Improper Authentication Affecting rbd-nbd package, versions <15.2.11.83+g8a15f484c2-3.20.1


Severity

Recommended
0.0
high
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.29% (69th percentile)

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  • Snyk IDSNYK-SLES152-RBDNBD-2681506
  • published14 Apr 2022
  • disclosed4 May 2021

Introduced: 4 May 2021

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

How to fix?

Upgrade SLES:15.2 rbd-nbd to version 15.2.11.83+g8a15f484c2-3.20.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream rbd-nbd package and not the rbd-nbd package as distributed by SLES. See How to fix? for SLES:15.2 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