[OE-core] [PATCH 02/21] Tar: Security fix CVE-2019-0023

[Armin Kuster]

From: Armin Kuster <akuster at mvista.com>

Source: tar.git
MR: 97928
Type: Security Fix
Disposition: Backport from http://git.savannah.gnu.org/cgit/tar.git/commit/?id=cb07844454d8cc9fb21f53ace75975f91185a120
ChangeID: 7aee4c0daf8ce813242fe7b872583560a32bc4e3
Description:

Affects tar < 1.32

fixes CVE-2019-9923

Signed-off-by: Armin Kuster <akuster at mvista.com>
Signed-off-by: Armin Kuster <akuster808 at gmail.com>
---
 meta/recipes-extended/tar/tar/CVE-2019-9923.patch | 38 +++++++++++++++++++++++
 meta/recipes-extended/tar/tar_1.31.bb             |  1 +
 2 files changed, 39 insertions(+)
 create mode 100644 meta/recipes-extended/tar/tar/CVE-2019-9923.patch

diff --git a/meta/recipes-extended/tar/tar/CVE-2019-9923.patch b/meta/recipes-extended/tar/tar/CVE-2019-9923.patch
new file mode 100644
index 0000000..a2704c3
--- /dev/null
+++ b/meta/recipes-extended/tar/tar/CVE-2019-9923.patch
@@ -0,0 +1,38 @@
+From cb07844454d8cc9fb21f53ace75975f91185a120 Mon Sep 17 00:00:00 2001
+From: Sergey Poznyakoff <gray at gnu.org>
+Date: Mon, 14 Jan 2019 15:22:09 +0200
+Subject: [PATCH] Fix possible NULL dereference (savannah bug #55369)
+
+* src/sparse.c (pax_decode_header): Check return from find_next_block.
+
+Upstream-Status: Backport
+CVE:  CVE-2019-9923
+Affects: tar < 1.32
+Signed-off-by: Armin kuster <akuster at mvista.com>
+
+---
+ src/sparse.c | 4 ++++
+ 1 file changed, 4 insertions(+)
+
+Index: tar-1.31/src/sparse.c
+===================================================================
+--- tar-1.31.orig/src/sparse.c
++++ tar-1.31/src/sparse.c
+@@ -1267,6 +1267,8 @@ pax_decode_header (struct tar_sparse_fil
+ 	 {                                                         \
+ 	   set_next_block_after (b);                               \
+            b = find_next_block ();                                 \
++           if (!b)                                                 \
++             FATAL_ERROR ((0, 0, _("Unexpected EOF in archive"))); \
+            src = b->buffer;                                        \
+ 	   endp = b->buffer + BLOCKSIZE;                           \
+ 	 }                                                         \
+@@ -1279,6 +1281,8 @@ pax_decode_header (struct tar_sparse_fil
+       start = current_block_ordinal ();
+       set_next_block_after (current_header);
+       blk = find_next_block ();
++      if (!blk)
++        FATAL_ERROR ((0, 0, _("Unexpected EOF in archive")));
+       p = blk->buffer;
+       COPY_BUF (blk,nbuf,p);
+       if (!decode_num (&u, nbuf, TYPE_MAXIMUM (size_t)))
diff --git a/meta/recipes-extended/tar/tar_1.31.bb b/meta/recipes-extended/tar/tar_1.31.bb
index 353617e..4a9d03c 100644
--- a/meta/recipes-extended/tar/tar_1.31.bb
+++ b/meta/recipes-extended/tar/tar_1.31.bb
@@ -9,6 +9,7 @@ LIC_FILES_CHKSUM = "file://COPYING;md5=d32239bcb673463ab874e80d47fae504"
 SRC_URI = "${GNU_MIRROR}/tar/tar-${PV}.tar.bz2 \
            file://remove-gets.patch \
            file://musl_dirent.patch \
+           file://CVE-2019-9923.patch \
 "
 
 SRC_URI[md5sum] = "77afa35b696c8d760331fa0e12c2fac9"
-- 
2.7.4