{"cve":"CVE-2023-43637","nvd":{"published":"2023-09-21T14:15:11.643","modified":"2026-06-17T06:26:07.780","status":"Modified","description":"Due 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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8},"cwes":["CWE-798","CWE-321"],"references":["https://asrg.io/security-advisories/cve-2023-43637/","https://asrg.io/security-advisories/cve-2023-43637/"],"products":["lfedge:eve"],"source":"nvd","synced_at":"2026-10-19T21:39:24.235896374+00:00"},"epss":{"cve":"CVE-2023-43637","score":0.00142,"percentile":0.0353,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-g7vp-j25f-h34p","url":"https://osv.dev/vulnerability/GHSA-g7vp-j25f-h34p","summary":"EVE Has Partially Predetermined Vault Key","modified":"2026-02-19T20:41:23.893760Z","packages":[{"ecosystem":"Go","name":"github.com/lf-edge/eve","purl":"pkg:golang/github.com/lf-edge/eve","ranges":["<0.0.0-20220310190112-c0c966dc31e2"],"fixed":["0.0.0-20220310190112-c0c966dc31e2"]}]},{"id":"GO-2026-4436","url":"https://osv.dev/vulnerability/GO-2026-4436","summary":"EVE Has Partially Predetermined Vault Key in github.com/lf-edge/eve","modified":"2026-02-19T20:41:23.893760Z","packages":[{"ecosystem":"Go","name":"github.com/lf-edge/eve","purl":"pkg:golang/github.com/lf-edge/eve","ranges":["<0.0.0-20220310190112-c0c966dc31e2"],"fixed":["0.0.0-20220310190112-c0c966dc31e2"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}