CVE-2021-38155 : What You Need to Know

This CVE record pertains to an information disclosure vulnerability in OpenStack Keystone versions before certain updates, allowing unauthorized actors to obtain account information through account locking.

Understanding CVE-2021-38155

This section provides an insight into the details and impacts of CVE-2021-38155.

What is CVE-2021-38155?

CVE-2021-38155 is a vulnerability in OpenStack Keystone versions prior to specific releases that enables unauthorized actors to gather account details through a process involving account locking.

The Impact of CVE-2021-38155

The vulnerability allows unauthenticated actors to confirm account existence and obtain the corresponding UUID by guessing the account name and failing authentication multiple times, potentially leading to further security threats.

Technical Details of CVE-2021-38155

In this section, the technical aspects of the CVE-2021-38155 vulnerability are explained.

Vulnerability Description

The vulnerability in OpenStack Keystone versions facilitates information disclosure when attempting to lock an account, potentially exposing sensitive data.

Affected Systems and Versions

Vendor: n/a
Product: n/a
Affected Versions: Keystone versions 10.x through 16.x before 16.0.2, 17.x before 17.0.1, 18.x before 18.0.1, and 19.x before 19.0.1

Exploitation Mechanism

The vulnerability can be exploited by unauthorized individuals through a process involving guessing account names and failing authentication attempts, leading to the disclosure of account UUIDs.

Mitigation and Prevention

This section offers insights into mitigating the risks associated with CVE-2021-38155.

Immediate Steps to Take

Update OpenStack Keystone to versions 16.0.2, 17.0.1, 18.0.1, or 19.0.1.
Monitor for any unusual account activity that may indicate exploitation attempts.

Long-Term Security Practices

Implement multi-factor authentication to enhance access security.
Regularly review and audit account locking settings and policies to prevent unauthorized access.

Patching and Updates

Ensure that the OpenStack Keystone deployment is promptly updated to the latest patched versions to mitigate the vulnerability and enhance system security.