CVE-2023-43634

CVSS 3.1 Score 8.8 of 10 (high)

Details

Published Sep 21, 2023
Updated: Oct 16, 2023
CWE ID 522
CWE ID 922

Summary

CVE-2023-43634 is a vulnerability that affects multiple products (identified by the product codes) and has a high severity rating of 8.8 out of 10. The vulnerability arises from a misconfiguration in the sealing/unsealing process of the "vault" key, specifically related to the measurement of PCR values. The issue occurs when the config partition measurement is moved from PCR 13 to PCR 14, but PCR 14 is not added to the list of PCRs that seal/unseal the key. This makes the measurement of PCR 14 redundant and allows an attacker to modify the config partition without triggering measured boot, potentially gaining full control over the device and accessing encrypted data stored in the "vault." It is recommended to remediate this vulnerability by updating the affected products to include PCR 14 in the list of PCRs used for sealing/unsealing operations.

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