Security advisory

{
  "id": "f544cf340d5374be8375e8d0b0b29bbbcbda8c97676072e244340d2eee51dcce",
  "url": "https://osv.dev/vulnerability/CVE-2021-33505",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-33505",
    "summary": "A local malicious user can circumvent the Falco detection engine through 0.28.1 by running a program that alters arguments of system calls being executed. Issue is fixed in Falco versions >= 0.29.1.",
    "evidence": "osv:CVE-2021-33505",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2021-33505",
      "aliases": [
        "CVE-2021-33505"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/falcosecurity/falco",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "f237f277e76bcb1f2008039e5f42630c9433b1c0"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:falco:falco:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "0.28.1"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "0.28.1",
            "0.28.0",
            "0.27.0",
            "0.26.1",
            "0.26.0",
            "0.25.0",
            "0.24.0",
            "0.23.0",
            "0.22.1",
            "0.22.0",
            "0.21.0",
            "0.20.0",
            "0.19.0",
            "0.18.0",
            "0.17.1",
            "0.17.0",
            "0.12.1",
            "0.6.0-test",
            "0.5.0",
            "0.4.0",
            "0.3.0",
            "v0.2.0",
            "v0.1.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-33505.json"
          }
        }
      ],
      "modified": "2026-10-20T10:54:44.145573981Z",
      "provider": "osv",
      "references": [
        "https://github.com/falcosecurity/falco/releases",
        "https://github.com/falcosecurity/falco/pull/1675"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-33505",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 386042,
  "published_at": "2021-07-15T11:15:07.9+00:00"
}