CVE-2023-32690

Responder can Invoke Undefined Behavior in libspdm Requester

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.

Category

5.7
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.15%
Vendor Advisory github.com
Affected: DMTF libspdm
Published at:
Updated at:

References

Link Tags
https://github.com/DMTF/libspdm/security/advisories/GHSA-56h8-4gv5-jf2c vendor advisory
https://github.com/DMTF/libspdm/issues/2068 patch
https://github.com/DMTF/libspdm/pull/2069 patch

Frequently Asked Questions

What is the severity of CVE-2023-32690?
CVE-2023-32690 has been scored as a medium severity vulnerability.
How to fix CVE-2023-32690?
To fix CVE-2023-32690, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2023-32690 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2023-32690 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-32690?
CVE-2023-32690 affects DMTF libspdm.
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