{
  "schema_version": "1.3.1",
  "id": "GO-2024-2961",
  "modified": "0001-01-01T00:00:00Z",
  "published": "0001-01-01T00:00:00Z",
  "aliases": [
    "CVE-2022-30636"
  ],
  "summary": "Limited directory traversal vulnerability on Windows in golang.org/x/crypto",
  "details": "httpTokenCacheKey uses path.Base to extract the expected HTTP-01 token value to lookup in the DirCache implementation. On Windows, path.Base acts differently to filepath.Base, since Windows uses a different path separator (\\ vs. /), allowing a user to provide a relative path, i.e. .well-known/acme-challenge/..\\..\\asd becomes ..\\..\\asd. The extracted path is then suffixed with +http-01, joined with the cache directory, and opened.\n\nSince the controlled path is suffixed with +http-01 before opening, the impact of this is significantly limited, since it only allows reading arbitrary files on the system if and only if they have this suffix.",
  "affected": [
    {
      "package": {
        "name": "golang.org/x/crypto",
        "ecosystem": "Go"
      },
      "ranges": [
        {
          "type": "SEMVER",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.0.0-20220525230936-793ad666bf5e"
            }
          ]
        }
      ],
      "ecosystem_specific": {
        "imports": [
          {
            "path": "golang.org/x/crypto/acme/autocert",
            "goos": [
              "windows"
            ],
            "symbols": [
              "DirCache.Delete",
              "DirCache.Get",
              "DirCache.Put",
              "HostWhitelist",
              "Manager.GetCertificate",
              "Manager.Listener",
              "NewListener",
              "listener.Accept",
              "listener.Close"
            ]
          }
        ]
      }
    }
  ],
  "references": [
    {
      "type": "FIX",
      "url": "https://go.dev/cl/408694"
    },
    {
      "type": "REPORT",
      "url": "https://go.dev/issue/53082"
    }
  ],
  "credits": [
    {
      "name": "Juho Nurminen of Mattermost"
    }
  ],
  "database_specific": {
    "url": "https://pkg.go.dev/vuln/GO-2024-2961",
    "review_status": "REVIEWED"
  }
}