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Critical

Security advisory

Type: advisorySources: OSVCVE: CVE-2018-6948

In CCN-lite 2, the function ccnl_prefix_to_str_detailed can cause a buffer overflow, when writing a prefix to the buffer buf. The maximal size of the prefix is CCNL_MAX_PREFIX_SIZE; the buffer has the size CCNL_MAX_PREFIX_SIZE. However, when NFN is enabled, additional characters are written to the buffer (e.g., the "NFN" and "R2C" tags). Therefore, sending an NFN-R2C packet with a prefix of size CCNL_MAX_PREFIX_SIZE can cause an overflow of buf inside ccnl_prefix_to_str_detailed.

Products
Not specified
Affected versions
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Fixed versions
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CVEs
CVE-2018-6948
Confirmed fixed CVEs
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Updated in this feed
31 Oct 2026, 10:10 UTC · Revision 1

Source evidence

CVE-2018-6948

core-osv · Original source

Published 13 Feb 2018, 17:29 UTC

In CCN-lite 2, the function ccnl_prefix_to_str_detailed can cause a buffer overflow, when writing a prefix to the buffer buf. The maximal size of the prefix is CCNL_MAX_PREFIX_SIZE; the buffer has the size CCNL_MAX_PREFIX_SIZE. However, when NFN is enabled, additional characters are written to the buffer (e.g., the "NFN" and "R2C" tags). Therefore, sending an NFN-R2C packet with a prefix of size CCNL_MAX_PREFIX_SIZE can cause an overflow of buf inside ccnl_prefix_to_str_detailed.

osv:CVE-2018-6948
Complete source record
{
  "id": "d89da070e6bba1f175c8505167e2a69ab67142d04ad6c9f56df3697166597743",
  "url": "https://osv.dev/vulnerability/CVE-2018-6948",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2018-6948",
    "summary": "In CCN-lite 2, the function ccnl_prefix_to_str_detailed can cause a buffer overflow, when writing a prefix to the buffer buf. The maximal size of the prefix is CCNL_MAX_PREFIX_SIZE; the buffer has the size CCNL_MAX_PREFIX_SIZE. However, when NFN is enabled, additional characters are written to the buffer (e.g., the \"NFN\" and \"R2C\" tags). Therefore, sending an NFN-R2C packet with a prefix of size CCNL_MAX_PREFIX_SIZE can cause an overflow of buf inside ccnl_prefix_to_str_detailed.",
    "evidence": "osv:CVE-2018-6948",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2018-6948",
      "aliases": [
        "CVE-2018-6948"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/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-2018-6948.json"
          }
        }
      ],
      "modified": "2026-10-20T10:49:56.391522972Z",
      "provider": "osv",
      "references": [
        "https://github.com/cn-uofbasel/ccn-lite/issues/193"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2018-6948",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 381002,
  "published_at": "2018-02-13T17:29:00.25+00:00"
}