null pointer dereference in SuiteLink server while processing commands 0x03/0x10. This vulnerability has a CVSS base score of 7.5 (High severity).

Understanding CVE-2021-20657

This section will provide an insight into the nature of the CVE and its impact.

What is CVE-2021-20657?

CVE-2021-32963 is a vulnerability that allows attackers to cause a denial of service via a NULL pointer dereference issue in the SuiteLink server.

The Impact of CVE-2021-20657

The vulnerability poses a high availability impact, with a low attack complexity. This makes it crucial to address to prevent potential exploitation by threat actors.

Technical Details of CVE-2021-20657

Let's analyze the technical aspects of CVE-2021-20657.

Vulnerability Description

The vulnerability stems from a null pointer dereference in the SuiteLink server when processing specific commands, leading to a potential denial of service.

Affected Systems and Versions

The vulnerability affects various products from AVEVA Software, LLC, including AVEVA System Platform 2020, InTouch 2020, Historian 2020, Communication Drivers Pack 2020, Batch Management 2020, and MES 2014, up to specific versions.

Exploitation Mechanism

Exploiting this vulnerability requires network access and can result in a high impact on system availability without requiring any special privileges.

Mitigation and Prevention

Find out how to address and prevent the CVE-2021-32963 vulnerability.

Immediate Steps to Take

It is recommended for organizations to apply the provided security update to mitigate the vulnerability. Evaluation based on the operational environment and implementation is advised.

Long-Term Security Practices

Apart from immediate patching, organizations should follow robust security practices, including regular security assessments and monitoring, to enhance overall cybersecurity posture.

Patching and Updates

Organizations using affected AVEVA products should refer to security bulletin AVEVA-2021-003 for detailed guidance on applying the necessary patches and updates.