Vulnerability identifier: #VU53693

Vulnerability risk: Low

CVSSv3.1: 5.5 [CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-27781

CWE-ID: CWE-522

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Ceph
Server applications / Other server solutions

Vendor: Red Hat Inc.

Description

The vulnerability allows a local user to gain access to credentials of other application users.

The vulnerability exists due to the way credentials sharing is implemented. User credentials can be manipulated and stolen by Native CephFS consumers of OpenStack Manila, resulting in potential privilege escalation. An Open Stack Manila user can request access to a share to an arbitrary cephx user, including existing users. The access key is retrieved via the interface drivers. Then, all users of the requesting OpenStack project can view the access key. This enables the attacker to target any resource that the user has access to. This can be done to even "admin" users, compromising the ceph administrator.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Ceph: 14.0.0 - 16.1.0

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External links
http://bugzilla.redhat.com/show_bug.cgi?id=1900109
http://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZJ7FFROL25FYRL6FMI33VRKOD74LINRP/
http://security.gentoo.org/glsa/202105-39

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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