Security advisory

{
  "id": "0dda63721abd8157e36118a5133b2c2f6ac3e6ec54fc71ac8522265533b77349",
  "url": "https://osv.dev/vulnerability/CVE-2021-35306",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-35306",
    "summary": "An issue was discovered in Bento4 through v1.6.0-636. A NULL pointer dereference exists in the function AP4_StszAtom::WriteFields located in Ap4StszAtom.cpp. It allows an attacker to cause a denial of service (DOS).",
    "evidence": "osv:CVE-2021-35306",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2021-35306",
      "aliases": [
        "CVE-2021-35306"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/axiomatic-systems/bento4",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "99d7d8cda4f2beb9508948bda44e33fdd5a75c25"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:axiosys:bento4:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "1.6.0-636"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v1.6.0-636",
            "v1.6.0-635",
            "v1.5.1-630",
            "v1.5.1-629",
            "v1.5.1-626",
            "v1.5.1-624",
            "v1.5.1-623",
            "v1.5.1-622",
            "v1.5.1-621",
            "v1.5.1-620",
            "v1.5.0-619",
            "v1.5.0-618",
            "v1.5.0-617",
            "v1.5.0-616",
            "v1.5.0-615",
            "v1.5.0-611",
            "v1.5.0-613",
            "v1.5.0-612",
            "v1.5.0-610",
            "v1.5.0-609",
            "v1.4.3-608",
            "v1.4.3-607",
            "v1.4.3-606",
            "v1.4.3-605",
            "v1.4.3-604",
            "v1.4.3-603",
            "v1.4.3-602",
            "v1.4.3-601",
            "v1.4.3-600",
            "v1.4.3-599",
            "v1.4.3-598",
            "v1.4.3-597",
            "v1.4.3-596",
            "v1.4.3-595",
            "v1.4.2-594",
            "v1.4.2-593",
            "v1.4.2-592",
            "v1.4.2-591",
            "v1.4.2-590",
            "v1.4.2-589",
            "v1.4.2-588",
            "v1.4.2-587",
            "v1.4.2-586",
            "v1.4.2-584"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-35306.json"
          }
        }
      ],
      "modified": "2026-10-20T10:54:45.995520146Z",
      "provider": "osv",
      "references": [
        "https://github.com/axiomatic-systems/Bento4/issues/615"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-35306",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 386115,
  "published_at": "2021-08-05T20:15:09.387+00:00"
}