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binutils: fix CVE-2019-17451

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Backport upstream fix. No upstream release version of
binutils it yet, so backport the fix independently.

(From OE-Core rev: 3693a0a8b9461521b95613a76b7fd79c86a3bf8f)

Signed-off-by: Trevor Gamblin <trevor.gamblin@windriver.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Trevor Gamblin
2019-10-25 10:11:45 -07:00
committed by Richard Purdie
parent ab808af9fd
commit efea2749d2
2 changed files with 52 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files
meta/recipes-devtools/binutils/binutils-2.32.inc
+1
View File
@@ -50,6 +50,7 @@ SRC_URI = "\
file://CVE-2019-14250.patch \ file://CVE-2019-14250.patch \
file://CVE-2019-14444.patch \ file://CVE-2019-14444.patch \
file://CVE-2019-17450.patch \ file://CVE-2019-17450.patch \
file://CVE-2019-17451.patch \
" "
S = "${WORKDIR}/git" S = "${WORKDIR}/git"
meta/recipes-devtools/binutils/binutils/CVE-2019-17451.patch
+51
View File
@@ -0,0 +1,51 @@
From 0192438051a7e781585647d5581a2a6f62fda362 Mon Sep 17 00:00:00 2001
From: Alan Modra <amodra@gmail.com>
Date: Wed, 9 Oct 2019 10:47:13 +1030
Subject: [PATCH] PR25070, SEGV in function _bfd_dwarf2_find_nearest_line
Selectively backporting fix for bfd/dwarf2.c, but not the ChangeLog
file. There are newer versions of binutils, but none of them contain the
commit fixing CVE-2019-17451, so backport it to master and zeus.
Upstream-Status: Backport
[https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=336bfbeb1848]
CVE: CVE-2019-17451
Signed-off-by: Trevor Gamblin <trevor.gamblin@windriver.com>
Evil testcase with two debug info sections, with sizes of 2aaaabac4ec1
and ffffd5555453b140 result in a total size of 1. Reading the first
section of course overflows the buffer and tramples on other memory.
PR 25070
* dwarf2.c (_bfd_dwarf2_slurp_debug_info): Catch overflow of
total_size calculation.
---
bfd/dwarf2.c | 11 ++++++++++-
1 file changed, 10 insertions(+), 1 deletion(-)
diff --git a/bfd/dwarf2.c b/bfd/dwarf2.c
index 0b4e485582..a91597b1d0 100644
--- a/bfd/dwarf2.c
+++ b/bfd/dwarf2.c
@@ -4426,7 +4426,16 @@ _bfd_dwarf2_slurp_debug_info (bfd *abfd, bfd *debug_bfd,
for (total_size = 0;
msec;
msec = find_debug_info (debug_bfd, debug_sections, msec))
- total_size += msec->size;
+ {
+ /* Catch PR25070 testcase overflowing size calculation here. */
+ if (total_size + msec->size < total_size
+ || total_size + msec->size < msec->size)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ return FALSE;
+ }
+ total_size += msec->size;
+ }
stash->info_ptr_memory = (bfd_byte *) bfd_malloc (total_size);
if (stash->info_ptr_memory == NULL)
--
2.23.0