An authentication bypass vulnerability has been identified in the REST and SOAP API components of Tripwire Enterprise (TE) 9.1.0 when TE is configured to use LDAP/Active Directory SAML authentication and its optional Auto-synchronize LDAP Users, Roles, and Groups feature is enabled. This vulnerability allows unauthenticated attackers to bypass authentication if a valid username is known. Exploitation of this vulnerability could allow remote attackers to gain privileged access to the APIs and lead to unauthorized information disclosure or modification.
The requirements for the product dictate the use of an established authentication algorithm, but the implementation of the algorithm is incorrect.