Security advisory

{
  "id": "bf2d6935fea9bb985f29700d9e602a28f6b906e29018e200c185c49fbe5a4cac",
  "url": "https://osv.dev/vulnerability/CVE-2019-16905",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2019-16905",
    "summary": "OpenSSH 7.7 through 7.9 and 8.x before 8.1, when compiled with an experimental key type, has a pre-authentication integer overflow if a client or server is configured to use a crafted XMSS key. This leads to memory corruption and local code execution because of an error in the XMSS key parsing algorithm. NOTE: the XMSS implementation is considered experimental in all released OpenSSH versions, and there is no supported way to enable it when building portable OpenSSH.",
    "evidence": "osv:CVE-2019-16905",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2019-16905",
      "aliases": [
        "CVE-2019-16905"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/openssh/openssh-portable",
              "type": "GIT",
              "events": [
                {
                  "introduced": "a0349a1cc4a18967ad1dbff5389bcdf9da098814"
                },
                {
                  "last_affected": "aede1c34243a6f7feae2fb2cb686ade5f9be6f3d"
                },
                {
                  "introduced": "fd0fa130ecf06d7d092932adcd5d77f1549bfc8d"
                },
                {
                  "fixed": "cdf1d0a9f5d18535e0a18ff34860e81a6d83aa5c"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:openbsd:openssh:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "7.7"
                      },
                      {
                        "last_affected": "7.9"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:openbsd:openssh:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "8.0"
                      },
                      {
                        "fixed": "8.1"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "V_8_0_P1",
            "V_7_9_P1",
            "V_7_8_P1",
            "V_7_7_P1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2019-16905.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:28.760946023Z",
      "provider": "osv",
      "references": [
        "https://cert-portal.siemens.com/productcert/html/ssa-398330.html",
        "https://cert-portal.siemens.com/productcert/html/ssa-412672.html",
        "https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf",
        "https://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/sshkey-xmss.c",
        "https://security.gentoo.org/glsa/201911-01",
        "https://security.netapp.com/advisory/ntap-20191024-0003/",
        "https://www.openssh.com/releasenotes.html",
        "https://www.openwall.com/lists/oss-security/2019/10/09/1",
        "https://bugzilla.suse.com/show_bug.cgi?id=1153537",
        "https://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/sshkey-xmss.c.diff?r1=1.5&r2=1.6&f=h",
        "https://ssd-disclosure.com/archives/4033/ssd-advisory-openssh-pre-auth-xmss-integer-overflow"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:o:siemens:scalance_x204rna_ecc_firmware:*:*:*:*:*:*:*:*"
            ],
            "vendor_product": "siemens:scalance_x204rna_ecc_firmware",
            "extracted_events": [
              {
                "range": [
                  {
                    "fixed": "3.2.7"
                  }
                ],
                "source": "CPE_RANGE"
              }
            ]
          },
          {
            "cpes": [
              "cpe:2.3:o:siemens:scalance_x204rna_firmware:*:*:*:*:*:*:*:*"
            ],
            "vendor_product": "siemens:scalance_x204rna_firmware",
            "extracted_events": [
              {
                "range": [
                  {
                    "fixed": "3.2.7"
                  }
                ],
                "source": "CPE_RANGE"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2019-16905",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 432131,
  "published_at": "2019-10-09T20:15:23.503+00:00"
}