Security advisory

{
  "id": "768dc93d037d67543cf9e026d65bf9d8259cc8937481c56464ff84362e580294",
  "url": "https://osv.dev/vulnerability/CVE-2021-3402",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-3402",
    "summary": "An integer overflow and several buffer overflow reads in libyara/modules/macho/macho.c in YARA v4.0.3 and earlier could allow an attacker to either cause denial of service or information disclosure via a malicious Mach-O file. Affects all versions before libyara 4.0.4",
    "evidence": "osv:CVE-2021-3402",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2021-3402",
      "aliases": [
        "CVE-2021-3402"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/virustotal/yara",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "814b6296f4ce389c8c16b5508b56f1f3d9af554d"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:virustotal:yara:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "4.0.4"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v4.0.3",
            "v4.0.2",
            "v4.0.1",
            "v4.0.0",
            "v4.0.0-rc3",
            "v4.0.0-rc2",
            "v4.0.0-rc1",
            "v3.11.0",
            "v3.10.0-rc1",
            "v3.10.0",
            "v3.9.0",
            "v3.8.1",
            "v3.8.0",
            "v3.7.0",
            "v3.6.0",
            "v3.4.0",
            "v3.3.0",
            "v3.2.0",
            "v3.1.0",
            "v3.0.0",
            "v2.1.0",
            "v2.0.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-3402.json"
          }
        }
      ],
      "modified": "2026-10-24T10:31:02.855595852Z",
      "provider": "osv",
      "references": [
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FKNXSH5ERG6NELTXCYVJLUPJJJ2TNEBD/",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XXM224OLGI6KAOROLDPPGGCZ2OQVQ6HH/",
        "https://bugzilla.redhat.com/show_bug.cgi?id=1930175",
        "https://www.openwall.com/lists/oss-security/2021/01/29/2",
        "https://www.x41-dsec.de/lab/advisories/x41-2021-001-yara/"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*",
              "cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*"
            ],
            "vendor_product": "fedoraproject:fedora",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "33"
                  },
                  {
                    "last_affected": "33"
                  },
                  {
                    "introduced": "34"
                  },
                  {
                    "last_affected": "34"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2021-3402",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 440109,
  "published_at": "2021-05-14T21:15:07.537+00:00"
}