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CVE-2021-38155

7.5 · HIGH

OpenStack Keystone 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 allows information disclosure during account locking (related to PCI DSS features).

Published Aug 6, 2021CWE-307EPSS 2.48%

Overview

CVE-2021-38155 is a high-severity vulnerability. It was published on August 6, 2021 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

OpenStack Keystone 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 allows information disclosure during account locking (related to PCI DSS features). By guessing the name of an account and failing to authenticate multiple times, any unauthenticated actor could both confirm the account exists and obtain that account's corresponding UUID, which might be leveraged for other unrelated attacks. All deployments enabling security_compliance.lockout_failure_attempts are affected.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refwww.openwall.com/lists/oss-security/2021/08/10/5Reflaunchpad.net/bugs/1688137Reflists.debian.org/debian-lts-announce/2024/01/msg00007.htmlRefsecurity.openstack.org/ossa/OSSA-2021-003.htmlRefwww.openwall.com/lists/oss-security/2021/08/10/5Reflaunchpad.net/bugs/1688137Reflists.debian.org/debian-lts-announce/2024/01/msg00007.htmlRefsecurity.openstack.org/ossa/OSSA-2021-003.html

How CyberStrike helps

Frequently asked questions

What is CVE-2021-38155?

CVE-2021-38155 is a high-severity vulnerability. It was published on August 6, 2021 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2021-38155?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2021-38155?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2021-38155?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-38155 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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