lf-edge/eve · Security
EVE Doesn't Protect Config Partition with Measured Boot
- GHSA ID
- GHSA-wc42-fcjp-v8vq
- CVE ID
- CVE-2023-43634
- Severity
- medium
- Published
- Updated
- CVSS
- 5.9 · CVSS:3.1/AV:P/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:N
- CVSS v3
- 5.9 · CVSS:3.1/AV:P/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:N
Description
Impact
Config partition measurement was moved from PCR 13 to PCR 14 in a commit, but PCR 14 was not added to the list of PCRs that seal/unseal the vault key. As a result, an attacker can remove the disk, use another server to modify the files in the config partition, and then re-insert the disk.
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
CWEs
- CWE-522 · Insufficiently Protected Credentials
- CWE-922 · Insecure Storage of Sensitive Information
References
- https://github.com/lf-edge/eve/security/advisories/GHSA-wc42-fcjp-v8vq ↗
- https://nvd.nist.gov/vuln/detail/CVE-2023-43634 ↗
- https://asrg.io/security-advisories/config-partition-not-protected-by-measured-boot ↗
- https://asrg.io/security-advisories/cve-2023-43634 ↗
- https://github.com/advisories/GHSA-wc42-fcjp-v8vq ↗