Security advisory

{
  "id": "55564a306cad2ca499fe8c8329de9b390f4454a2ce46ad1707b4fff9ebdd3a87",
  "url": "https://osv.dev/vulnerability/CVE-2021-1404",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-1404",
    "summary": "A vulnerability in the PDF parsing module in Clam AntiVirus (ClamAV) Software versions 0.103.0 and 0.103.1 could allow an unauthenticated, remote attacker to cause a denial of service condition on an affected device. The vulnerability is due to improper buffer size tracking that may result in a heap buffer over-read. An attacker could exploit this vulnerability by sending a crafted PDF file to an affected device. An exploit could allow the attacker to cause the ClamAV scanning process to crash, resulting in a denial of service condition.",
    "evidence": "osv:CVE-2021-1404",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2021-1404",
      "aliases": [
        "CVE-2021-1404"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/cisco-talos/clamav",
              "type": "GIT",
              "events": [
                {
                  "introduced": "31824a659dff37ae03e3419395bb68e659c2b165"
                },
                {
                  "last_affected": "e7f5f53737f51f3b8395c12b1f804dc6c2181169"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:clamav:clamav:0.103.0:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0.103.0"
                      },
                      {
                        "last_affected": "0.103.0"
                      }
                    ],
                    "source": "CPE_STRING"
                  },
                  {
                    "cpe": "cpe:2.3:a:clamav:clamav:0.103.1:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0.103.1"
                      },
                      {
                        "last_affected": "0.103.1"
                      }
                    ],
                    "source": "CPE_STRING"
                  }
                ]
              }
            }
          ],
          "versions": [
            "0.103.0",
            "0.103.1",
            "clamav-0.103.1",
            "clamav-0.103.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-1404.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:17.196988618Z",
      "provider": "osv",
      "references": [
        "https://blog.clamav.net/2021/04/clamav-01032-security-patch-release.html"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-1404",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 429508,
  "published_at": "2021-04-08T05:15:13.267+00:00"
}