Security advisory

{
  "id": "bb11dfc93c7678207247a945545f362f9658b4d0ce031fcdc99b36439db305ee",
  "url": "https://osv.dev/vulnerability/CVE-2018-17019",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2018-17019",
    "summary": "In Bro through 2.5.5, there is a DoS in IRC protocol names command parsing in analyzer/protocol/irc/IRC.cc.",
    "evidence": "osv:CVE-2018-17019",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2018-17019",
      "aliases": [
        "CVE-2018-17019"
      ],
      "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/bro/bro",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "697aff2c0d569a8db1ca6b990a10838665a002c8"
                },
                {
                  "fixed": "c2b18849f8bb833253538f5dfedb4ed1dc176a30"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:bro:bro:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "2.5.5"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "c2b18849f8bb833253538f5dfedb4ed1dc176a30"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v2.5.5",
            "v2.5.4",
            "v2.5.3",
            "v2.5.2",
            "v2.5.1",
            "v2.5.1-beta",
            "v2.5",
            "v2.5-beta2",
            "v2.5-beta",
            "v2.4",
            "v2.4-beta",
            "v2.3",
            "v2.3-beta",
            "v2.2",
            "v2.2-beta",
            "v2.1",
            "v1.1",
            "v2.1-beta",
            "v2.0",
            "v2.0-beta",
            "v2.0-beta-pre",
            "v1.6-dev"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-17019.json",
            "vanir_signatures": [
              {
                "id": "CVE-2018-17019-6fd2cebe",
                "digest": {
                  "threshold": 0.9,
                  "line_hashes": [
                    "77868270333029608526007377023723104342",
                    "197616294696713652245393448113651582737",
                    "269458979685331922072839064529115824301",
                    "215176171713393582881742058038719741646",
                    "315085053996922377014046409675575957011",
                    "262883685267438665287262714275062867303",
                    "156884935239857457729986971900351574092",
                    "262207262755734626492622585168230902345",
                    "110923245719106072015242546838362036685"
                  ]
                },
                "source": "https://github.com/bro/bro/commit/c2b18849f8bb833253538f5dfedb4ed1dc176a30",
                "target": {
                  "file": "src/analyzer/protocol/irc/IRC.cc"
                },
                "deprecated": false,
                "signature_type": "Line",
                "signature_version": "v1"
              },
              {
                "id": "CVE-2018-17019-71a0b4e7",
                "digest": {
                  "length": 24683,
                  "function_hash": "129660041364571452923689316779621065090"
                },
                "source": "https://github.com/bro/bro/commit/c2b18849f8bb833253538f5dfedb4ed1dc176a30",
                "target": {
                  "file": "src/analyzer/protocol/irc/IRC.cc",
                  "function": "IRC_Analyzer::DeliverStream"
                },
                "deprecated": false,
                "signature_type": "Function",
                "signature_version": "v1"
              }
            ],
            "vanir_signatures_modified": "2026-10-20T13:34:21Z"
          }
        }
      ],
      "modified": "2026-10-20T13:34:21.096013374Z",
      "provider": "osv",
      "references": [
        "https://github.com/bro/bro/commit/c2b18849f8bb833253538f5dfedb4ed1dc176a30"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2018-17019",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 387835,
  "published_at": "2018-09-13T19:29:00.557+00:00"
}