What’s Vulnerable › Vulnerabilities
CVE-2020-12691
- Severity: high (CVSS 8.8 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 4.9% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2020-05-07 · updated 2026-06-17
- Weakness: CWE-863
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.
Affected products
- Canonical Ubuntu Linux: 18.04
- OpenStack Keystone: before 15.0.1; 16.0.0 — fixed in 15.0.1
How to fix
Upgrade to a fixed version: OpenStack Keystone 15.0.1. Check the vendor advisory for mitigations.
References
- http://www.openwall.com/lists/oss-security/2020/05/07/2
- https://bugs.launchpad.net/keystone/+bug/1872733
- https://lists.apache.org/thread.html/re237267da268c690df5e1c6ea6a38a7fc11617725e8049490f58a6fa%40%3Ccommits.druid.apache.org%3E
- https://lists.apache.org/thread.html/re4ffc55cd2f1b55a26e07c83b3c22c3fe4bae6054d000a57fb48d8c2%40%3Ccommits.druid.apache.org%3E
- https://security.openstack.org/ossa/OSSA-2020-004.html
- https://usn.ubuntu.com/4480-1/
- https://www.openwall.com/lists/oss-security/2020/05/06/5
- http://www.openwall.com/lists/oss-security/2020/05/07/2
- https://bugs.launchpad.net/keystone/+bug/1872733
- https://lists.apache.org/thread.html/re237267da268c690df5e1c6ea6a38a7fc11617725e8049490f58a6fa%40%3Ccommits.druid.apache.org%3E
- https://lists.apache.org/thread.html/re4ffc55cd2f1b55a26e07c83b3c22c3fe4bae6054d000a57fb48d8c2%40%3Ccommits.druid.apache.org%3E
- https://security.openstack.org/ossa/OSSA-2020-004.html
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