CVE-2021-45489 : Exploit Details and Defense Strategies

In NetBSD through 9.2, the IPv6 Flow Label generation algorithm employs a weak cryptographic PRNG.

Understanding CVE-2021-45489

In this CVE, a vulnerability exists in NetBSD through version 9.2 related to the IPv6 Flow Label generation algorithm.

What is CVE-2021-45489?

The issue with this CVE is that the IPv6 Flow Label generation algorithm in NetBSD up to version 9.2 uses a weak cryptographic PRNG, which can lead to security risks.

The Impact of CVE-2021-45489

The utilization of a weak cryptographic PRNG in the IPv6 Flow Label generation algorithm can potentially compromise the security of the affected systems, allowing attackers to exploit this vulnerability.

Technical Details of CVE-2021-45489

In-depth technical information about the CVE.

Vulnerability Description

The vulnerability stems from the usage of a weak cryptographic PRNG in the IPv6 Flow Label generation algorithm in NetBSD up to version 9.2.

Affected Systems and Versions

Product: Not applicable
Vendor: Not applicable
Versions affected: Not applicable

Exploitation Mechanism

Exploiting this vulnerability is possible through manipulation of the weak cryptographic PRNG used in the IPv6 Flow Label generation algorithm.

Mitigation and Prevention

Actions to mitigate and prevent the CVE issue.

Immediate Steps to Take

Update NetBSD to a version that includes a fix for the weak cryptographic PRNG in the IPv6 Flow Label generation algorithm.
Implement network controls to monitor and detect any malicious activity exploiting this vulnerability.

Long-Term Security Practices

Regularly update and patch the NetBSD operating system to ensure the latest security fixes are applied.
Conduct security assessments and penetration testing to identify and address any weaknesses in the network.

Patching and Updates

Apply patches and updates provided by NetBSD to fix the vulnerability in the IPv6 Flow Label generation algorithm.