CVE-2023-32690 Responder can Invoke Undefined Behavior in libspdm Requester

libspdm is a sample implementation that follows the DMTF SPDM specifications. Prior to versions 2.3.3 and 3.0, following a successful CAPABILITIES response, a libspdm Requester stores the Responder's CTExponent into its context without validation. If the Requester sends a request message that...

CVE-2023-32690

Summary: libspdm (DMTF SPDM) prior to versions 2.3.3 and 3.0 stores the responder’s CTExponent after a CAPABILITIES response without validation. If a cryptographic operation is later requested (e.g., CHALLENGE), the requester uses the unvalidated CTExponent to compute a timeout, enabling potentia...