[Buildroot] [git commit branch/2017.11.x] rsync: add security fix patches

[Peter Korsgaard]

commit: https://git.buildroot.net/buildroot/commit/?id=ad635622fc92128212e3d600ef392863ad3bce92
branch: https://git.buildroot.net/buildroot/commit/?id=refs/heads/2017.11.x

Fixes CVE-2017-17433 and CVE-2017-17434: remote bypass of security
restrictions.

Signed-off-by: Baruch Siach <baruch at tkos.co.il>
Signed-off-by: Peter Korsgaard <peter at korsgaard.com>
(cherry picked from commit 7e0a002df7f3e0b74f99cdc5b6d0a0e165ba1228)
Signed-off-by: Peter Korsgaard <peter at korsgaard.com>
---
 .../0001-Check-fname-in-recv_files-sooner.patch    | 45 ++++++++++++++++++++++
 ...0002-Sanitize-xname-in-read_ndx_and_attrs.patch | 39 +++++++++++++++++++
 ...mon-filter-against-fnamecmp-in-recv_files.patch | 28 ++++++++++++++
 3 files changed, 112 insertions(+)

diff --git a/package/rsync/0001-Check-fname-in-recv_files-sooner.patch b/package/rsync/0001-Check-fname-in-recv_files-sooner.patch
new file mode 100644
index 0000000..3616960
--- /dev/null
+++ b/package/rsync/0001-Check-fname-in-recv_files-sooner.patch
@@ -0,0 +1,45 @@
+From 3e06d40029cfdce9d0f73d87cfd4edaf54be9c51 Mon Sep 17 00:00:00 2001
+From: Jeriko One <jeriko.one at gmx.us>
+Date: Thu, 2 Nov 2017 23:44:19 -0700
+Subject: [PATCH] Check fname in recv_files sooner.
+
+Signed-off-by: Baruch Siach <baruch at tkos.co.il>
+---
+Patch status: upstream commit 3e06d40029c
+
+ receiver.c | 12 ++++++------
+ 1 file changed, 6 insertions(+), 6 deletions(-)
+
+diff --git a/receiver.c b/receiver.c
+index baae3a919cdd..9fdafa152cb3 100644
+--- a/receiver.c
++++ b/receiver.c
+@@ -574,6 +574,12 @@ int recv_files(int f_in, int f_out, char *local_name)
+ 			file = dir_flist->files[cur_flist->parent_ndx];
+ 		fname = local_name ? local_name : f_name(file, fbuf);
+ 
++		if (daemon_filter_list.head
++		    && check_filter(&daemon_filter_list, FLOG, fname, 0) < 0) {
++			rprintf(FERROR, "attempt to hack rsync failed.\n");
++			exit_cleanup(RERR_PROTOCOL);
++		}
++
+ 		if (DEBUG_GTE(RECV, 1))
+ 			rprintf(FINFO, "recv_files(%s)\n", fname);
+ 
+@@ -645,12 +651,6 @@ int recv_files(int f_in, int f_out, char *local_name)
+ 
+ 		cleanup_got_literal = 0;
+ 
+-		if (daemon_filter_list.head
+-		    && check_filter(&daemon_filter_list, FLOG, fname, 0) < 0) {
+-			rprintf(FERROR, "attempt to hack rsync failed.\n");
+-			exit_cleanup(RERR_PROTOCOL);
+-		}
+-
+ 		if (read_batch) {
+ 			int wanted = redoing
+ 				   ? we_want_redo(ndx)
+-- 
+2.15.0
+
diff --git a/package/rsync/0002-Sanitize-xname-in-read_ndx_and_attrs.patch b/package/rsync/0002-Sanitize-xname-in-read_ndx_and_attrs.patch
new file mode 100644
index 0000000..1e5d371
--- /dev/null
+++ b/package/rsync/0002-Sanitize-xname-in-read_ndx_and_attrs.patch
@@ -0,0 +1,39 @@
+From 70aeb5fddd1b2f8e143276f8d5a085db16c593b9 Mon Sep 17 00:00:00 2001
+From: Jeriko One <jeriko.one at gmx.us>
+Date: Thu, 16 Nov 2017 17:05:42 -0800
+Subject: [PATCH] Sanitize xname in read_ndx_and_attrs.
+
+Signed-off-by: Baruch Siach <baruch at tkos.co.il>
+---
+Patch status: upstream commit 70aeb5fddd
+
+ rsync.c | 6 ++++++
+ 1 file changed, 6 insertions(+)
+
+diff --git a/rsync.c b/rsync.c
+index b82e59881018..a0945ba4e7f5 100644
+--- a/rsync.c
++++ b/rsync.c
+@@ -49,6 +49,7 @@ extern int flist_eof;
+ extern int file_old_total;
+ extern int keep_dirlinks;
+ extern int make_backups;
++extern int sanitize_paths;
+ extern struct file_list *cur_flist, *first_flist, *dir_flist;
+ extern struct chmod_mode_struct *daemon_chmod_modes;
+ #ifdef ICONV_OPTION
+@@ -396,6 +397,11 @@ int read_ndx_and_attrs(int f_in, int f_out, int *iflag_ptr, uchar *type_ptr,
+ 	if (iflags & ITEM_XNAME_FOLLOWS) {
+ 		if ((len = read_vstring(f_in, buf, MAXPATHLEN)) < 0)
+ 			exit_cleanup(RERR_PROTOCOL);
++
++		if (sanitize_paths) {
++			sanitize_path(buf, buf, "", 0, SP_DEFAULT);
++			len = strlen(buf);
++		}
+ 	} else {
+ 		*buf = '\0';
+ 		len = -1;
+-- 
+2.15.0
+
diff --git a/package/rsync/0003-Check-daemon-filter-against-fnamecmp-in-recv_files.patch b/package/rsync/0003-Check-daemon-filter-against-fnamecmp-in-recv_files.patch
new file mode 100644
index 0000000..b19921c
--- /dev/null
+++ b/package/rsync/0003-Check-daemon-filter-against-fnamecmp-in-recv_files.patch
@@ -0,0 +1,28 @@
+From 5509597decdbd7b91994210f700329d8a35e70a1 Mon Sep 17 00:00:00 2001
+From: Jeriko One <jeriko.one at gmx.us>
+Date: Thu, 16 Nov 2017 17:26:03 -0800
+Subject: [PATCH] Check daemon filter against fnamecmp in recv_files().
+
+Signed-off-by: Baruch Siach <baruch at tkos.co.il>
+---
+Patch status: upstream commit 5509597dec
+
+ receiver.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/receiver.c b/receiver.c
+index 9fdafa152cb3..9c46242e013c 100644
+--- a/receiver.c
++++ b/receiver.c
+@@ -722,7 +722,7 @@ int recv_files(int f_in, int f_out, char *local_name)
+ 				break;
+ 			}
+ 			if (!fnamecmp || (daemon_filter_list.head
+-			  && check_filter(&daemon_filter_list, FLOG, fname, 0) < 0)) {
++			  && check_filter(&daemon_filter_list, FLOG, fnamecmp, 0) < 0)) {
+ 				fnamecmp = fname;
+ 				fnamecmp_type = FNAMECMP_FNAME;
+ 			}
+-- 
+2.15.0
+