Security advisory

{
  "id": "38c20a39679c46f049bc9be97a83e90315570226d8aa98434823aeb412ef7e3e",
  "url": "https://osv.dev/vulnerability/CVE-2021-23165",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-23165",
    "summary": "A flaw was found in htmldoc before v1.9.12. Heap buffer overflow in pspdf_prepare_outpages(), in ps-pdf.cxx may lead to execute arbitrary code and denial of service.",
    "evidence": "osv:CVE-2021-23165",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2021-23165",
      "aliases": [
        "CVE-2021-23165"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/michaelrsweet/htmldoc",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "df5d3010151a506c5ca138548aac02b37fb421f9"
                },
                {
                  "fixed": "6e8a95561988500b5b5ae4861b3b0cbf4fba517f"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:htmldoc_project:htmldoc:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.9.12"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "6e8a95561988500b5b5ae4861b3b0cbf4fba517f"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v1.9.11",
            "v1.9.10",
            "v1.9.9",
            "v1.9.8",
            "v1.9.7",
            "v1.9.6",
            "v1.9.5",
            "v1.9.4",
            "v1.9.3",
            "v1.9.2",
            "v1.9.1",
            "v1.9",
            "v1.8.30"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-23165.json",
            "vanir_signatures": [
              {
                "id": "CVE-2021-23165-3ed1c48a",
                "digest": {
                  "threshold": 0.9,
                  "line_hashes": [
                    "29899245667637771670938822648097839685",
                    "137215429918228258668544994580327484211",
                    "9749687041195673538917204860068654032",
                    "231466899035723946641679043138322513824"
                  ]
                },
                "source": "https://github.com/michaelrsweet/htmldoc/commit/6e8a95561988500b5b5ae4861b3b0cbf4fba517f",
                "target": {
                  "file": "htmldoc/ps-pdf.cxx"
                },
                "deprecated": false,
                "signature_type": "Line",
                "signature_version": "v1"
              },
              {
                "id": "CVE-2021-23165-5a3fe8cf",
                "digest": {
                  "length": 2554,
                  "function_hash": "317143762402956248537184830359378314068"
                },
                "source": "https://github.com/michaelrsweet/htmldoc/commit/6e8a95561988500b5b5ae4861b3b0cbf4fba517f",
                "target": {
                  "file": "htmldoc/ps-pdf.cxx",
                  "function": "pspdf_prepare_outpages"
                },
                "deprecated": false,
                "signature_type": "Function",
                "signature_version": "v1"
              }
            ],
            "vanir_signatures_modified": "2026-10-20T14:23:31Z"
          }
        }
      ],
      "modified": "2026-10-20T14:23:31.246567958Z",
      "provider": "osv",
      "references": [
        "https://github.com/michaelrsweet/htmldoc/commit/6e8a95561988500b5b5ae4861b3b0cbf4fba517f.patch",
        "https://github.com/michaelrsweet/htmldoc/issues/413",
        "https://bugzilla.redhat.com/show_bug.cgi?id=1967014",
        "https://github.com/michaelrsweet/htmldoc/commit/6e8a95561988500b5b5ae4861b3b0cbf4fba517f"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-23165",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 388874,
  "published_at": "2022-03-16T15:15:10.157+00:00"
}