CVE-2023-32690
low-risk
Published 2023-06-01
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.
Do I need to act?
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0.19% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.7/10
Medium
ADJACENT_NETWORK
/ LOW complexity
Affected Products (1)
Libspdm
Affected Vendors
References (6)
25
/ 100
low-risk
Severity
19/34 · Moderate
Exploitability
1/34 · Minimal
Exposure
5/34 · Minimal