# CVE-2012-5571

## Summary

- **CVE ID:** CVE-2012-5571
- **Severity:** MEDIUM
- **CVSS Score:** 5.4 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N)
- **CWE:** CWE-639
- **Published:** Dec 18, 2012
- **Last Modified:** Apr 7, 2026

## Description

OpenStack Keystone Essex (2012.1) and Folsom (2012.2) does not properly handle EC2 tokens when the user role has been removed from a tenant, which allows remote authenticated users to bypass intended authorization restrictions by leveraging a token for the removed user role.

## Affected Products

- n/a — n/a (n/a)

## References

- [CNA](https://github.com/openstack/keystone/commit/8735009dc5b895db265a1cd573f39f4acfca2a19)
- [CNA](http://rhn.redhat.com/errata/RHSA-2012-1557.html)
- [CNA](http://rhn.redhat.com/errata/RHSA-2012-1556.html)
- [CNA](http://www.openwall.com/lists/oss-security/2012/11/28/5)
- [CNA](http://www.ubuntu.com/usn/USN-1641-1)
- [CNA](https://exchange.xforce.ibmcloud.com/vulnerabilities/80333)
- [CNA](https://github.com/openstack/keystone/commit/37308dd4f3e33f7bd0f71d83fd51734d1870713b)
- [CNA](https://bugs.launchpad.net/keystone/+bug/1064914)
- [CNA](http://www.openwall.com/lists/oss-security/2012/11/28/6)
- [CNA](https://github.com/openstack/keystone/commit/9d68b40cb9ea818c48152e6c712ff41586ad9653)
- [CNA](http://secunia.com/advisories/51423)
- [CNA](http://www.securityfocus.com/bid/56726)
- [CNA](http://secunia.com/advisories/51436)
- [CNA](http://lists.fedoraproject.org/pipermail/package-announce/2012-December/094286.html)
- [CNA](https://access.redhat.com/security/cve/CVE-2012-5571)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.17%
- **EPSS Percentile:** 38.7

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-17._