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Fix problems with the ar program reported in FSF PR 17533. 

Resolves: BZ #1162666, #1162655
This commit is contained in:
Nick Clifton 2014-11-13 11:41:23 +00:00
parent f396ddc9f7
commit ea1b2220db
2 changed files with 206 additions and 1 deletions
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199
binutils-2.24-corrupt-ar.patch Normal file
View File

@ -0,0 +1,199 @@
diff -cpr ../binutils-2.24.orig/bfd/archive.c ./bfd/archive.c
*** ../binutils-2.24.orig/bfd/archive.c 2014-11-13 11:08:46.720741346 +0000
--- ./bfd/archive.c 2014-11-13 11:12:38.908876606 +0000
*************** _bfd_slurp_extended_name_table (bfd *abf
*** 1299,1304 ****
--- 1299,1306 ----
{
byebye:
free (namedata);
+ bfd_ardata (abfd)->extended_names = NULL;
+ bfd_ardata (abfd)->extended_names_size = 0;
return FALSE;
}
diff -cpr ../binutils-2.24.orig/binutils/ar.c ./binutils/ar.c
*** ../binutils-2.24.orig/binutils/ar.c 2014-11-13 11:08:46.808741776 +0000
--- ./binutils/ar.c 2014-11-13 11:10:10.510151199 +0000
*************** extract_file (bfd *abfd)
*** 1031,1036 ****
--- 1031,1045 ----
bfd_size_type size;
struct stat buf;
+ /* PR binutils/17533: Do not allow directory traversal
+ outside of the current directory tree. */
+ if (! is_valid_archive_path (bfd_get_filename (abfd)))
+ {
+ non_fatal (_("illegal pathname found in archive member: %s"),
+ bfd_get_filename (abfd));
+ return;
+ }
+
if (bfd_stat_arch_elt (abfd, &buf) != 0)
/* xgettext:c-format */
fatal (_("internal stat error on %s"), bfd_get_filename (abfd));
Only in ./binutils: ar.c.orig
diff -cpr ../binutils-2.24.orig/binutils/bucomm.c ./binutils/bucomm.c
*** ../binutils-2.24.orig/binutils/bucomm.c 2014-11-13 11:08:46.791741693 +0000
--- ./binutils/bucomm.c 2014-11-13 11:10:10.511151188 +0000
*************** bfd_get_archive_filename (const bfd *abf
*** 624,626 ****
--- 624,652 ----
bfd_get_filename (abfd));
return buf;
}
+
+ /* Returns TRUE iff PATHNAME, a filename of an archive member,
+ is valid for writing. For security reasons absolute paths
+ and paths containing /../ are not allowed. See PR 17533. */
+
+ bfd_boolean
+ is_valid_archive_path (char const * pathname)
+ {
+ const char * n = pathname;
+
+ if (IS_ABSOLUTE_PATH (n))
+ return FALSE;
+
+ while (*n)
+ {
+ if (*n == '.' && *++n == '.' && ( ! *++n || IS_DIR_SEPARATOR (*n)))
+ return FALSE;
+
+ while (*n && ! IS_DIR_SEPARATOR (*n))
+ n++;
+ while (IS_DIR_SEPARATOR (*n))
+ n++;
+ }
+
+ return TRUE;
+ }
diff -cpr ../binutils-2.24.orig/binutils/bucomm.h ./binutils/bucomm.h
*** ../binutils-2.24.orig/binutils/bucomm.h 2014-11-13 11:08:46.798741727 +0000
--- ./binutils/bucomm.h 2014-11-13 11:10:10.511151188 +0000
*************** bfd_vma parse_vma (const char *, const c
*** 58,63 ****
--- 58,65 ----
off_t get_file_size (const char *);
+ bfd_boolean is_valid_archive_path (char const *);
+
extern char *program_name;
/* filemode.c */
diff -cpr ../binutils-2.24.orig/binutils/doc/binutils.texi ./binutils/doc/binutils.texi
*** ../binutils-2.24.orig/binutils/doc/binutils.texi 2014-11-13 11:08:46.955742495 +0000
--- ./binutils/doc/binutils.texi 2014-11-13 11:10:10.513151165 +0000
*************** a normal archive. Instead the elements
*** 234,240 ****
individually to the second archive.
The paths to the elements of the archive are stored relative to the
! archive itself.
@cindex compatibility, @command{ar}
@cindex @command{ar} compatibility
--- 234,241 ----
individually to the second archive.
The paths to the elements of the archive are stored relative to the
! archive itself. For security reasons absolute paths and paths with a
! @code{/../} component are not allowed.
@cindex compatibility, @command{ar}
@cindex @command{ar} compatibility
diff -cpr ../binutils-2.24.orig/binutils/objcopy.c ./binutils/objcopy.c
*** ../binutils-2.24.orig/binutils/objcopy.c 2014-11-13 11:08:46.798741727 +0000
--- ./binutils/objcopy.c 2014-11-13 11:10:10.514151156 +0000
*************** copy_archive (bfd *ibfd, bfd *obfd, cons
*** 2182,2187 ****
--- 2182,2197 ----
bfd_boolean del = TRUE;
bfd_boolean ok_object;
+ /* PR binutils/17533: Do not allow directory traversal
+ outside of the current directory tree by archive members. */
+ if (! is_valid_archive_path (bfd_get_filename (this_element)))
+ {
+ non_fatal (_("illegal pathname found in archive member: %s"),
+ bfd_get_filename (this_element));
+ status = 1;
+ goto cleanup_and_exit;
+ }
+
/* Create an output file for this member. */
output_name = concat (dir, "/",
bfd_get_filename (this_element), (char *) 0);
*************** copy_archive (bfd *ibfd, bfd *obfd, cons
*** 2191,2198 ****
{
output_name = make_tempdir (output_name);
if (output_name == NULL)
! fatal (_("cannot create tempdir for archive copying (error: %s)"),
! strerror (errno));
l = (struct name_list *) xmalloc (sizeof (struct name_list));
l->name = output_name;
--- 2201,2212 ----
{
output_name = make_tempdir (output_name);
if (output_name == NULL)
! {
! non_fatal (_("cannot create tempdir for archive copying (error: %s)"),
! strerror (errno));
! status = 1;
! goto cleanup_and_exit;
! }
l = (struct name_list *) xmalloc (sizeof (struct name_list));
l->name = output_name;
*************** copy_archive (bfd *ibfd, bfd *obfd, cons
*** 2234,2240 ****
{
bfd_nonfatal_message (output_name, NULL, NULL, NULL);
status = 1;
! return;
}
if (ok_object)
--- 2248,2254 ----
{
bfd_nonfatal_message (output_name, NULL, NULL, NULL);
status = 1;
! goto cleanup_and_exit;
}
if (ok_object)
*************** copy_archive (bfd *ibfd, bfd *obfd, cons
*** 2295,2301 ****
{
status = 1;
bfd_nonfatal_message (filename, NULL, NULL, NULL);
- return;
}
filename = bfd_get_filename (ibfd);
--- 2309,2314 ----
*************** copy_archive (bfd *ibfd, bfd *obfd, cons
*** 2303,2311 ****
{
status = 1;
bfd_nonfatal_message (filename, NULL, NULL, NULL);
- return;
}
/* Delete all the files that we opened. */
for (l = list; l != NULL; l = l->next)
{
--- 2316,2324 ----
{
status = 1;
bfd_nonfatal_message (filename, NULL, NULL, NULL);
}
+ cleanup_and_exit:
/* Delete all the files that we opened. */
for (l = list; l != NULL; l = l->next)
{

8
binutils.spec
View File

@ -19,7 +19,7 @@
Summary: A GNU collection of binary utilities
Name: %{?cross}binutils%{?_with_debug:-debug}
Version: 2.24
Release: 28%{?dist}
Release: 29%{?dist}
License: GPLv3+
Group: Development/Tools
URL: http://sources.redhat.com/binutils
@ -74,6 +74,7 @@ Patch29: binutils-2.24-aarch64-fix-ie-relax.patch
Patch30: binutils-HEAD-change-ld-notice-interface.patch
Patch31: binutils-2.24-corrupt-binaries.patch
Patch32: binutils-2.24-strings-default-all.patch
Patch33: binutils-2.24-corrupt-ar.patch
Provides: bundled(libiberty)
@ -210,6 +211,7 @@ using libelf instead of BFD.
%patch30 -p1 -b .ldplugin~
%patch31 -p0 -b .corrupt-binaries~
%patch32 -p0 -b .strings-all~
%patch33 -p0 -b .corrupt-ar~
# We cannot run autotools as there is an exact requirement of autoconf-2.59.
@ -524,6 +526,10 @@ exit 0
%endif # %{isnative}
%changelog
* Thu Nov 13 2014 Nick Clifton <nickc@redhat.com> - 2.24-29
- Fix problems with the ar program reported in FSF PR 17533.
Resolves: BZ #1162666, #1162655
* Fri Oct 31 2014 Nick Clifton <nickc@redhat.com> - 2.24-28
- Fix buffer overrun in ihex parser.
- Fix memory corruption in previous patch.