Description
An issue was discovered in OpenStack Keystone before 15.0.1, and 16.0.0. Any authenticated user can create an EC2 credential for themselves for a project that they have a specified role on, and then perform an update to the credential user and project, allowing them to masquerade as another user. This potentially allows a malicious user to act as the admin on a project another user has the admin role on, which can effectively grant that user global admin privileges.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | keystone | 2:17.0.0~rc2-1 | — |
| Debian 13 | keystone | 2:17.0.0~rc2-1 | — |
| Debian 12 | keystone | 2:17.0.0~rc2-1 | — |
| Debian 10 | keystone | 2:14.2.0-0+deb10u1 | DSA-4679-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | keystone | 2:13.0.4-0ubuntu1 | USN-4480-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 16.04 LTS | keystone | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat OpenStack 16 | python3-keystone +1 | 1:16.0.1-0.20200511063421.40cbb7b.el8ost | RHSA-2020:3105 |
| Red Hat OpenStack 15 | python3-keystone +1 | 1:15.0.1-0.20200512110437.95b2bbe.el8ost | RHSA-2020:3102 |
| Red Hat OpenStack 13 | python-keystone +1 | 1:13.0.4-3.el7ost | RHSA-2020:2732 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat OpenStack 10 | python-keystone +2 | 1:10.0.3-8.el7ost | RHSA-2020:3096 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| PyPI | keystone | < 15.0.1 | 15.0.1 | GHSA-4427-7f3w-mqv6 |
| PyPI | keystone | >= 16.0.0, < 16.0.1 | 16.0.1 | GHSA-4427-7f3w-mqv6 |
Advisories 6
- RHSA-2020:3102 Red Hat Security Advisory: openstack-keystone security update Red Hat Security Advisories (RHSA) · Aug 5, 2026
- RHSA-2020:3105 Red Hat Security Advisory: openstack-keystone security update Red Hat Security Advisories (RHSA) · Aug 5, 2026
- RHSA-2020:3096 Red Hat Security Advisory: openstack-keystone security update Red Hat Security Advisories (RHSA) · Aug 5, 2026
- RHSA-2020:2732 Red Hat Security Advisory: openstack-keystone security update Red Hat Security Advisories (RHSA) · Aug 5, 2026
- USN-4480-1 keystone vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- DSA-4679-1 keystone - security update Debian Security (DSA / DLA) · Mar 9, 2026
References
- https://security.openstack.org/ossa/OSSA-2020-004.html
- https://www.openwall.com/lists/oss-security/2020/05/06/5
- https://bugs.launchpad.net/keystone/+bug/1872733
- [oss-security] 20200507 Re: [OSSA-2020-004] Keystone: Keystone credential endpoints allow owner modification and are not protected from a scoped context (CVE PENDING) mailing-list
- [druid-commits] 20200520 [GitHub] [druid] ccaominh opened a new pull request #9903: Suppress CVEs for openstack-keystone mailing-list
- USN-4480-1 vendor-advisory
- [druid-commits] 20210712 [druid] branch master updated: Suppress CVE-2021-27568 from json-smart 2.3 dependency (#11438) mailing-list