Security advisory

{
  "id": "aadff0f096f2993f2cc05c060a4d48e69519b00fd171403c81d1b3f2a984f2de",
  "url": "https://osv.dev/vulnerability/CVE-2018-16789",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2018-16789",
    "summary": "libhttp/url.c in shellinabox through 2.20 has an implementation flaw in the HTTP request parsing logic. By sending a crafted multipart/form-data HTTP request, an attacker could exploit this to force shellinaboxd into an infinite loop, exhausting available CPU resources and taking the service down.",
    "evidence": "osv:CVE-2018-16789",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2018-16789",
      "aliases": [
        "CVE-2018-16789"
      ],
      "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/shellinabox/shellinabox",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "5c7fb5cde2d2a74775af040549bb5cb11aae6790"
                },
                {
                  "fixed": "4f0ecc31ac6f985e0dd3f5a52cbfc0e9251f6361"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:shellinabox_project:shellinabox:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "2.20"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "4f0ecc31ac6f985e0dd3f5a52cbfc0e9251f6361"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v2.20",
            "v2.19",
            "v2.18",
            "v2.17",
            "v2.16",
            "v2.15",
            "v2.15-rc2",
            "v2.14",
            "v2.13",
            "v2.12",
            "v2.11"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-16789.json",
            "vanir_signatures": [
              {
                "id": "CVE-2018-16789-95780f45",
                "digest": {
                  "threshold": 0.9,
                  "line_hashes": [
                    "108587633537507210242609878158511307392",
                    "108587633537507210242609878158511307392",
                    "55349953397407534518078989044189755933",
                    "200263102641848300981171117296208127289"
                  ]
                },
                "source": "https://github.com/shellinabox/shellinabox/commit/4f0ecc31ac6f985e0dd3f5a52cbfc0e9251f6361",
                "target": {
                  "file": "libhttp/url.c"
                },
                "deprecated": false,
                "signature_type": "Line",
                "signature_version": "v1"
              },
              {
                "id": "CVE-2018-16789-faaf7bc7",
                "digest": {
                  "length": 1668,
                  "function_hash": "312959051071918327107693244833019918451"
                },
                "source": "https://github.com/shellinabox/shellinabox/commit/4f0ecc31ac6f985e0dd3f5a52cbfc0e9251f6361",
                "target": {
                  "file": "libhttp/url.c",
                  "function": "urlParsePostBody"
                },
                "deprecated": false,
                "signature_type": "Function",
                "signature_version": "v1"
              }
            ],
            "vanir_signatures_modified": "2026-10-20T13:26:52Z"
          }
        }
      ],
      "modified": "2026-10-20T13:26:52.195905023Z",
      "provider": "osv",
      "references": [
        "https://code.google.com/archive/p/shellinabox/issues",
        "https://github.com/shellinabox/shellinabox/commit/4f0ecc31ac6f985e0dd3f5a52cbfc0e9251f6361"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2018-16789",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 387691,
  "published_at": "2019-03-21T16:00:22.547+00:00"
}