CVE-2021-29842 : Vulnerability Insights and Analysis

IBM WebSphere Application Server and WebSphere Application Server Liberty are affected by a vulnerability that could allow remote attackers to enumerate usernames. Here's what you need to know about CVE-2021-29842.

Understanding CVE-2021-29842

This section dives into the details of the CVE-2021-29842 vulnerability, its impact, affected systems, and exploitation mechanism.

What is CVE-2021-29842?

CVE-2021-29842 affects IBM WebSphere Application Server versions 7.0, 8.0, 8.5, 9.0, and WebSphere Application Server Liberty versions 17.0.0.3 through 21.0.0.9. The vulnerability allows a remote user to enumerate usernames by exploiting differences in responses from valid and invalid login attempts.

The Impact of CVE-2021-29842

The CVSSv3.0 base score for CVE-2021-29842 is 3.7 with a severity level of Low. The attack complexity is rated as High with an attack vector of Network. Although the exploit code maturity is unproven, immediate action is recommended for mitigation.

Technical Details of CVE-2021-29842

Let's explore the technical aspects of the CVE-2021-29842 vulnerability in more detail.

Vulnerability Description

The vulnerability in IBM WebSphere Application Server and WebSphere Application Server Liberty could lead to information disclosure by remote attackers enumerating usernames.

Affected Systems and Versions

IBM products affected include WebSphere Application Server versions 7.0, 8.0, 8.5, 9.0, and WebSphere Application Server Liberty versions 17.0.0.3 through 21.0.0.9.

Exploitation Mechanism

Remote attackers can exploit this vulnerability by differentiating responses from successful and unsuccessful login attempts, allowing them to collect valid usernames.

Mitigation and Prevention

Discover the steps to mitigate and prevent the CVE-2021-29842 vulnerability from impacting your systems.

Immediate Steps to Take

IBM recommends applying the official fix or patch provided to address the vulnerability promptly.

Long-Term Security Practices

Implement security best practices, such as using strong authentication mechanisms and monitoring login attempts to detect suspicious activities.

Patching and Updates

Regularly update your IBM WebSphere Application Server and Liberty installations to the latest versions to incorporate security patches and enhanced protection against CVE-2021-29842.