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CVE-2021-20288

7.2 · HIGH

An authentication flaw was found in ceph in versions before 14.2.20.

Published Apr 15, 2021CWE-287EPSS 2.13%

Overview

CVE-2021-20288 is a high-severity vulnerability. It was published on April 15, 2021 and has a CVSS 3.1 base score of 7.2 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.2, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

An authentication flaw was found in ceph in versions before 14.2.20. When the monitor handles CEPHX_GET_AUTH_SESSION_KEY requests, it doesn't sanitize other_keys, allowing key reuse. An attacker who can request a global_id can exploit the ability of any user to request a global_id previously associated with another user, as ceph does not force the reuse of old keys to generate new ones. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

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

Refbugzilla.redhat.com/show_bug.cgi?id=1938031Reflists.debian.org/debian-lts-announce/2023/10/msg00034.htmlReflists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/362CEPPYF3YMJZBEJQUT3KDE2EHYYIYQ/Reflists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5BPIAYTRCWAU4XWCDBK2THEFVXSC4XGK/Reflists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JVWUKUUS5BCIFWRV3JCUQMAPJ4HIWSED/Refsecurity.gentoo.org/glsa/202105-39Refbugzilla.redhat.com/show_bug.cgi?id=1938031Reflists.debian.org/debian-lts-announce/2023/10/msg00034.htmlReflists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/362CEPPYF3YMJZBEJQUT3KDE2EHYYIYQ/Reflists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5BPIAYTRCWAU4XWCDBK2THEFVXSC4XGK/

How CyberStrike helps

Frequently asked questions

What is CVE-2021-20288?

CVE-2021-20288 is a high-severity vulnerability. It was published on April 15, 2021 and has a CVSS 3.1 base score of 7.2 (HIGH).

How severe is CVE-2021-20288?

This vulnerability has a CVSS 3.1 base score of 7.2, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2021-20288?

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-2021-20288?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-20288 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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