CVE-2023-32690

Name: CVE-2023-32690
Creator: NVD / NIST
Published: 2023-06-01T17:15:09.947+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 0.71%

Last modified Jun 17, 2026

CVE-2023-32690 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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. EPSS estimates a 0.71% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

0.71%

48.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-20

Affected Software

Vendor	Product	Versions
Dmtf	Libspdm	< 2.3.3

References

https://github.com/DMTF/libspdm/issues/2068Patch
https://github.com/DMTF/libspdm/pull/2069Patch
https://github.com/DMTF/libspdm/security/advisories/GHSA-56h8-4gv5-jf2cVendor Advisory
https://github.com/DMTF/libspdm/issues/2068Patch
https://github.com/DMTF/libspdm/pull/2069Patch
https://github.com/DMTF/libspdm/security/advisories/GHSA-56h8-4gv5-jf2cVendor Advisory

Timeline

Published: Jun 1, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-32690?

How severe is CVE-2023-32690?

CVE-2023-32690 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.71% probability of exploitation in the next 30 days.

How do I fix CVE-2023-32690?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-32690?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST