Security advisory

{
  "id": "1846e471db58717c7f9b77eed67723132b9b43e052b22aafa04e0b04c44f850d",
  "url": "https://osv.dev/vulnerability/CVE-2021-3756",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-3756",
    "summary": "libmysofa is vulnerable to Heap-based Buffer Overflow",
    "evidence": "osv:CVE-2021-3756",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2021-3756",
      "aliases": [
        "CVE-2021-3756"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/hoene/libmysofa",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "8423749934bfc09121261694b1ccfba7e6d5c955"
                },
                {
                  "fixed": "890400ebd092c574707d0c132124f8ff047e20e1"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:symonics:libmysofa:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.2.1"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "890400ebd092c574707d0c132124f8ff047e20e1"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v1.2",
            "v1.1",
            "v1.0",
            "v0.9.1",
            "v0.9",
            "v0.8",
            "v0.7",
            "v0.6",
            "v0.5",
            "v0.4(Windows)",
            "v0.4",
            "v0,.4",
            "v0.2",
            "v0.1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-3756.json",
            "vanir_signatures": [
              {
                "id": "CVE-2021-3756-359a28bb",
                "digest": {
                  "threshold": 0.9,
                  "line_hashes": [
                    "244600815174416966585551841291712717397",
                    "90543973782827171041303815195698778748",
                    "73365424127951651928394975798515892895",
                    "177621056667884904289185552349472775630",
                    "187371343997902470181552116025032457317",
                    "307673362603936601153742255487468041332",
                    "317832962332053823589033881255471006245",
                    "265513809528132384416103992166682713830",
                    "111647921010230395044355286432373479076",
                    "117712949535435723859259441420883765571",
                    "4054312530996134748218050665896965235"
                  ]
                },
                "source": "https://github.com/hoene/libmysofa/commit/890400ebd092c574707d0c132124f8ff047e20e1",
                "target": {
                  "file": "src/hdf/dataobject.c"
                },
                "deprecated": false,
                "signature_type": "Line",
                "signature_version": "v1"
              },
              {
                "id": "CVE-2021-3756-6685c61c",
                "digest": {
                  "length": 2726,
                  "function_hash": "46558948747989781028996614797325144881"
                },
                "source": "https://github.com/hoene/libmysofa/commit/890400ebd092c574707d0c132124f8ff047e20e1",
                "target": {
                  "file": "src/hdf/dataobject.c",
                  "function": "readOHDRHeaderMessageDataLayout"
                },
                "deprecated": false,
                "signature_type": "Function",
                "signature_version": "v1"
              }
            ],
            "vanir_signatures_modified": "2026-10-20T14:04:51Z"
          }
        }
      ],
      "modified": "2026-10-20T14:04:51.112065293Z",
      "provider": "osv",
      "references": [
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PGQ45S4RH7MC42NHTAGOIHYR4C5IRTMZ/",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WGY7TAZX2M4NYXXGNHIBBKKN5XMSMKQ4/",
        "https://github.com/hoene/libmysofa/commit/890400ebd092c574707d0c132124f8ff047e20e1",
        "https://huntr.dev/bounties/7ca8d9ea-e2a6-4294-af28-70260bb53bc1"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*",
              "cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*"
            ],
            "vendor_product": "fedoraproject:fedora",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "34"
                  },
                  {
                    "last_affected": "34"
                  },
                  {
                    "introduced": "35"
                  },
                  {
                    "last_affected": "35"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2021-3756",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 388539,
  "published_at": "2021-10-29T16:15:07.537+00:00"
}