{
  "schema_version": "1.4.0",
  "id": "GHSA-54w6-vxfh-fw7f",
  "modified": "2023-01-06T20:24:36Z",
  "published": "2023-01-06T20:24:36Z",
  "aliases": [
    "CVE-2023-22465"
  ],
  "summary": "Http4s improperly parses User-Agent and Server headers",
  "details": "### Impact\n\nThe `User-Agent` and `Server` header parsers are susceptible to a fatal error on certain inputs.  In http4s, modeled headers are lazily parsed, so this only applies to services that explicitly request these typed headers. \n\n#### v0.21.x\n\n```scala\nval unsafe: Option[`User-Agent`] = req.headers.get(`User-Agent`)\n```\n\n#### v0.22.x, v0.23.x, v1.x\n\n```scala\nval unsafe: Option[`User-Agent`] = req.headers.get[`User-Agent`]\nval alsoUnsafe: Option[`Server`] = req.headers.get[Server]\n```\n\n### Patches\n\nFixes are released in 0.21.34, 0.22.15, 0.23.17, and 1.0.0-M38.\n\n### Workarounds\n\n#### Use the weakly typed header interface\n\n##### v0.21.x\n\n```scala\nval safe: Option[Header] = req.headers.get(\"User-Agent\".ci)\n// but don't do this\nval unsafe = header.map(_.parsed) \n```\n\n##### v0.22.x, v0.23.x, v1.x\n\n```scala\nval safe: Option[Header] = req.headers.get(ci\"User-Agent\")\n```",
  "severity": [
    {
      "type": "CVSS_V3",
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
    }
  ],
  "affected": [
    {
      "package": {
        "ecosystem": "Maven",
        "name": "org.http4s:http4s-core"
      },
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0.1.0"
            },
            {
              "fixed": "0.21.34"
            }
          ]
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Maven",
        "name": "org.http4s:http4s-core"
      },
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0.22.0"
            },
            {
              "fixed": "0.22.15"
            }
          ]
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Maven",
        "name": "org.http4s:http4s-core"
      },
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0.23.0"
            },
            {
              "fixed": "0.23.17"
            }
          ]
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Maven",
        "name": "org.http4s:http4s-core"
      },
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "1.0.0-M1"
            },
            {
              "fixed": "1.0.0-M38"
            }
          ]
        }
      ]
    }
  ],
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/http4s/http4s/security/advisories/GHSA-54w6-vxfh-fw7f"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-22465"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/http4s/http4s"
    }
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-20"
    ],
    "severity": "HIGH",
    "github_reviewed": true,
    "github_reviewed_at": "2023-01-06T20:24:36Z",
    "nvd_published_at": "2023-01-04T16:15:00Z"
  }
}