Security advisory

{
  "id": "3997d45a416eb298f24354adb534e4fa6aa964593563134c54f8f034b9ee344c",
  "url": "https://osv.dev/vulnerability/CVE-2018-6480",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2018-6480",
    "summary": "A type confusion issue was discovered in CCN-lite 2, leading to a memory access violation and a failure of the nonce feature (which, for example, helped with loop prevention). ccnl_fwd_handleInterest assumes that the union member s is of type ccnl_pktdetail_ndntlv_s. However, if the type is in fact struct ccnl_pktdetail_ccntlv_s or struct ccnl_pktdetail_iottlv_s, the memory at that point is either uninitialised or points to data that is not a nonce, which renders the code using the local variable nonce pointless. A later nonce check is insufficient.",
    "evidence": "osv:CVE-2018-6480",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2018-6480",
      "aliases": [
        "CVE-2018-6480"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/cn-uofbasel/ccn-lite",
              "type": "GIT",
              "events": [
                {
                  "introduced": "063fd8ad7e74f24410ef8fd9e23673c532500df5"
                },
                {
                  "last_affected": "063fd8ad7e74f24410ef8fd9e23673c532500df5"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:ccn-lite:ccn-lite:2.0.0:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "2.0.0"
                      },
                      {
                        "last_affected": "2.0.0"
                      }
                    ],
                    "source": "CPE_STRING"
                  }
                ]
              }
            }
          ],
          "versions": [
            "2.0.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-6480.json"
          }
        }
      ],
      "modified": "2026-10-20T10:49:56.387999169Z",
      "provider": "osv",
      "references": [
        "https://github.com/cn-uofbasel/ccn-lite/issues/159"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2018-6480",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 381000,
  "published_at": "2018-01-31T20:29:00.79+00:00"
}