Security advisory

{
  "id": "ae8a35aa5eb41b0774afa104ec1e7c793338cc37dfecff3f4f21c53c62f8bc6d",
  "url": "https://osv.dev/vulnerability/CVE-2018-20096",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2018-20096",
    "summary": "There is a heap-based buffer over-read in the Exiv2::tEXtToDataBuf function of pngimage.cpp in Exiv2 0.27-RC3. A crafted input will lead to a remote denial of service attack.",
    "evidence": "osv:CVE-2018-20096",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2018-20096",
      "aliases": [
        "CVE-2018-20096",
        "PYSEC-2018-117"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/exiv2/exiv2",
              "type": "GIT",
              "events": [
                {
                  "introduced": "38e2fb7ca71903e801e0bd1a043633847d385c1a"
                },
                {
                  "last_affected": "38e2fb7ca71903e801e0bd1a043633847d385c1a"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:exiv2:exiv2:0.27:rc3:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0.27-rc3"
                      },
                      {
                        "last_affected": "0.27-rc3"
                      }
                    ],
                    "source": "CPE_STRING"
                  }
                ]
              }
            }
          ],
          "versions": [
            "0.27-rc3",
            "0.27-RC3"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-20096.json"
          }
        }
      ],
      "modified": "2026-10-20T10:48:02.921342151Z",
      "provider": "osv",
      "references": [
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZXCEKTYF7HLM6VH2WCWO2HXTJH37MBLA/",
        "https://access.redhat.com/errata/RHSA-2019:2101",
        "https://github.com/Exiv2/exiv2/issues/590",
        "https://github.com/TeamSeri0us/pocs/tree/master/exiv2/20181206"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2018-20096",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 379979,
  "published_at": "2018-12-12T10:29:00.677+00:00"
}