8.8

CVE-2023-43634

When sealing/unsealing the “vault” key, a list of PCRs is used, which defines which PCRs
are used.

In a previous project, CYMOTIVE found that the configuration is not protected by the secure
boot, and in response Zededa implemented measurements on the config partition that was
mapped to PCR 13.

In that process, PCR 13 was added to the list of PCRs that seal/unseal the key.

In commit “56e589749c6ff58ded862d39535d43253b249acf”, the config partition
measurement moved from PCR 13 to PCR 14, but PCR 14 was not added to the list of
PCRs that seal/unseal the key.

This change makes the measurement of PCR 14 effectively redundant as it would not affect
the sealing/unsealing of the key.



An attacker could modify the config partition without triggering the measured boot, this could
result in the attacker gaining full control over the device with full access to the contents of the
encrypted “vault”
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Lfedge ≫ Eve Version < 8.6.0
Lfedge ≫ Eve Version >= 9.0.0 < 9.5.0
Zu dieser CVE wurde keine CISA KEV oder CERT.AT-Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.03% 0.084
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 8.8 2 6
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
cve@asrg.io 8.8 2 6
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
CWE-522 Insufficiently Protected Credentials

The product transmits or stores authentication credentials, but it uses an insecure method that is susceptible to unauthorized interception and/or retrieval.

CWE-922 Insecure Storage of Sensitive Information

The product stores sensitive information without properly limiting read or write access by unauthorized actors.