CVE-2021-31228 : Security Advisory and Response

An issue was discovered in HCC embedded InterNiche 4.0.1 that allows attackers to predict a DNS query's source port, enabling the sending of forged DNS response packets without sniffing the specific request. This vulnerability is exploitable due to predictable data based on time of day and not enough bits.

Understanding CVE-2021-31228

This CVE highlights a critical vulnerability in HCC embedded InterNiche 4.0.1 that can be exploited by attackers to manipulate DNS response packets.

What is CVE-2021-31228?

The CVE-2021-31228 vulnerability in HCC embedded InterNiche 4.0.1 allows malicious actors to predict a DNS query's source port and send malicious DNS response packets, posing a serious security threat.

The Impact of CVE-2021-31228

This vulnerability can lead to forged DNS response packets being accepted as valid answers by DNS clients, potentially resulting in unauthorized access and data breach incidents.

Technical Details of CVE-2021-31228

The technical details of CVE-2021-31228 shed light on the specific aspects of the vulnerability that enhance understanding and highlight its severity.

Vulnerability Description

The vulnerability enables attackers to predict the source port of a DNS query, facilitating the transmission of malicious DNS response packets without intercepting the actual request.

Affected Systems and Versions

The affected system is HCC embedded InterNiche 4.0.1, making it crucial for organizations using this version to take immediate action to mitigate the risk.

Exploitation Mechanism

Exploiting CVE-2021-31228 involves predicting the source port of a DNS query to send forged DNS response packets, taking advantage of the vulnerability's predictable data attributes.

Mitigation and Prevention

Understanding mitigation strategies and preventive measures is essential to protect systems and data from potential exploits.

Immediate Steps to Take

Organizations are advised to apply security patches, update affected systems, and implement network monitoring to detect any suspicious activities related to DNS responses.

Long-Term Security Practices

Establishing robust network security protocols, conducting regular security audits, and educating users on DNS-related security risks are crucial for long-term security.

Patching and Updates

Regularly checking for security updates, applying patches promptly, and staying informed about emerging vulnerabilities are key best practices to prevent exploitation of CVE-2021-31228.