Incorrect authorization in OpenStack Keystone - CVE-2025-65073

Vulnerability identifier: #VU118095

CSH Severity: Critical

CVSS v4: 9.4 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N]

CVE-ID: CVE-2025-65073

CWE-ID: CWE-863

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to gain access to sensitive information.

The vulnerability exists due to incorrect authorization checks within the ec2tokens and s3tokens API endpoints. A remote non-authenticated attacker can send a valid AWS Signature (e.g., from a presigned S3 URL) and obtain Keystone authorization (ec2tokens can yield a fully scoped token; s3tokens can reveal scope accepted by some services), resulting in unauthorized access and code execution.

Deployments where /v3/ec2tokens or /v3/s3tokens are reachable by unauthenticated clients (e.g., exposed on a public API) are affected.

OpenStack Keystone
Red Hat OpenStack
Ubuntu
openstack-swift (Red Hat package)
openstack-keystone (Red Hat package)
keystone (Ubuntu package)
openstack-tempest (Red Hat package)

Install updates from vendor's website.

OpenStack Keystone - update to 27.0.0
openstack-swift (Red Hat package) - update to 2.27.1-17.1.20231004180819.el9ost
Red Hat OpenStack - update to 17.1
openstack-keystone (Red Hat package) - addressed in versions 19.0.2-17.1.20260529190847.54dd95d.el9ost, 23.0.3-18.0.20241202141842.9e3dfb4.el9ost
keystone (Ubuntu package) - addressed in versions 2:21.0.1-0ubuntu2.1, 2:25.0.0-0ubuntu1.1, 2:27.0.0-0ubuntu1.1, 2:28.0.0-0ubuntu1.1
openstack-tempest (Red Hat package) - update to 33.0.0-17.1.20260406141650.1580f6f.el9ost

• https://security.openstack.org/ossa/OSSA-2025-002.html

• Incorrect authorization in OpenStack Keystone
• Ubuntu update for keystone
• Ubuntu update for keystone
• Red Hat OpenStackServices on OpenShift 18 update for openstack-keystone
• Multiple vulnerabilities in Red Hat OpenStack 17.1 packages