Security advisory

{
  "id": "9d8f4875dd63e09e365c42f34ad78381278d5287a53261e13b0a49a4a654168a",
  "url": "https://osv.dev/vulnerability/CVE-2019-9578",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2019-9578",
    "summary": "In devs.c in Yubico libu2f-host before 1.1.8, the response to init is misparsed, leaking uninitialized stack memory back to the device.",
    "evidence": "osv:CVE-2019-9578",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2019-9578",
      "aliases": [
        "CVE-2019-9578"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/yubico/libu2f-host",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "5e1d2dd3310586a0cd603ba6d1c0ae41b0e2d901"
                },
                {
                  "fixed": "e4bb58cc8b6202a421e65f8230217d8ae6e16eb5"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:yubico:libu2f-host:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.1.8"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "e4bb58cc8b6202a421e65f8230217d8ae6e16eb5"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "libu2f-host-1.1.6",
            "libu2f-host-1.1.5",
            "libu2f-host-1.1.4",
            "libu2f-host-1.1.3",
            "libu2f-host-1.1.2",
            "libu2f-host-1.1.1",
            "libu2f-host-1.1.0",
            "libu2f-host-1.0.0",
            "libu2f-host-0.0.4",
            "libu2f-host-0.0.3",
            "libu2f-host-0.0.2",
            "libu2f-host-0.0.1",
            "libu2f-host-0.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2019-9578.json",
            "vanir_signatures": [
              {
                "id": "CVE-2019-9578-240562e0",
                "digest": {
                  "threshold": 0.9,
                  "line_hashes": [
                    "11567275744523841877518153416187518118",
                    "44370850034924077708171989660832381896",
                    "188303028343851327688763961351998290166",
                    "145078100563149133988154089729284353283",
                    "216224806556506021471973488479284945323",
                    "78543609262864008034404409691289906146",
                    "298195757489697171354479924323044485927",
                    "314185290226119270872259819350989570243",
                    "24939522874790354133884502489879271461",
                    "76490889385848227444144861291301719677",
                    "314261858854284419405726470030233727425",
                    "148922957106482978517489830381474987071",
                    "314370417866445732464821320395808641267",
                    "14486720878436553949349358003086576635"
                  ]
                },
                "source": "https://github.com/yubico/libu2f-host/commit/e4bb58cc8b6202a421e65f8230217d8ae6e16eb5",
                "target": {
                  "file": "u2f-host/devs.c"
                },
                "deprecated": false,
                "signature_type": "Line",
                "signature_version": "v1"
              },
              {
                "id": "CVE-2019-9578-c6e7e14f",
                "digest": {
                  "length": 712,
                  "function_hash": "147196423138426783156581629780352000219"
                },
                "source": "https://github.com/yubico/libu2f-host/commit/e4bb58cc8b6202a421e65f8230217d8ae6e16eb5",
                "target": {
                  "file": "u2f-host/devs.c",
                  "function": "init_device"
                },
                "deprecated": false,
                "signature_type": "Function",
                "signature_version": "v1"
              }
            ],
            "vanir_signatures_modified": "2026-10-20T13:53:00Z"
          }
        }
      ],
      "modified": "2026-10-20T13:53:00.966110037Z",
      "provider": "osv",
      "references": [
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GMA4H6AZFYIR3LA5VKKEJZNCCIVMUCFQ/",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/S4YCFMSNMXZ7XC4U6WXPQA7JCXC6VOAJ/",
        "https://developers.yubico.com/libu2f-host/Release_Notes.html",
        "https://security.gentoo.org/glsa/202004-15",
        "https://github.com/Yubico/libu2f-host/commit/e4bb58cc8b6202a421e65f8230217d8ae6e16eb5",
        "https://blog.inhq.net/posts/yubico-libu2f-host-vuln-part2/"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2019-9578",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 388353,
  "published_at": "2019-03-05T23:29:02.943+00:00"
}