CVE-2021-38435 : What You Need to Know

RTI Connext DDS Professional and Connext DDS Secure versions 4.2x to 6.1.0 have a vulnerability where they do not correctly calculate the size when allocating the buffer, potentially leading to a buffer overflow.

Understanding CVE-2021-38435

This CVE involves a calculation error in RTI Connext DDS Professional and Connext DDS Secure versions 4.2x to 6.1.0 that can result in a buffer overflow.

What is CVE-2021-38435?

CVE-2021-38435 refers to the incorrect size calculation issue in RTI Connext DDS Professional and Connext DDS Secure, making them susceptible to buffer overflow.

The Impact of CVE-2021-38435

The vulnerability poses a medium severity risk with a CVSS base score of 6.6. It has a high availability impact but low confidentiality and integrity impacts.

Technical Details of CVE-2021-38435

This section covers the technical aspects of the vulnerability.

Vulnerability Description

RTI Connext DDS Professional and Connext DDS Secure have versions between 4.2x to 6.1.0 that do not properly calculate buffer sizes, resulting in a potential buffer overflow.

Affected Systems and Versions

Impacted systems include RTI Connext DDS Professional and Connext DDS Secure versions from 4.2x to 6.1.0.

Exploitation Mechanism

Attackers can exploit this vulnerability by triggering a buffer overflow due to the miscalculation of buffer sizes.

Mitigation and Prevention

To address CVE-2021-38435, follow these mitigation practices.

Immediate Steps to Take

Users are advised to apply patches provided by RTI to fix the vulnerability. Additionally, consider mitigation techniques such as using RTI DDS Secure to counteract network amplification issues.

Long-Term Security Practices

Establish robust security protocols within your network to prevent buffer overflow and similar vulnerabilities.

Patching and Updates

Regularly monitor for security updates and apply patches promptly to safeguard against known vulnerabilities.