Security advisory

{
  "id": "b8efbc860af0a6e9df7e3f7c1d25e23102b0bd02106d1ee4bec23b98faba5c3b",
  "url": "https://osv.dev/vulnerability/CVE-2021-4043",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-4043",
    "summary": "NULL Pointer Dereference in GitHub repository gpac/gpac prior to 1.1.0.",
    "evidence": "osv:CVE-2021-4043",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2021-4043",
      "aliases": [
        "CVE-2021-4043"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/gpac/gpac",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "64a2e1b799352ac7d7aad1989bc06e7b0f2b01db"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "fixed": "64a2e1b799352ac7d7aad1989bc06e7b0f2b01db"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v1.0.0",
            "v0.9.0",
            "v0.9.0-preview",
            "v0.6.0",
            "v0.5.2"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-4043.json",
            "vanir_signatures": [
              {
                "id": "CVE-2021-4043-b5aa8783",
                "digest": {
                  "threshold": 0.9,
                  "line_hashes": [
                    "90498454461718875166423603208017846485",
                    "23362212995894710025932984104184674703",
                    "117685801059467852114604674600821678849",
                    "139362349446845440364679254503209547564",
                    "139190891020743429633337340557642644010",
                    "215702217417742443820087907692774663867",
                    "281186944942572325807107762207236673418"
                  ]
                },
                "source": "https://github.com/gpac/gpac/commit/64a2e1b799352ac7d7aad1989bc06e7b0f2b01db",
                "target": {
                  "file": "src/isomedia/box_code_base.c"
                },
                "deprecated": false,
                "signature_type": "Line",
                "signature_version": "v1"
              },
              {
                "id": "CVE-2021-4043-ffd5bc1e",
                "digest": {
                  "length": 318,
                  "function_hash": "159042606401760892140584452830935102179"
                },
                "source": "https://github.com/gpac/gpac/commit/64a2e1b799352ac7d7aad1989bc06e7b0f2b01db",
                "target": {
                  "file": "src/isomedia/box_code_base.c",
                  "function": "gitn_box_del"
                },
                "deprecated": false,
                "signature_type": "Function",
                "signature_version": "v1"
              }
            ],
            "vanir_signatures_modified": "2026-10-20T14:29:50Z"
          }
        }
      ],
      "modified": "2026-10-20T14:29:50.903560027Z",
      "provider": "osv",
      "references": [
        "https://www.debian.org/security/2023/dsa-5411",
        "https://huntr.dev/bounties/d7a534cb-df7a-48ba-8ce3-46b1551a9c47",
        "https://github.com/gpac/gpac/commit/64a2e1b799352ac7d7aad1989bc06e7b0f2b01db"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:a:gpac:gpac:*:*:*:*:*:*:*:*"
            ],
            "vendor_product": "gpac:gpac",
            "extracted_events": [
              {
                "range": [
                  {
                    "fixed": "1.1.0"
                  }
                ],
                "source": "CPE_RANGE"
              }
            ]
          },
          {
            "cpes": [
              "cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*"
            ],
            "vendor_product": "debian:debian_linux",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "11.0"
                  },
                  {
                    "last_affected": "11.0"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          },
          {
            "extracted_events": [
              {
                "range": [
                  {
                    "fixed": "1.1.0"
                  }
                ],
                "source": "DESCRIPTION"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2021-4043",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 389079,
  "published_at": "2022-02-04T23:15:12.25+00:00"
}