CVE-2023-42820 : What You Need to Know

This article provides detailed information about CVE-2023-42820, a vulnerability related to random seed leakage in Jumpserver.

Understanding CVE-2023-42820

This section delves into what CVE-2023-42820 entails and its potential impact.

What is CVE-2023-42820?

CVE-2023-42820 involves the exposure of sensitive information due to random seed leakage in Jumpserver, potentially leading to password reset vulnerabilities.

The Impact of CVE-2023-42820

The vulnerability in Jumpserver could allow unauthorized actors to replay randomly generated verification codes, potentially resulting in password resets. However, users with MFA enabled are not affected, and those not using local authentication are also unaffected.

Technical Details of CVE-2023-42820

This section outlines the specific technical details of the CVE-2023-42820 vulnerability.

Vulnerability Description

JumpServer, an open-source bastion host, exposes the random number seed to the API, making it possible for attackers to replay verification codes and exploit password reset mechanisms.

Affected Systems and Versions

The vulnerability impacts Jumpserver versions ranging from >= 2.24 to < 2.28.19 and versions >= 3.0.0 to < 3.6.5.

Exploitation Mechanism

Attackers can exploit the random seed leakage in Jumpserver to replay verification codes and potentially compromise password reset mechanisms.

Mitigation and Prevention

In this section, we discuss the steps to mitigate the CVE-2023-42820 vulnerability and prevent exploitation.

Immediate Steps to Take

Users are strongly advised to upgrade to either version 2.28.19 or version 3.6.5 to address the vulnerability effectively.

Long-Term Security Practices

Implementing multi-factor authentication (MFA) and avoiding local authentication can reduce the risk associated with CVE-2023-42820 in the long term.

Patching and Updates

Regularly applying security patches and updates provided by Jumpserver is essential to ensure ongoing protection against vulnerabilities.