Improper Authentication Affecting ceph package, versions <16.2.1-0ubuntu1


Severity

Recommended
medium

Based on Ubuntu security rating.

Threat Intelligence

EPSS
0.19% (58th percentile)

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  • Snyk IDSNYK-UBUNTU2204-CEPH-2776762
  • published21 May 2021
  • disclosed15 Apr 2021

Introduced: 15 Apr 2021

CVE-2021-20288  (opens in a new tab)
CWE-287  (opens in a new tab)

How to fix?

Upgrade Ubuntu:22.04 ceph to version 16.2.1-0ubuntu1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream ceph package and not the ceph package as distributed by Ubuntu. See How to fix? for Ubuntu:22.04 relevant fixed versions and status.

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.

CVSS Scores

version 3.1