diff options
Diffstat (limited to 'modules/caddyhttp/fileserver')
| -rw-r--r-- | modules/caddyhttp/fileserver/staticfiles.go | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/modules/caddyhttp/fileserver/staticfiles.go b/modules/caddyhttp/fileserver/staticfiles.go index 04728ce..fe1a4fc 100644 --- a/modules/caddyhttp/fileserver/staticfiles.go +++ b/modules/caddyhttp/fileserver/staticfiles.go @@ -26,6 +26,7 @@ import ( "os" "path" "path/filepath" + "runtime" "strconv" "strings" "time" @@ -232,6 +233,19 @@ func (fsrv *FileServer) Provision(ctx caddy.Context) error { func (fsrv *FileServer) ServeHTTP(w http.ResponseWriter, r *http.Request, next caddyhttp.Handler) error { repl := r.Context().Value(caddy.ReplacerCtxKey).(*caddy.Replacer) + if runtime.GOOS == "windows" { + // reject paths with Alternate Data Streams (ADS) + if strings.Contains(r.URL.Path, ":") { + return caddyhttp.Error(http.StatusBadRequest, fmt.Errorf("illegal ADS path")) + } + // reject paths with "8.3" short names + trimmedPath := strings.TrimRight(r.URL.Path, ". ") // Windows ignores trailing dots and spaces, sigh + if len(path.Base(trimmedPath)) <= 12 && strings.Contains(trimmedPath, "~") { + return caddyhttp.Error(http.StatusBadRequest, fmt.Errorf("illegal short name")) + } + // both of those could bypass file hiding or possibly leak information even if the file is not hidden + } + filesToHide := fsrv.transformHidePaths(repl) root := repl.ReplaceAll(fsrv.Root, ".") |