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CVE-2023-31127
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CVE-2023-31127
MITRE ATT&CK
Collection
Command and Control
Credential Access
Defense Evasion
Discovery
Execution
Exfiltration
Impact
Initial Access
Lateral Movement
Persistence
Privilege Escalation
Topic Tags
Description
libspdm 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 andPSK_CAP=10bat same time with mutual authentication requirement. The SPDM requester is not impacted. The SPDM responder is not impacted ifKEY_EX_CAP=0orPSK_CAP=0orPSK_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.
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