HP Security Bulletin HPSBGN03527 1 - A potential security vulnerability has been identified with HPE Helion Eucalyptus. The vulnerability could be exploited to bypass access permissions by a remote authenticated user. Notes: - In Eucalyptus, following the AWS model, IAM roles are used to temporarily allow users or services to access resources within or across accounts. Access to roles is determined by the role.s trust policy and a set of user permissions. The trust policy is associated with a role and defines which accounts or services are allowed to assume the role. User permissions are defined by the policy associated with the user, and define a set of actions and resources that the user is allowed to access. - An issue has been identified in how Eucalyptus checks user permissions when allowing a user to assume a role. Given that the grant policy allows the user.s account to assume the role, any user in that account would be able to assume the role, even if the user.s policy does not explicitly grant the AssumeRole permission for the role. As a result, in some cases authenticated users could gain privileges by assuming an IAM role that they were not intended to have access to. The impact is mitigated by the fact that the role.s trust policy still has to explicitly authorize the user.s account to access the role. Revision 1 of this advisory.
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