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archive/zip: warn about FileHeader.Name being unvalidated on read

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Updates #25849

Change-Id: I09ee928b462ab538a9d38c4e317eaeb8856919f2
Reviewed-on: https://go-review.googlesource.com/118335
Reviewed-by: Joe Tsai <thebrokentoaster@gmail.com>
This commit is contained in:
Brad Fitzpatrick 2018-06-12 19:33:23 +00:00
parent 1e721cfc43
commit fc0e1d2b6f
1 changed files with 9 additions and 1 deletions
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10
src/archive/zip/struct.go
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@ -81,9 +81,17 @@ const (
// See the zip spec for details.
type FileHeader struct {
// Name is the name of the file.
// It must be a relative path, not start with a drive letter (e.g. C:),
//
// It must be a relative path, not start with a drive letter (such as "C:"),
// and must use forward slashes instead of back slashes. A trailing slash
// indicates that this file is a directory and should have no data.
//
// When reading zip files, the Name field is populated from
// the zip file directly and is not validated for correctness.
// It is the caller's responsibility to sanitize it as
// appropriate, including canonicalizing slash directions,
// validating that paths are relative, and preventing path
// traversal through filenames ("../../../").
Name string
// Comment is any arbitrary user-defined string shorter than 64KiB.