https://sourceware.org/bugzilla/show_bug.cgi?id=22113
Bug ID: 22113
Summary: Heap out of bounds read in bfd_getl16()
Product: binutils
Version: 2.29
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: binutils
Assignee: unassigned at sourceware dot org
Reporter: fumfi.255 at gmail dot com
Target Milestone: ---
Created attachment 10404
--> https://sourceware.org/bugzilla/attachment.cgi?id=10404&action=edit
POC to trigger heap out of bounds read (objdump)
After some fuzz testing I found a crashing test case.
Version: 2.29
Command: objdump -x -Wl -R -SD objdump_hoobr_bfd_getl16
ASAN:
==6445==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x6270000188ff
at pc 0x0000006626b9 bp 0x7fff0381c340 sp 0x7fff0381c338
READ of size 1 at 0x6270000188ff thread T0
#0 0x6626b8 in bfd_getl16 XYZ/binutils-2.29/bfd/libbfd.c:505:27
#1 0x857399 in pe_print_idata XYZ/binutils-2.29/bfd/peigen.c:1562:15
#2 0x857399 in _bfd_pe_print_private_bfd_data_common
XYZ/binutils-2.29/bfd/peigen.c:2904
#3 0x83ea08 in pe_print_private_bfd_data
XYZ/binutils-2.29/bfd/./peicode.h:336:8
#4 0x4e9b57 in dump_bfd_private_header
XYZ/binutils-2.29/binutils/./objdump.c:2920:3
#5 0x4e9b57 in dump_bfd XYZ/binutils-2.29/binutils/./objdump.c:3504
#6 0x4e8be1 in display_object_bfd
XYZ/binutils-2.29/binutils/./objdump.c:3603:7
#7 0x4e8be1 in display_any_bfd XYZ/binutils-2.29/binutils/./objdump.c:3692
#8 0x4e7d5a in display_file XYZ/binutils-2.29/binutils/./objdump.c:3713:3
#9 0x4e7d5a in main XYZ/binutils-2.29/binutils/./objdump.c:4015
#10 0x7f3a3d3c182f in __libc_start_main
(/lib/x86_64-linux-gnu/libc.so.6+0x2082f)
#11 0x419d98 in _start (XYZ/binutils-2.29/binutils/objdump+0x419d98)
0x6270000188ff is located 1 bytes to the left of 12336-byte region
[0x627000018900,0x62700001b930)
allocated by thread T0 here:
#0 0x4b85ac in malloc
/home/llvm/clang-3.9/final/llvm.src/projects/compiler-rt/lib/asan/asan_malloc_linux.cc:64:3
#1 0x6618b3 in bfd_malloc XYZ/binutils-2.29/bfd/libbfd.c:193:9
#2 0x856c9e in pe_print_idata XYZ/binutils-2.29/bfd/peigen.c:1388:8
#3 0x856c9e in _bfd_pe_print_private_bfd_data_common
XYZ/binutils-2.29/bfd/peigen.c:2904
#4 0x83ea08 in pe_print_private_bfd_data
XYZ/binutils-2.29/bfd/./peicode.h:336:8
#5 0x4e8be1 in display_object_bfd
XYZ/binutils-2.29/binutils/./objdump.c:3603:7
#6 0x4e8be1 in display_any_bfd XYZ/binutils-2.29/binutils/./objdump.c:3692
#7 0x4e7d5a in display_file XYZ/binutils-2.29/binutils/./objdump.c:3713:3
#8 0x4e7d5a in main XYZ/binutils-2.29/binutils/./objdump.c:4015
#9 0x7f3a3d3c182f in __libc_start_main
(/lib/x86_64-linux-gnu/libc.so.6+0x2082f)
SUMMARY: AddressSanitizer: heap-buffer-overflow
XYZ/binutils-2.29/bfd/libbfd.c:505:27 in bfd_getl16
Shadow bytes around the buggy address:
0x0c4e7fffb0c0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c4e7fffb0d0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c4e7fffb0e0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c4e7fffb0f0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c4e7fffb100: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
=>0x0c4e7fffb110: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa[fa]
0x0c4e7fffb120: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c4e7fffb130: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c4e7fffb140: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c4e7fffb150: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c4e7fffb160: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Shadow byte legend (one shadow byte represents 8 application bytes):
Addressable: 00
Partially addressable: 01 02 03 04 05 06 07
Heap left redzone: fa
Heap right redzone: fb
Freed heap region: fd
Stack left redzone: f1
Stack mid redzone: f2
Stack right redzone: f3
Stack partial redzone: f4
Stack after return: f5
Stack use after scope: f8
Global redzone: f9
Global init order: f6
Poisoned by user: f7
Container overflow: fc
Array cookie: ac
Intra object redzone: bb
ASan internal: fe
Left alloca redzone: ca
Right alloca redzone: cb
==6445==ABORTING
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