ghsa-hx74-4wmc-fwvf
Vulnerability from github
Published
2023-09-21 15:30
Modified
2024-04-04 07:47
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
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.

Show details on source website

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{
  "affected": [],
  "aliases": [
    "CVE-2023-43637"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-321",
      "CWE-798"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2023-09-21T14:15:11Z",
    "severity": "HIGH"
  },
  "details": "\nDue to the implementation of \"deriveVaultKey\", prior to version 7.10, the generated vault key\nwould always have the last 16 bytes predetermined to be \"arfoobarfoobarfo\".\n\nThis issue happens because \"deriveVaultKey\" calls \"retrieveCloudKey\" (which will always\nreturn \"foobarfoobarfoobarfoobarfoobarfo\" as the key), and then merges the 32byte\nrandomly generated key with this key (by takeing 16bytes from each, see \"mergeKeys\").\n\nThis makes the key a lot weaker.\n\nThis issue does not persist in devices that were initialized on/after version 7.10, but devices\nthat were initialized before that and updated to a newer version still have this issue.\n\n\n\nRoll an update that enforces the full 32bytes key usage.\n\n\n\n\n\n\n",
  "id": "GHSA-hx74-4wmc-fwvf",
  "modified": "2024-04-04T07:47:45Z",
  "published": "2023-09-21T15:30:15Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-43637"
    },
    {
      "type": "WEB",
      "url": "https://asrg.io/security-advisories/cve-2023-43637"
    },
    {
      "type": "WEB",
      "url": "https://asrg.io/security-advisories/vault-key-partially-predetermined"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}


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