Privilege escalation in OpenStack Keystone
CVE-2020-12689
An issue was discovered in OpenStack Keystone before 15.0.1, and 16.0.0. Any user authenticated within a limited scope (trust/oauth/application credential) can create an EC2 credential with an escalated permission, such as obtaining admin while the user is on a limited viewer role. 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.
Vulnerability class: Privilege Escalation
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.016 (74.9th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 75th percentile — 74.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.016 · newest: 0.016 · change: 0.000
Affected products
- OpenStack Keystone — versions 16.0.0
- Canonical Ubuntu Linux — versions 18.04
Weakness classification (CWE)
References
- security.openstack.org/ossa/OSSA-2020-004.html (Vendor Advisory)
- bugs.launchpad.net/keystone/+bug/1872735 (Patch, Third Party Advisory)
- www.openwall.com/lists/oss-security/2020/05/06/5 (Mailing List, Third Party Advisory)
- www.openwall.com/lists/oss-security/2020/05/07/2 (mailing-list, Mailing List, Third Party Advisory)
- lists.apache.org/thread.html/re4ffc55cd2f1b55a26e07c83b3c22c3fe4bae6054d000a57f… (mailing-list)
- usn.ubuntu.com/4480-1/ (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-12689?
- CVE-2020-12689 is a high-severity vulnerability in OpenStack Keystone, classified under Improper Privilege Management. CVSS score: 8.8/10. Published 2020-05-07.
- How severe is CVE-2020-12689?
- High severity. CVSS v3 base score is 8.8 out of 10.