Fix CVE-2016-6321: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-6321 https://security-tracker.debian.org/tracker/CVE-2016-6321 Patch adapted from upstream source repository (the changes to 'NEWS' don't apply to the Tar 1.29 release tarball). http://git.savannah.gnu.org/cgit/tar.git/commit/?id=7340f67b9860ea0531c1450e5aa261c50f67165d From 7340f67b9860ea0531c1450e5aa261c50f67165d Mon Sep 17 00:00:00 2001 From: Paul Eggert Date: Sat, 29 Oct 2016 21:04:40 -0700 Subject: [PATCH] When extracting, skip ".." members * NEWS: Document this. * src/extract.c (extract_archive): Skip members whose names contain "..". --- NEWS | 8 +++++++- src/extract.c | 8 ++++++++ 2 files changed, 15 insertions(+), 1 deletion(-) diff --git a/src/extract.c b/src/extract.c index f982433..7904148 100644 --- a/src/extract.c +++ b/src/extract.c @@ -1629,12 +1629,20 @@ extract_archive (void) { char typeflag; tar_extractor_t fun; + bool skip_dotdot_name; fatal_exit_hook = extract_finish; set_next_block_after (current_header); + skip_dotdot_name = (!absolute_names_option + && contains_dot_dot (current_stat_info.orig_file_name)); + if (skip_dotdot_name) + ERROR ((0, 0, _("%s: Member name contains '..'"), + quotearg_colon (current_stat_info.orig_file_name))); + if (!current_stat_info.file_name[0] + || skip_dotdot_name || (interactive_option && !confirm ("extract", current_stat_info.file_name))) { -- 2.11.0