Security advisory

{
  "id": "d8985136327cfa68e3cef7ec7e3c3e907526477c036beae454b75f4ad0f31854",
  "url": "https://osv.dev/vulnerability/CVE-2020-28248",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2020-28248",
    "summary": "An integer overflow in the PngImg::InitStorage_() function of png-img before 3.1.0 leads to an under-allocation of heap memory and subsequently an exploitable heap-based buffer overflow when loading a crafted PNG file.",
    "evidence": "osv:CVE-2020-28248",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2020-28248",
      "aliases": [
        "CVE-2020-28248",
        "GHSA-q5wr-fvpq-p67g"
      ],
      "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/gemini-testing/png-img",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "3665569bac8aaa01014add5cb79801645fd94e3c"
                },
                {
                  "fixed": "14ac462a32ca4b3b78f56502ac976d5b0222ce3d"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:png-img_project:png-img:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "3.1.0"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "14ac462a32ca4b3b78f56502ac976d5b0222ce3d"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v3.0.0",
            "v2.3.0",
            "v2.2.0",
            "v2.1.1",
            "v2.1.0",
            "v2.0.0",
            "v1.1.4",
            "v1.1.3",
            "v1.1.2",
            "v1.1.1",
            "v1.1.0",
            "v1.0.0",
            "v0.4.1",
            "v0.4.0",
            "v0.3.0",
            "v0.2.1",
            "v0.2.0",
            "v0.1.1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-28248.json",
            "vanir_signatures": [
              {
                "id": "CVE-2020-28248-0a0dfe46",
                "digest": {
                  "length": 253,
                  "function_hash": "247540405358534864148916063282642105731"
                },
                "source": "https://github.com/gemini-testing/png-img/commit/14ac462a32ca4b3b78f56502ac976d5b0222ce3d",
                "target": {
                  "file": "src/PngImg.cc",
                  "function": "PngImg::InitStorage_"
                },
                "deprecated": false,
                "signature_type": "Function",
                "signature_version": "v1"
              },
              {
                "id": "CVE-2020-28248-e7d4e48e",
                "digest": {
                  "threshold": 0.9,
                  "line_hashes": [
                    "236923606706807126852737180229274119136",
                    "239734977927648997720820885809752257972",
                    "289798947922595080307175432979138576455",
                    "238842229380349258414681969259940006383",
                    "3128312757959955466674962830250232240",
                    "305968787605953264195244417358628798401"
                  ]
                },
                "source": "https://github.com/gemini-testing/png-img/commit/14ac462a32ca4b3b78f56502ac976d5b0222ce3d",
                "target": {
                  "file": "src/PngImg.cc"
                },
                "deprecated": false,
                "signature_type": "Line",
                "signature_version": "v1"
              }
            ],
            "vanir_signatures_modified": "2026-10-20T13:59:07Z"
          }
        }
      ],
      "modified": "2026-10-20T13:59:07.727670104Z",
      "provider": "osv",
      "references": [
        "https://github.com/gemini-testing/png-img/compare/v3.0.0...v3.1.0",
        "https://github.com/gemini-testing/png-img/commit/14ac462a32ca4b3b78f56502ac976d5b0222ce3d",
        "https://github.com/gemini-testing/png-img",
        "https://securitylab.github.com/advisories/GHSL-2020-142-gemini-png-img"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2020-28248",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 388466,
  "published_at": "2021-02-20T00:15:12.483+00:00"
}