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.
{
"unresolved_ranges": [
{
"vendor_product": "canonical:ubuntu_linux",
"cpes": [
"cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*"
],
"extracted_events": [
{
"introduced": "18.04"
},
{
"last_affected": "18.04"
}
],
"source": "CPE_STRING"
}
]
}{
"cpe": [
"cpe:2.3:a:openstack:keystone:*:*:*:*:*:*:*:*",
"cpe:2.3:a:openstack:keystone:16.0.0:*:*:*:*:*:*:*"
],
"extracted_events": [
{
"introduced": "0"
},
{
"fixed": "15.0.1"
},
{
"introduced": "16.0.0"
},
{
"last_affected": "16.0.0"
}
],
"source": [
"CPE_RANGE",
"CPE_STRING"
]
}