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binutils: CVE-2017-8421

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Source: git://sourceware.org/git/binutils-gdb.git
MR: 74140
Type: Security Fix
Disposition: Backport from binutils-2_29
ChangeID: 5f6dd48c427de8663c5a80af6db44ce5c579d42c
Description:

Prevent memory exhaustion from a corrupt PE binary with an overlarge number of relocs.

PR 21440
 * objdump.c (dump_relocs_in_section): Check for an excessive
   number of relocs before attempting to dump them.

Affects: <= 2.29

Author: Alan Modra <amodra@gmail.com>
(From OE-Core rev: 09c642a70e2a12dcc01ffe45c333011a142c02a7)

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
2017-09-13 17:14:14 +05:30
committed by Richard Purdie
parent 52bc287aca
commit fdee751f82
2 changed files with 52 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
meta/recipes-devtools/binutils/binutils-2.27.inc
View File

@@ -72,6 +72,7 @@ SRC_URI = "\
file://CVE-2017-8397.patch \ file://CVE-2017-8397.patch \
file://CVE-2017-7300.patch \ file://CVE-2017-7300.patch \
file://CVE-2017-8396.patch \ file://CVE-2017-8396.patch \
file://CVE-2017-8421.patch \
" "
S = "${WORKDIR}/git" S = "${WORKDIR}/git"

51
meta/recipes-devtools/binutils/binutils/CVE-2017-8421.patch Normal file
View File

@@ -0,0 +1,51 @@
commit 39ff1b79f687b65f4144ddb379f22587003443fb
Author: Nick Clifton <nickc@redhat.com>
Date: Tue May 2 11:54:53 2017 +0100
Prevent memory exhaustion from a corrupt PE binary with an overlarge number of relocs.
PR 21440
* objdump.c (dump_relocs_in_section): Check for an excessive
number of relocs before attempting to dump them.
Upstream-Status: Backport
CVE: CVE-2017-8421
Signed-off-by: Thiruvadi Rajaraman <trajaraman@mvista.com>
Index: git/binutils/objdump.c
===================================================================
--- git.orig/binutils/objdump.c 2017-09-05 11:34:23.140802515 +0530
+++ git/binutils/objdump.c 2017-09-05 11:34:28.716824776 +0530
@@ -3238,6 +3238,14 @@
return;
}
+ if ((bfd_get_file_flags (abfd) & (BFD_IN_MEMORY | BFD_LINKER_CREATED)) == 0
+ && relsize > get_file_size (bfd_get_filename (abfd)))
+ {
+ printf (" (too many: 0x%x)\n", section->reloc_count);
+ bfd_set_error (bfd_error_file_truncated);
+ bfd_fatal (bfd_get_filename (abfd));
+ }
+
relpp = (arelent **) xmalloc (relsize);
relcount = bfd_canonicalize_reloc (abfd, section, relpp, syms);
Index: git/binutils/ChangeLog
===================================================================
--- git.orig/binutils/ChangeLog 2017-09-05 11:34:28.040822070 +0530
+++ git/binutils/ChangeLog 2017-09-05 11:36:02.413217129 +0530
@@ -4,6 +4,12 @@
* rddbg.c (read_symbol_stabs_debugging_info): Check for an empty
string whilst concatenating symbol names.
+2017-05-02 Nick Clifton <nickc@redhat.com>
+
+ PR 21440
+ * objdump.c (dump_relocs_in_section): Check for an excessive
+ number of relocs before attempting to dump them.
+
2017-02-14 Nick Clifton <nickc@redhat.com>
PR binutils/21157