Security advisory

{
  "id": "1ffdaa803079b6940aeadac768542077a110f003a13de1fcd0042bd69398d9db",
  "url": "https://osv.dev/vulnerability/CVE-2018-16523",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2018-16523",
    "summary": "Amazon Web Services (AWS) FreeRTOS through 1.3.1, FreeRTOS up to V10.0.1 (with FreeRTOS+TCP), and WITTENSTEIN WHIS Connect middleware TCP/IP component allow division by zero in prvCheckOptions.",
    "evidence": "osv:CVE-2018-16523",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2018-16523",
      "aliases": [
        "CVE-2018-16523"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/aws/amazon-freertos",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "1fc5e966a0f8e541c0942bd02bb3504a4a6be9c6"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:amazon:amazon_web_services_freertos:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "1.3.1"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v1.3.1",
            "v1.3.0",
            "v1.2.7",
            "v1.2.6",
            "v1.2.5",
            "v1.2.4",
            "v1.2.3",
            "v1.2.2",
            "v1.2.1",
            "v1.2.0",
            "v1.1.0",
            "v1.0.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-16523.json"
          }
        }
      ],
      "modified": "2026-10-20T10:49:44.685001236Z",
      "provider": "osv",
      "references": [
        "https://blog.zimperium.com/freertos-tcpip-stack-vulnerabilities-put-wide-range-devices-risk-compromise-smart-homes-critical-infrastructure-systems/",
        "https://github.com/aws/amazon-freertos/blob/v1.3.2/CHANGELOG.md",
        "https://blog.zimperium.com/freertos-tcpip-stack-vulnerabilities-details/"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:a:amazon:freertos:*:*:*:*:*:*:*:*"
            ],
            "vendor_product": "amazon:freertos",
            "extracted_events": [
              {
                "range": [
                  {
                    "last_affected": "10.0.1"
                  }
                ],
                "source": "CPE_RANGE"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2018-16523",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 380761,
  "published_at": "2018-12-06T23:29:00.313+00:00"
}