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CVE-2023-32690

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Date: June 1, 2023

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 requires a cryptography operation by the Responder, such as CHALLENGE, libspdm will calculate the timeout value using the Responder's unvalidated CTExponent. A patch is available in version 2.3.3. A workaround is also available. After completion of VCA, the Requester can check the value of the Responder's CTExponent. If it greater than or equal to 64, then the Requester can stop communication with the Responder.

Language: C

Severity Score

Related Resources (5)

https://github.com/DMTF/libspdm/issues/2068
https://nvd.nist.gov/vuln/detail/CVE-2023-32690
https://github.com/DMTF/libspdm/pull/2069
https://github.com/DMTF/libspdm/security/advisories/GHSA-56h8-4gv5-jf2c
https://www.mend.io/vulnerability-database/CVE-2023-32690

Severity Score

Weakness Type (CWE)

Insufficient Information

NVD-CWE-noinfo

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): HIGH

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