Security advisory

{
  "id": "d898739aace99925795ddce46648a3a853e9ce1fea75a5aacc945cfe694a27e8",
  "url": "https://osv.dev/vulnerability/CVE-2020-24994",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2020-24994",
    "summary": "Stack overflow in the parse_tag function in libass/ass_parse.c in libass before 0.15.0 allows remote attackers to cause a denial of service or remote code execution via a crafted file.",
    "evidence": "osv:CVE-2020-24994",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2020-24994",
      "aliases": [
        "CVE-2020-24994"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/libass/libass",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "d149636f502f5774ae1a8fb4c554b122674393b2"
                },
                {
                  "fixed": "6835731c2fe4164a0c50bc91d12c43b2a2b4e"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:libass_project:libass:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "0.15.0"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "6835731c2fe4164a0c50bc91d12c43b2a2b4e"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "0.14.0",
            "0.13.7",
            "0.13.6",
            "0.13.5",
            "0.13.4",
            "0.13.3",
            "0.13.2",
            "0.13.1",
            "0.13.0",
            "0.12.3",
            "0.12.2",
            "0.12.1",
            "0.12.0",
            "0.11.2",
            "0.11.1",
            "0.11.0",
            "0.10.2",
            "0.10.1",
            "0.10.0",
            "0.9.12",
            "0.9.11",
            "0.9.10",
            "0.9.9",
            "0.9.8",
            "0.9.7"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-24994.json"
          }
        }
      ],
      "modified": "2026-10-20T10:52:52.277964323Z",
      "provider": "osv",
      "references": [
        "https://github.com/libass/libass/issues/423",
        "https://github.com/libass/libass/commit/6835731c2fe4164a0c50bc91d12c43b2a2b4e",
        "https://github.com/libass/libass/issues/422",
        "https://github.com/libass/libass/issues/422#issuecomment-806002919"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2020-24994",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 383982,
  "published_at": "2021-03-23T20:15:13.073+00:00"
}