CVE-2020-12691
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (4.92%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 4.92% probability · 92th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-863
- Affected
- openstack/keystone · canonical/ubuntu linux
- Source
- cve@mitre.org
References
- http://www.openwall.com/lists/oss-security/2020/05/07/2Mailing List, Third Party Advisory
- https://bugs.launchpad.net/keystone/+bug/1872733Patch, Third Party Advisory
- 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.htmlVendor Advisory
- https://usn.ubuntu.com/4480-1/Third Party Advisory
- https://www.openwall.com/lists/oss-security/2020/05/06/5Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2020/05/07/2Mailing List, Third Party Advisory
- https://bugs.launchpad.net/keystone/+bug/1872733Patch, Third Party Advisory
- 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.htmlVendor Advisory
- https://usn.ubuntu.com/4480-1/Third Party Advisory
- https://www.openwall.com/lists/oss-security/2020/05/06/5Mailing List, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.