https://sourceware.org/bugzilla/show_bug.cgi?id=27840
Bug ID: 27840
Summary: heap-buffer-overflow on objdump -D
Product: binutils
Version: 2.37 (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 13431
--> https://sourceware.org/bugzilla/attachment.cgi?id=13431&action=edit
poc for `objdump -D`
Hi there,
I found heap-buffer-overflow issue on objdump (with flag -D) with a crafted
executable using a fuzzer.
The AddressSanitizer result is as follows:
==78175==ERROR: AddressSanitizer: heap-buffer-overflow on address
0x6020000000d2 at pc 0x0000007c003c bp 0x7ffc8e42def0 sp 0x7ffc8e42dee8
READ of size 1 at 0x6020000000d2 thread T0
#0 0x7c003b in print_insn_tic30
/data/clean/binutils-gdb/opcodes/tic30-dis.c:701:12
#1 0x4dc181 in disassemble_bytes
/data/clean/binutils-gdb/binutils/./objdump.c:2814:20
#2 0x4dc181 in disassemble_section
/data/clean/binutils-gdb/binutils/./objdump.c:3396:4
#3 0x949f7b in bfd_map_over_sections
/data/clean/binutils-gdb/bfd/section.c:1377:5
#4 0x4ce713 in disassemble_data
/data/clean/binutils-gdb/binutils/./objdump.c:3540:3
#5 0x4ce713 in dump_bfd
/data/clean/binutils-gdb/binutils/./objdump.c:4939:5
#6 0x4cb3d7 in display_object_bfd
/data/clean/binutils-gdb/binutils/./objdump.c
#7 0x4cb3d7 in display_any_bfd
/data/clean/binutils-gdb/binutils/./objdump.c:5091:5
#8 0x4ca686 in display_file
/data/clean/binutils-gdb/binutils/./objdump.c:5112:3
#9 0x4ca686 in main /data/clean/binutils-gdb/binutils/./objdump.c:5462:6
#10 0x7f44d088c0b2 in __libc_start_main
/build/glibc-eX1tMB/glibc-2.31/csu/../csu/libc-start.c:308:16
#11 0x41c5fd in _start (/data/clean/binutils-gdb/binutils/objdump+0x41c5fd)
0x6020000000d2 is located 0 bytes to the right of 2-byte region
[0x6020000000d0,0x6020000000d2)
allocated by thread T0 here:
#0 0x49785d in malloc (/data/clean/binutils-gdb/binutils/objdump+0x49785d)
#1 0x93fa23 in bfd_malloc /data/clean/binutils-gdb/bfd/libbfd.c:289:9
#2 0x4d5a30 in disassemble_section
/data/clean/binutils-gdb/binutils/./objdump.c:3154:8
#3 0x949f7b in bfd_map_over_sections
/data/clean/binutils-gdb/bfd/section.c:1377:5
SUMMARY: AddressSanitizer: heap-buffer-overflow
/data/clean/binutils-gdb/opcodes/tic30-dis.c:701:12 in print_insn_tic30
Shadow bytes around the buggy address:
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 03 fa fa fa 03 fa
=>0x0c047fff8010: fa fa 03 fa fa fa 01 fa fa fa[02]fa fa fa fa 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
0x0c047fff8060: 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
==78175==ABORTING
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