The CloudStack SAML authentication (disabled by default) does not enforce signature check. In CloudStack environments where SAML authentication is enabled, an attacker that initiates CloudStack SAML single sign-on authentication can bypass SAML authentication by submitting a spoofed SAML response with no signature and known or guessed username and other user details of a SAML-enabled CloudStack user-account. In such environments, this can result in a complete compromise of the resources owned and/or accessible by a SAML enabled user-account.
Affected users are recommended to disable the SAML authentication plugin by setting the saml2.enabled global setting to false, or upgrade to version 4.18.2.2, 4.19.1.0 or later, which addresses this issue.
This attack-focused weakness is caused by incorrectly implemented authentication schemes that are subject to spoofing attacks.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Cloudstack | Apache | 4.5.0 (including) | 4.18.2.2 (excluding) |
| Cloudstack | Apache | 4.19.0.0 (including) | 4.19.1.0 (excluding) |