Security advisory

{
  "id": "b92aa561b8e1a8b61ba0e647362fc0a18e0a790e545a67c30353aff76113912e",
  "url": "https://osv.dev/vulnerability/CVE-2021-28429",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-28429",
    "summary": "Integer overflow vulnerability in av_timecode_make_string in libavutil/timecode.c in FFmpeg version 4.3.2, allows local attackers to cause a denial of service (DoS) via crafted .mov file.",
    "evidence": "osv:CVE-2021-28429",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2021-28429",
      "aliases": [
        "CVE-2021-28429"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.ffmpeg.org/ffmpeg.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "f719f869907764e6412a6af6e178c46e5f915d25"
                },
                {
                  "last_affected": "f719f869907764e6412a6af6e178c46e5f915d25"
                },
                {
                  "fixed": "c94875471e3ba3dc396c6919ff3ec9b14539cd71"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:ffmpeg:ffmpeg:4.3.2:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "4.3.2"
                      },
                      {
                        "last_affected": "4.3.2"
                      }
                    ],
                    "source": "CPE_STRING"
                  },
                  {
                    "range": [
                      {
                        "fixed": "c94875471e3ba3dc396c6919ff3ec9b14539cd71"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "4.3.2",
            "n4.3.2"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-28429.json",
            "vanir_signatures": [
              {
                "id": "CVE-2021-28429-2bf1971a",
                "digest": {
                  "threshold": 0.9,
                  "line_hashes": [
                    "335739989115254508712258778105280409638",
                    "274512929795770645397955884638312007539",
                    "38893900513757338277920846245099231610",
                    "94505868597328706020015251903087308703",
                    "267156690267434599005120480994457071610"
                  ]
                },
                "source": "https://git.ffmpeg.org/ffmpeg.git@c94875471e3ba3dc396c6919ff3ec9b14539cd71",
                "target": {
                  "file": "libavutil/timecode.c"
                },
                "deprecated": false,
                "signature_type": "Line",
                "signature_version": "v1"
              },
              {
                "id": "CVE-2021-28429-cb5ec445",
                "digest": {
                  "length": 690,
                  "function_hash": "58418444567264364141299228991211175920"
                },
                "source": "https://git.ffmpeg.org/ffmpeg.git@c94875471e3ba3dc396c6919ff3ec9b14539cd71",
                "target": {
                  "file": "libavutil/timecode.c",
                  "function": "av_timecode_make_string"
                },
                "deprecated": false,
                "signature_type": "Function",
                "signature_version": "v1"
              }
            ],
            "vanir_signatures_modified": "2026-10-24T14:06:57Z"
          }
        },
        {
          "ranges": [
            {
              "repo": "https://github.com/ffmpeg/ffmpeg",
              "type": "GIT",
              "events": [
                {
                  "introduced": "f719f869907764e6412a6af6e178c46e5f915d25"
                },
                {
                  "last_affected": "f719f869907764e6412a6af6e178c46e5f915d25"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:ffmpeg:ffmpeg:4.3.2:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "4.3.2"
                      },
                      {
                        "last_affected": "4.3.2"
                      }
                    ],
                    "source": "CPE_STRING"
                  }
                ]
              }
            }
          ],
          "versions": [
            "4.3.2",
            "n4.3.2"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-28429.json"
          }
        }
      ],
      "modified": "2026-10-24T14:06:57.023484213Z",
      "provider": "osv",
      "references": [
        "https://git.ffmpeg.org/gitweb/ffmpeg.git/commitdiff/c94875471e3ba3dc396c6919ff3ec9b14539cd71"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-28429",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 443065,
  "published_at": "2023-08-11T14:15:12.667+00:00"
}