CVE-2021-21777 : Vulnerability Insights and Analysis

An information disclosure vulnerability exists in the Ethernet/IP UDP handler functionality of EIP Stack Group OpENer 2.3 and development commit 8c73bf3, leading to an out-of-bounds read.

Understanding CVE-2021-21777

This section provides an overview of CVE-2021-21777, highlighting its impact, technical details, and mitigation strategies.

What is CVE-2021-21777?

CVE-2021-21777 is an information disclosure vulnerability in the Ethernet/IP UDP handler functionality of EIP Stack Group OpENer 2.3 and development commit 8c73bf3. It can be exploited through a specially crafted network request.

The Impact of CVE-2021-21777

The vulnerability has a CVSS base score of 8.6, indicating a high severity risk. It can lead to an out-of-bounds read, potentially exposing sensitive information and impacting the availability of affected systems.

Technical Details of CVE-2021-21777

In this section, we delve into the specifics of the vulnerability, including its description, affected systems, versions, and exploitation mechanism.

Vulnerability Description

The vulnerability allows attackers to trigger an out-of-bounds read via manipulated network requests, compromising data integrity and system availability.

Affected Systems and Versions

EIP Stack Group OpENer 2.3 and development commit 8c73bf3 are confirmed to be impacted by this vulnerability, posing a risk to systems utilizing these versions.

Exploitation Mechanism

Exploiting CVE-2021-21777 involves crafting malicious network requests to trigger the out-of-bounds read, potentially leading to unauthorized access to sensitive information.

Mitigation and Prevention

To safeguard systems against CVE-2021-21777, immediate actions and long-term security practices should be implemented to mitigate risks and prevent exploitation.

Immediate Steps to Take

Organizations should apply security patches, network segmentation, and monitor network traffic to detect and prevent unauthorized access attempts exploiting the vulnerability.

Long-Term Security Practices

Implementing secure coding practices, conducting regular security audits, and educating personnel on cybersecurity best practices can enhance the overall security posture and resilience of systems.

Patching and Updates

Vendors are advised to release patches addressing the vulnerability promptly. Users should regularly check for updates and apply patches to eliminate the risk posed by CVE-2021-21777.