{
  "schema_version": "1.3.1",
  "id": "GO-2022-0520",
  "modified": "0001-01-01T00:00:00Z",
  "published": "2022-07-28T17:23:05Z",
  "aliases": [
    "CVE-2022-32148"
  ],
  "summary": "Exposure of client IP addresses in net/http",
  "details": "Client IP adresses may be unintentionally exposed via X-Forwarded-For headers.\n\nWhen httputil.ReverseProxy.ServeHTTP is called with a Request.Header map containing a nil value for the X-Forwarded-For header, ReverseProxy sets the client IP as the value of the X-Forwarded-For header, contrary to its documentation.\n\nIn the more usual case where a Director function sets the X-Forwarded-For header value to nil, ReverseProxy leaves the header unmodified as expected.",
  "affected": [
    {
      "package": {
        "name": "stdlib",
        "ecosystem": "Go"
      },
      "ranges": [
        {
          "type": "SEMVER",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.17.12"
            },
            {
              "introduced": "1.18.0-0"
            },
            {
              "fixed": "1.18.4"
            }
          ]
        }
      ],
      "ecosystem_specific": {
        "imports": [
          {
            "path": "net/http",
            "symbols": [
              "Header.Clone"
            ]
          }
        ]
      }
    }
  ],
  "references": [
    {
      "type": "FIX",
      "url": "https://go.dev/cl/412857"
    },
    {
      "type": "FIX",
      "url": "https://go.googlesource.com/go/+/b2cc0fecc2ccd80e6d5d16542cc684f97b3a9c8a"
    },
    {
      "type": "REPORT",
      "url": "https://go.dev/issue/53423"
    },
    {
      "type": "WEB",
      "url": "https://groups.google.com/g/golang-announce/c/nqrv9fbR0zE"
    }
  ],
  "credits": [
    {
      "name": "Christian Mehlmauer"
    }
  ],
  "database_specific": {
    "url": "https://pkg.go.dev/vuln/GO-2022-0520"
  }
}