Authentication bypass in Red Hat Ceph Storage

1) Improper Authentication

EUVDB-ID: #VU53692

Risk: Medium

CVSSv3.1: 6.3 [CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-20288

CWE-ID: CWE-287 - Improper Authentication

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass authentication process.

The vulnerability exists due to an error in authentication flow related to CEPHX_GET_AUTH_SESSION_KEY requests. The application does not check other_keys and allows key reuse. A remote 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.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

ceph-ansible (Red Hat package): 3.2.15-1.el7cp - 3.2.56-1.el7cp

ceph (Red Hat package): 12.2.12-45.el7cp - 12.2.12-139.el7cp

Red Hat Ceph Storage: 3

External links

http://access.redhat.com/errata/RHSA-2022:1394

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated privileged user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.