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binutils: CVE-2017-14729

Browse Source 
Source: binutils-gdb.git
MR: 76278
Type: Security Fix
Disposition: Backport from binutils-2_29
ChangeID: 05de8bcd22d8d0b54badcd3826cd370b3aed81de
Description:

x86: Guard against corrupted PLT

There should be only one entry in PLT for a given symbol.  Set howto to
NULL after processing a PLT entry to guard against corrupted PLT so that
the duplicated PLT entries are skipped.

PR binutils/22170

Affects: <= 2.29
(From OE-Core rev: 51fc4c8d86bc7c567794305bcc08e5054e9e204a)

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
2017-11-08 12:38:06 +05:30
committed by Richard Purdie
parent e7f53f5fe5
commit 05281ec4a6
2 changed files with 46 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

@@ -100,6 +100,7 @@ SRC_URI = "\
file://CVE-2017-9955_7.patch \
file://CVE-2017-9955_8.patch \
file://CVE-2017-9955_9.patch \
file://CVE-2017-14729.patch \
"
S = "${WORKDIR}/git"

45
meta/recipes-devtools/binutils/binutils/CVE-2017-14729.patch Normal file
View File

@@ -0,0 +1,45 @@
commit 61e3bf5f83f7e505b6bc51ef65426e5b31e6e360
Author: H.J. Lu <hjl.tools@gmail.com>
Date: Fri Sep 22 14:15:40 2017 -0700
x86: Guard against corrupted PLT
There should be only one entry in PLT for a given symbol. Set howto to
NULL after processing a PLT entry to guard against corrupted PLT so that
the duplicated PLT entries are skipped.
PR binutils/22170
Upstream-Status: Backport
CVE: CVE-2017-14729
Signed-off-by: Thiruvadi Rajaraman <trajaraman@mvista.com>
Index: git/bfd/elf-ifunc.c
===================================================================
--- git.orig/bfd/elf-ifunc.c 2017-11-08 12:34:22.063320490 +0530
+++ git/bfd/elf-ifunc.c 2017-11-08 12:34:29.995404891 +0530
@@ -473,6 +473,10 @@
memcpy (names, "@plt", sizeof ("@plt"));
names += sizeof ("@plt");
++s, ++n;
+ /* There should be only one entry in PLT for a given
+ symbol. Set howto to NULL after processing a PLT
+ entry to guard against corrupted PLT. */
+ p->howto = NULL;
}
free (plt_sym_val);
Index: git/bfd/ChangeLog
===================================================================
--- git.orig/bfd/ChangeLog 2017-11-08 12:34:29.939404297 +0530
+++ git/bfd/ChangeLog 2017-11-08 12:35:55.660271599 +0530
@@ -1,3 +1,9 @@
+2017-09-22 H.J. Lu <hongjiu.lu@intel.com>
+
+ PR binutils/22170
+ * elf-ifunc.c (elf_get_synthetic_symtab): Guard against
+ corrupted PLT.
+
2017-07-27 Nick Clifton <nickc@redhat.com>
PR 21840