EVE Doesn't Measure Config Partition From 2 Fronts
### Impact PCR14 is not included in the list of PCRs that seal/unseal the vault key. Additionally, the vault key uses SHA1 PCRs instead of SHA256. Thus an attacker with physical access can take out the disk, use a different computer to modify the files in the /config partition, and re-insert the disk and boot without the change being detected by measured boot and remote attestation. ### Patches Fixed in EVE version 9.4.3-lts ### Workarounds None (apart from preventing physical access to the device) ### Resources https://help.zededa.com/hc/en-us/articles/43295940828827-TPM-PCR-Index-Security-Implications https://github.com/lf-edge/eve/commit/d9383a7ee4e1c39f5c8c6d4a63cb2ebd00695e8a
beschreibt (1)
Zugehörige CVEs.
| ID | Schweregrad | ausnutzbar | ||
|---|---|---|---|---|
| CVE-2023-43630US | high8.8 | — | ||
PCR14 is not in the list of PCRs that seal/unseal the “vault” key, but
due to the change that was implemented in commit
“7638364bc0acf8b5c481b5ce5fea11ad44ad7fd4”, fixing this issu… | ||||
Referenzen
Externe Belege — Patches, Meldungen, Analysen.
- https://asrg.io/security-advisories/config-partition-not-measured-from-2-frontsWEB
- https://asrg.io/security-advisories/cve-2023-43630WEB
- https://github.com/lf-edge/evePACKAGE
- https://github.com/lf-edge/eve/commit/d9383a7ee4e1c39f5c8c6d4a63cb2ebd00695e8aWEB
- https://github.com/lf-edge/eve/security/advisories/GHSA-phcg-h58r-gmcqWEB
- https://help.zededa.com/hc/en-us/articles/43295940828827-TPM-PCR-Index-Security-ImplicationsWEB
- https://nvd.nist.gov/vuln/detail/CVE-2023-43630ADVISORY
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