https://sourceware.org/bugzilla/show_bug.cgi?id=28305
Bug ID: 28305
Summary: ojbjdump: heap-buffer-overflow in
xtensa_insnbuf_from_chars
Product: binutils
Version: 2.38 (HEAD)
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: binutils
Assignee: unassigned at sourceware dot org
Reporter: shaohua.li at inf dot ethz.ch
Target Milestone: ---
Created attachment 13649
--> https://sourceware.org/bugzilla/attachment.cgi?id=13649&action=edit
heap_poc
Hi there,
I found a heap-buffer-overflow in xtensa_insnbuf_from_chars in
xtensa-isa.c:226.
- Compiler: clang12
- Platform: Ubuntu 18.04.5 LTS, x86_64
- Reproduce: run `objdump -S heap_poc`
AddressSanitizer report:
==2811==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x60200000007d
at pc 0x000001ae6740 bp 0x7ffe45a77070 sp 0x7ffe45a77068
READ of size 1 at 0x60200000007d thread T0
#0 0x1ae673f in xtensa_insnbuf_from_chars
/binutils_latest/repo/bfd/xtensa-isa.c:226:37
#1 0x1819c75 in elf_xtensa_do_reloc
/binutils_latest/repo/bfd/elf32-xtensa.c:1972:3
#2 0x1819218 in bfd_elf_xtensa_reloc
/binutils_latest/repo/bfd/elf32-xtensa.c:2235:10
#3 0x1b4bae7 in bfd_perform_relocation
/binutils_latest/repo/bfd/reloc.c:711:14
#4 0x1b4fa9f in bfd_generic_get_relocated_section_contents
/binutils_latest/repo/bfd/reloc.c:8463:10
#5 0xae85cf in bfd_get_relocated_section_contents
/binutils_latest/repo/bfd/bfd.c:2166:10
#6 0xb11ef8 in bfd_simple_get_relocated_section_contents
/binutils_latest/repo/bfd/simple.c:298:14
#7 0xcaddac in read_section /binutils_latest/repo/bfd/./dwarf2.c:582:7
#8 0xcaaa47 in _bfd_dwarf2_slurp_debug_info
/binutils_latest/repo/bfd/./dwarf2.c:4737:13
#9 0xcaefd1 in _bfd_dwarf2_find_nearest_line
/binutils_latest/repo/bfd/./dwarf2.c:4985:9
#10 0xbd33e9 in _bfd_elf_find_nearest_line
/binutils_latest/repo/bfd/elf.c:9192:7
#11 0x4e49ea in show_line /binutils_latest/repo/binutils/./objdump.c:1784:9
#12 0x4e0b9f in disassemble_bytes
/binutils_latest/repo/binutils/./objdump.c:2770:6
#13 0x4daf10 in disassemble_section
/binutils_latest/repo/binutils/./objdump.c:3455:4
#14 0xb100da in bfd_map_over_sections
/binutils_latest/repo/bfd/section.c:1383:5
#15 0x4d1ae0 in disassemble_data
/binutils_latest/repo/binutils/./objdump.c:3599:3
#16 0x4cda84 in dump_bfd /binutils_latest/repo/binutils/./objdump.c:5006:5
#17 0x4ccb9f in display_object_bfd
/binutils_latest/repo/binutils/./objdump.c:5068:7
#18 0x4ccaa9 in display_any_bfd
/binutils_latest/repo/binutils/./objdump.c:5158:5
#19 0x4cc65c in display_file
/binutils_latest/repo/binutils/./objdump.c:5179:3
#20 0x4cb063 in main /binutils_latest/repo/binutils/./objdump.c:5529:6
#21 0x7f29a2bdf0b2 in __libc_start_main
(/lib/x86_64-linux-gnu/libc.so.6+0x270b2)
#22 0x41c61d in _start (/out_bin/objdump+0x41c61d)
0x60200000007d is located 0 bytes to the right of 13-byte region
[0x602000000070,0x60200000007d)
allocated by thread T0 here:
#0 0x4974dd in malloc (/out_bin/objdump+0x4974dd)
#1 0xb044e2 in bfd_malloc /binutils_latest/repo/bfd/libbfd.c:289:9
#2 0xcadd6d in read_section /binutils_latest/repo/bfd/./dwarf2.c:578:31
#3 0xcaaa47 in _bfd_dwarf2_slurp_debug_info
/binutils_latest/repo/bfd/./dwarf2.c:4737:13
#4 0xcaefd1 in _bfd_dwarf2_find_nearest_line
/binutils_latest/repo/bfd/./dwarf2.c:4985:9
#5 0xbd33e9 in _bfd_elf_find_nearest_line
/binutils_latest/repo/bfd/elf.c:9192:7
#6 0x4e49ea in show_line /binutils_latest/repo/binutils/./objdump.c:1784:9
#7 0x4e0b9f in disassemble_bytes
/binutils_latest/repo/binutils/./objdump.c:2770:6
#8 0x4daf10 in disassemble_section
/binutils_latest/repo/binutils/./objdump.c:3455:4
#9 0xb100da in bfd_map_over_sections
/binutils_latest/repo/bfd/section.c:1383:5
#10 0x4d1ae0 in disassemble_data
/binutils_latest/repo/binutils/./objdump.c:3599:3
#11 0x4cda84 in dump_bfd /binutils_latest/repo/binutils/./objdump.c:5006:5
#12 0x4ccb9f in display_object_bfd
/binutils_latest/repo/binutils/./objdump.c:5068:7
#13 0x4ccaa9 in display_any_bfd
/binutils_latest/repo/binutils/./objdump.c:5158:5
#14 0x4cc65c in display_file
/binutils_latest/repo/binutils/./objdump.c:5179:3
#15 0x4cb063 in main /binutils_latest/repo/binutils/./objdump.c:5529:6
#16 0x7f29a2bdf0b2 in __libc_start_main
(/lib/x86_64-linux-gnu/libc.so.6+0x270b2)
SUMMARY: AddressSanitizer: heap-buffer-overflow
/binutils_latest/repo/bfd/xtensa-isa.c:226:37 in xtensa_insnbuf_from_chars
Shadow bytes around the buggy address:
0x0c047fff7fb0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c047fff7fc0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c047fff7fd0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c047fff7fe0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c047fff7ff0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
=>0x0c047fff8000: fa fa 00 01 fa fa fd fd fa fa 04 fa fa fa 00[05]
0x0c047fff8010: fa fa 01 fa fa fa 01 fa fa fa 00 fa fa fa 00 fa
0x0c047fff8020: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c047fff8030: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c047fff8040: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c047fff8050: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
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
Freed heap region: fd
Stack left redzone: f1
Stack mid redzone: f2
Stack right redzone: f3
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
Shadow gap: cc
==2811==ABORTING
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