Security advisory

{
  "id": "c242b2d4214d7cd402947477ad5accddb9bc1fe957fe4b39a165fe3f51140a3a",
  "url": "https://osv.dev/vulnerability/CVE-2017-15721",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2017-15721",
    "summary": "In Irssi before 1.0.5, certain incorrectly formatted DCC CTCP messages could cause a NULL pointer dereference. This is a separate, but similar, issue relative to CVE-2017-9468.",
    "evidence": "osv:CVE-2017-15721",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2017-15721",
      "aliases": [
        "CVE-2017-15721"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/irssi/irssi",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "527c19803b56cc0ec84050ca63d992fbecadac1e"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:irssi:irssi:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "1.0.4"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "1.0.4",
            "1.0.3",
            "1.0.2",
            "1.0.1",
            "1.0.0",
            "0.8.17",
            "0.8.17-rc2",
            "0.8.16",
            "0.8.15",
            "0.8.14",
            "0.8.13",
            "0.8.12",
            "0.8.11",
            "0.8.10",
            "0.8.9",
            "0.8.8",
            "0.8.7",
            "0.8.6",
            "0.8.4",
            "0.8.3",
            "0.8.2",
            "0.8.1",
            "0.8.0",
            "0.7.98.CVS",
            "0.7.98.3",
            "0.7.98.2",
            "0.7.98",
            "0.7.97",
            "0.7.96",
            "0.7.95",
            "0.7.94",
            "0.7.93",
            "0.7.92",
            "0.7.91",
            "0.7.90",
            "0.7.90-cvs",
            "0.7.28",
            "0.7.27",
            "0.7.26",
            "0.7.25",
            "0.7.24",
            "0.7.23",
            "0.7.22",
            "0.7.21",
            "0.7.20.1",
            "0.7.20",
            "0.7.19",
            "0.7.18",
            "0.7.17",
            "0.7.16"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2017-15721.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:59.100505096Z",
      "provider": "osv",
      "references": [
        "https://lists.debian.org/debian-lts-announce/2017/12/msg00022.html",
        "https://www.debian.org/security/2017/dsa-4016",
        "https://irssi.org/security/irssi_sa_2017_10.txt"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*",
              "cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*",
              "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*"
            ],
            "vendor_product": "debian:debian_linux",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "7.0"
                  },
                  {
                    "last_affected": "7.0"
                  },
                  {
                    "introduced": "8.0"
                  },
                  {
                    "last_affected": "8.0"
                  },
                  {
                    "introduced": "9.0"
                  },
                  {
                    "last_affected": "9.0"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2017-15721",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 439240,
  "published_at": "2017-10-22T20:29:00.307+00:00"
}