Security restrictions bypass in Openstack Keystone

1) Security restrictions bypass

EUVDB-ID: #VU14477

Risk: Low

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

CVE-ID: CVE-2018-14432

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote authenticated attacker to bypass security restrictions on the target system.

The vulnerability exists in the Federation component in Keystone with the /v3/OS-FEDERATION endpoint enabled via policy.json due to an error when handling malicious input. A remote attacker can submit authenticated "GET /v3/OS-FEDERATION/projects" request, bypass intended access restrictions on listing projects and discover projects he has no authority to access, leaking all projects in the deployment and their attributes. 

Mitigation

The vulnerability has been fixed in the versions 11.0.4, 12.0.0, and 13.0.0.

Vulnerable software versions

OpenStack Keystone: 11.0.0 - 12.0.1

External links

http://www.openwall.com/lists/oss-security/2018/07/25/2

Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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