libspdm improper authentication

Summaryinfo

A vulnerability described as critical has been identified in libspdm. Affected is an unknown function. The manipulation results in improper authentication. This vulnerability is reported as CVE-2023-31127. The attacker must have access to the local network to execute the attack. No exploit exists. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in libspdm (unknown version). It has been classified as critical. Affected is an unknown code block. The manipulation with an unknown input leads to a improper authentication vulnerability. CWE is classifying the issue as CWE-287. When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

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 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.

The weakness was disclosed 05/09/2023 as GHSA-qw76-4v8p-xq9f. The advisory is available at github.com. This vulnerability is traded as CVE-2023-31127 since 04/24/2023. The technical details are unknown and an exploit is not available.

Upgrading eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

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• libspdm

CPE 2.3info

• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍

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