CVE-2012-5571: Openstack keystone: openstack keystone: authorization bypass via improper ec2 token handling

Severity: low (CVSS 3.5 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2012-12-18 · updated 2026-06-16
Weakness: CWE-639

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.

Affected products

OpenStack Essex: 2012.1
OpenStack Folsom: 2012.2

References

http://lists.fedoraproject.org/pipermail/package-announce/2012-December/094286.html
http://rhn.redhat.com/errata/RHSA-2012-1556.html
http://rhn.redhat.com/errata/RHSA-2012-1557.html
http://secunia.com/advisories/51423
http://secunia.com/advisories/51436
http://www.openwall.com/lists/oss-security/2012/11/28/5
http://www.openwall.com/lists/oss-security/2012/11/28/6
http://www.securityfocus.com/bid/56726
http://www.ubuntu.com/usn/USN-1641-1
https://access.redhat.com/security/cve/CVE-2012-5571
https://bugs.launchpad.net/keystone/+bug/1064914
https://exchange.xforce.ibmcloud.com/vulnerabilities/80333

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