title: User Impersonation possible in Tanzu SSO
description: Single Sign-On for Vmware Tanzu all versions prior to 1.11.3 ,1.12.x versions prior to 1.12.4 and 1.13.x prior to 1.13.1 are vulnerable to user impersonation attack.If two users are logged in to the SSO operator dashboard at the same time, with the same username, from two different identity providers, one can acquire the token of the other and thus operate with their permissions. Note: Foundation may be vulnerable only if: 1) The system zone is set up to use a SAML identity provider 2) There are internal users that have the same username as users in the external SAML provider 3) Those duplicate-named users have the scope to access the SSO operator dashboard 4) The vulnerability doesn't appear with LDAP because of chained authentication.
problem types: CWE-287: Improper Authentication
affected:
{
product: Single Sign-On for VMware Tanzu
vendor: VMware Tanzu
versions:
lessThan: 1.11.3, status: affected, version: 1.11, versionType: custom
lessThan: 1.12.4, status: affected, version: 1.12, versionType: custom
lessThan: 1.13.1, status: affected, version: 1.13, versionType: custom
}
metrics:
cvssV3_0: [
attackComplexity: HIGH
attackVector: NETWORK
availabilityImpact: HIGH
baseScore: 7.5
baseSeverity: HIGH
confidentialityImpact: LOW
integrityImpact: HIGH
privilegesRequired: HIGH
scope: CHANGED
userInteraction: REQUIRED
vectorString: CVSS:3.0/AV:N/AC:H/PR:H/UI:R/S:C/C:L/I:H/A:H
version: 3.0
]