CVE-2021-4248 : Security Advisory and Response

A vulnerability was found in kapetan dns up to version 6.1.0, affecting the file DNS/Protocol/Request.cs. The issue leads to insufficient entropy in PRNG, allowing remote attacks. Upgrading to version 7.0.0 with patch identifier cf7105aa2aae90d6656088fe5a8ee1d5730773b6 is recommended to address this problem.

Understanding CVE-2021-4248

This section provides insights into the impact and technical details of CVE-2021-4248.

What is CVE-2021-4248?

CVE-2021-4248 is a vulnerability in kapetan dns up to version 6.1.0, resulting in insufficient entropy in the PRNG mechanism, potentially exploited remotely.

The Impact of CVE-2021-4248

The vulnerability allows attackers to manipulate entropy in PRNG, posing risks to the confidentiality, integrity, and availability of the affected systems.

Technical Details of CVE-2021-4248

Explore the vulnerability description, affected systems, and exploitation mechanism for CVE-2021-4248.

Vulnerability Description

The vulnerability arises due to insufficient entropy in the PRNG mechanism within the file DNS/Protocol/Request.cs.

Affected Systems and Versions

kapetan dns versions 6.0 and 6.1 are impacted by CVE-2021-4248, leading to potential exploitation of insufficient entropy in the PRNG.

Exploitation Mechanism

Attackers can exploit the vulnerability remotely by manipulating entropy in the PRNG mechanism of the kapetan dns component.

Mitigation and Prevention

Learn about the immediate steps and long-term practices to mitigate and prevent CVE-2021-4248.

Immediate Steps to Take

To address CVE-2021-4248, upgrade the kapetan dns component to version 7.0.0, which includes the necessary patch (cf7105aa2aae90d6656088fe5a8ee1d5730773b6).

Long-Term Security Practices

Implement robust entropy management practices and stay updated on security patches and version upgrades to prevent similar vulnerabilities.

Patching and Updates

Regularly check for security updates and follow best practices to keep software components secure.