CVE-2023-43637

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Source
https://cve.org/CVERecord?id=CVE-2023-43637
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-43637.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2023-43637
Aliases
Downstream
Related
Published
2023-09-21T13:20:05.473Z
Modified
2026-07-15T01:49:15.231266346Z
Severity
  • 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H CVSS Calculator
Summary
Vault Key Partially Predetermined
Details

Due to the implementation of "deriveVaultKey", prior to version 7.10, the generated vault key would always have the last 16 bytes predetermined to be "arfoobarfoobarfo".

This issue happens because "deriveVaultKey" calls "retrieveCloudKey" (which will always return "foobarfoobarfoobarfoobarfoobarfo" as the key), and then merges the 32byte randomly generated key with this key (by takeing 16bytes from each, see "mergeKeys").

This makes the key a lot weaker.

This issue does not persist in devices that were initialized on/after version 7.10, but devices that were initialized before that and updated to a newer version still have this issue.

Roll an update that enforces the full 32bytes key usage.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/43xxx/CVE-2023-43637.json",
    "cna_assigner": "ASRG",
    "cwe_ids": [
        "CWE-321"
    ]
}
References

Affected packages

Git / github.com/lf-edge/eve

Affected ranges

Type
GIT
Repo
https://github.com/lf-edge/eve
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
63f50ad530975ac5a4e884fc338b372fd6c7c7be
Database specific 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "7.10"
        }
    ],
    "source": "AFFECTED_FIELD"
}

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-43637.json"