CVE-2021-3692 : Vulnerability Insights and Analysis

A detailed overview of the vulnerability found in yiisoft/yii2 due to the use of predictable algorithm in random number generator.

Understanding CVE-2021-3692

In this section, we will explore the impact, technical details, and mitigation strategies related to CVE-2021-3692.

What is CVE-2021-3692?

The vulnerability in yiisoft/yii2 is caused by the use of a predictable algorithm in the random number generator, making it susceptible to exploitation by threat actors.

The Impact of CVE-2021-3692

The impact of this vulnerability is significant, with a high CVSS base score of 8.1. It affects confidentiality, integrity, and availability, posing a risk to the security of systems utilizing yiisoft/yii2.

Technical Details of CVE-2021-3692

Let's delve into the technical aspects of CVE-2021-3692 to better understand the vulnerability.

Vulnerability Description

The vulnerability arises from the predictable nature of the random number generator algorithm utilized in yiisoft/yii2, allowing malicious entities to exploit it for potential attacks.

Affected Systems and Versions

The vulnerability affects versions of yiisoft/yii2 less than or equal to 2.0.42.1, specifically those with custom version types.

Exploitation Mechanism

The vulnerability can be exploited remotely with a high attack complexity, making it a critical security concern for systems using the affected versions of yiisoft/yii2.

Mitigation and Prevention

In this section, we will discuss the steps that can be taken to mitigate the risks associated with CVE-2021-3692.

Immediate Steps to Take

Users are advised to update their yiisoft/yii2 installation to a patched version to address the vulnerability. Additionally, monitoring for any suspicious activities is crucial to prevent exploitation.

Long-Term Security Practices

Implementing strong random number generation practices, regular security audits, and keeping systems up to date with the latest security patches are essential for long-term security.

Patching and Updates

Vendor patches and updates should be applied promptly to ensure that the vulnerability is mitigated effectively and that systems remain secure.