CVE-2012-5571

Description

A flaw was found in OpenStack Keystone. This vulnerability allows remote authenticated users to bypass intended authorization restrictions. This occurs because OpenStack Keystone does not properly handle EC2 (Elastic Compute Cloud) tokens when a user's role has been removed from a tenant. An attacker can leverage a token associated with a removed user role to gain unauthorized access.

Metrics

CVSS 3.1

5.4 (MEDIUM) Score source: CNA CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

EPSS — exploit probability

2% (percentile: 81) as of 1 November 2026

CWE

CWE-639, CWE-255

Affected products

openstack: essex; openstack: folsom

References

• http://secunia.com/advisories/51423 Vendor Advisory
• http://secunia.com/advisories/51436 Vendor Advisory
• http://secunia.com/advisories/51423 Vendor Advisory
• http://secunia.com/advisories/51436 Vendor Advisory
• http://www.openwall.com/lists/oss-security/2012/11/28/5 Patch
• http://www.openwall.com/lists/oss-security/2012/11/28/6 Patch
• https://bugs.launchpad.net/keystone/+bug/1064914 Patch
• https://github.com/openstack/keystone/commit/37308dd4f3e33f7bd0f71d83fd51734d18… Patch
• https://github.com/openstack/keystone/commit/8735009dc5b895db265a1cd573f39f4acf… Patch
• https://github.com/openstack/keystone/commit/9d68b40cb9ea818c48152e6c712ff41586… Patch