IBM Tivoli Federated Identity Manager (TFIM) and Tivoli Federated Identity Manager Business Gateway (TFIMBG) 6.1.1, 6.2.0, 6.2.1, and 6.2.2 allow remote attackers to establish sessions via a crafted message that leverages (1) a signature-validation bypass for SAML messages containing unsigned elements, (2) incorrect validation of XML messages, or (3) a certificate-chain validation bypass for an XML signature element that contains the signing certificate.
Improper Input Validation The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly.