Authentication bypass in Red Hat Ceph Storage



Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2021-20288
CWE-ID CWE-287
Exploitation vector Network
Public exploit N/A
Vulnerable software
 Ceph
Server applications / Other server solutions

ceph-ansible (Red Hat package)
Operating systems & Components / Operating system package or component

Red Hat Ceph Storage
Server applications / File servers (FTP/HTTP)

Vendor Red Hat Inc.

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Improper Authentication

EUVDB-ID: #VU53692

Risk: Medium

CVSSv4.0: 6.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

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: 12.2.12-45.el7cp - 12.2.12-139.el7cp

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

Red Hat Ceph Storage: 3

CPE2.3 External links

https://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.



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