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binutils: CVE-2017-7302

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Source: git://sourceware.org/git/binutils-gdb.git
MR: 74218
Type: Security Fix
Disposition: Backport from binutils-2_28-branch
ChangeID: 11677f4fb24c7a49efc23ea7d54de1bf85e74b12
Description:

  Fix seg-fault running strip on a corrupt binary.

        PR binutils/20921
        * aoutx.h (squirt_out_relocs): Check for and report any relocs
        that could not be recognised.

Affects: <= 2.28

Author: Nick Clifton <nickc@redhat.com>
(From OE-Core rev: dbe4c78bee0ed36fc8789f1a13678be1b8c0bcf5)

Signed-off-by: Thiruvadi Rajaraman <trajaraman@mvista.com>
Reviewed-by: Armin Kuster <akuster@mvista.com>
Signed-off-by: Armin Kuster <akuster@mvista.com>
Signed-off-by: Armin Kuster <akuster808@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Thiruvadi Rajaraman
2017-09-04 16:39:25 +05:30
committed by Richard Purdie
parent 10e74c42ad
commit 742b9c8a28
2 changed files with 82 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files
meta/recipes-devtools/binutils/binutils-2.27.inc
+1
View File
@@ -64,6 +64,7 @@ SRC_URI = "\
file://CVE-2017-7225.patch \ file://CVE-2017-7225.patch \
file://CVE-2017-7227.patch \ file://CVE-2017-7227.patch \
file://CVE-2017-7301.patch \ file://CVE-2017-7301.patch \
file://CVE-2017-7302.patch \
" "
S = "${WORKDIR}/git" S = "${WORKDIR}/git"
meta/recipes-devtools/binutils/binutils/CVE-2017-7302.patch
+81
View File
@@ -0,0 +1,81 @@
commit e2996cc315d6ea242e1a954dc20246485ccc8512
Author: Nick Clifton <nickc@redhat.com>
Date: Mon Dec 5 14:32:30 2016 +0000
Fix seg-fault running strip on a corrupt binary.
PR binutils/20921
* aoutx.h (squirt_out_relocs): Check for and report any relocs
that could not be recognised.
Upstream-Status: Backport
CVE: CVE-2017-7302
Signed-off-by: Thiruvadi Rajaraman <trajaraman@mvista.com>
Index: git/bfd/ChangeLog
===================================================================
--- git.orig/bfd/ChangeLog 2017-09-04 15:57:38.564419146 +0530
+++ git/bfd/ChangeLog 2017-09-04 16:02:31.994883900 +0530
@@ -124,6 +124,10 @@
(aout_link_add_symbols): Fix off by one error checking for
overflow of string offset.
+ PR binutils/20921
+ * aoutx.h (squirt_out_relocs): Check for and report any relocs
+ that could not be recognised.
+
2016-12-01 Nick Clifton <nickc@redhat.com>
PR binutils/20891
Index: git/bfd/aoutx.h
===================================================================
--- git.orig/bfd/aoutx.h 2017-09-04 15:57:38.564419146 +0530
+++ git/bfd/aoutx.h 2017-09-04 16:01:08.830188291 +0530
@@ -1952,6 +1952,7 @@
PUT_WORD (abfd, g->address, natptr->r_address);
+ BFD_ASSERT (g->howto != NULL);
r_length = g->howto->size ; /* Size as a power of two. */
r_pcrel = (int) g->howto->pc_relative; /* Relative to PC? */
/* XXX This relies on relocs coming from a.out files. */
@@ -2390,16 +2391,34 @@
for (natptr = native;
count != 0;
--count, natptr += each_size, ++generic)
- MY_swap_ext_reloc_out (abfd, *generic,
- (struct reloc_ext_external *) natptr);
+ {
+ if ((*generic)->howto == NULL)
+ {
+ bfd_set_error (bfd_error_invalid_operation);
+ _bfd_error_handler (_("%B: attempt to write out unknown reloc type"), abfd);
+ return FALSE;
+ }
+ MY_swap_ext_reloc_out (abfd, *generic,
+ (struct reloc_ext_external *) natptr);
+ }
}
else
{
for (natptr = native;
count != 0;
--count, natptr += each_size, ++generic)
- MY_swap_std_reloc_out (abfd, *generic,
- (struct reloc_std_external *) natptr);
+ {
+ /* PR 20921: If the howto field has not been initialised then skip
+ this reloc. */
+ if ((*generic)->howto == NULL)
+ {
+ bfd_set_error (bfd_error_invalid_operation);
+ _bfd_error_handler (_("%B: attempt to write out unknown reloc type"), abfd);
+ return FALSE;
+ }
+ MY_swap_std_reloc_out (abfd, *generic,
+ (struct reloc_std_external *) natptr);
+ }
}
if (bfd_bwrite ((void *) native, natsize, abfd) != natsize)