CVE-2023-32690

HIGH 7.5CVE-2023-32690 · Published 01/06/2023 · updated 17/06/2026

In short

CVE-2023-32690 is a HIGH (CVSS 7.5) vulnerability affecting libspdm (dmtf).
Chance of exploitation in the next 30 days (EPSS): 0.71%, higher than 53.8% of all vulnerabilities.
Fix: update to 2.3.3 or later.

Package	Affected versions	Patched versions
libspdm dmtf	`< 2.3.3`	`2.3.3`

Description

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.

References

DMTF/libspdm · Patch
DMTF/libspdm#2069 · Patch
DMTF/libspdm security advisory · Vendor Advisory

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