CVE-2023-31127

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Summary

CVECVE-2023-31127
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2023-05-08 21:15:00 UTC
Updated2023-05-15 18:08:00 UTC
Descriptionlibspdm is a sample implementation that follows the DMTF SPDM specifications. A vulnerability has been identified in SPDM session establishment in libspdm prior to version 2.3.1. If a device supports both DHE session and PSK session with mutual authentication, the attacker may be able to establish the session with `KEY_EXCHANGE` and `PSK_FINISH` to bypass the mutual authentication. This is most likely to happen when the Requester begins a session using one method (DHE, for example) and then uses the other method's finish (PSK_FINISH in this example) to establish the session. The session hashes would be expected to fail in this case, but the condition was not detected. This issue only impacts the SPDM responder, which supports `KEY_EX_CAP=1 and `PSK_CAP=10b` at same time with mutual authentication requirement. The SPDM requester is not impacted. The SPDM responder is not impacted if `KEY_EX_CAP=0` or `PSK_CAP=0` or `PSK_CAP=01b`. The SPDM responder is not impacted if mutual authentication is not required. libspdm 1.0, 2.0, 2.1, 2.2, 2.3 are all impacted. Older branches are not maintained, but users of the 2.3 branch may receive a patch in version 2.3.2. The SPDM specification (DSP0274) does not contain this vulnerability.

Risk And Classification

Problem Types: CWE-287

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Dmtf Libspdm All All All All

References

ReferenceSourceLinkTags
Add handshake mode switch check in FINISH and PSK_FINISH. by jyao1 · Pull Request #2006 · DMTF/libspdm · GitHub MISC github.com
DMTF-2023-0001: SPDM mutual authentication bypass · Advisory · DMTF/libspdm · GitHub MISC github.com
Add handshake mode switch check in FINISH and PSK_FINISH. by jyao1 · Pull Request #2007 · DMTF/libspdm · GitHub MISC github.com
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