utils/tar/patches/001-CVE-2016-6321.patch

   1 From 7340f67b9860ea0531c1450e5aa261c50f67165d Mon Sep 17 00:00:00 2001
   2 From: Paul Eggert <eggert@Penguin.CS.UCLA.EDU>
   3 Date: Sat, 29 Oct 2016 21:04:40 -0700
   4 Subject: When extracting, skip ".." members
   5
   6 * src/extract.c (extract_archive): Skip members whose names
   7 contain "..".
   8 --- a/src/extract.c
   9 +++ b/src/extract.c
  10 @@ -1629,12 +1629,20 @@ extract_archive (void)
  11  {
  12    char typeflag;
  13    tar_extractor_t fun;
  14 +  bool skip_dotdot_name;
  15
  16    fatal_exit_hook = extract_finish;
  17
  18    set_next_block_after (current_header);
  19
  20 +  skip_dotdot_name = (!absolute_names_option
  21 +                     && contains_dot_dot (current_stat_info.orig_file_name));
  22 +  if (skip_dotdot_name)
  23 +    ERROR ((0, 0, _("%s: Member name contains '..'"),
  24 +           quotearg_colon (current_stat_info.orig_file_name)));
  25 +
  26    if (!current_stat_info.file_name[0]
  27 +      || skip_dotdot_name
  28        || (interactive_option
  29           && !confirm ("extract", current_stat_info.file_name)))
  30      {