https://sourceware.org/bugzilla/show_bug.cgi?id=22060
Bug ID: 22060
Summary: Heap buffer overflow in elf_read_notes()
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 10385
--> https://sourceware.org/bugzilla/attachment.cgi?id=10385&action=edit
POC to trigger heap buffer overflow (objdump)
After some fuzz testing I found a crashing test case.
Version: 2.29
Command: objdump -x -Wl -R -SD objdump_hbo_elf_read_notes
ASAN:
==10130==ERROR: AddressSanitizer: heap-buffer-overflow on address
0x60200000ef4f at pc 0x0000006e843d bp 0x7ffcd41d0ad0 sp 0x7ffcd41d0ac8
WRITE of size 1 at 0x60200000ef4f thread T0
#0 0x6e843c in elf_read_notes XYZ/binutils-2.29/bfd/elf.c:10991:13
#1 0x6e843c in bfd_section_from_phdr XYZ/binutils-2.29/bfd/elf.c:2983
#2 0x6cf1ea in bfd_elf64_core_file_p
XYZ/binutils-2.29/bfd/./elfcore.h:277:11
#3 0x65bf6c in bfd_check_format_matches
XYZ/binutils-2.29/bfd/format.c:311:14
#4 0x4e8f3a in display_object_bfd
XYZ/binutils-2.29/binutils/./objdump.c:3621:7
#5 0x4e8f3a in display_any_bfd XYZ/binutils-2.29/binutils/./objdump.c:3692
#6 0x4e7d5a in display_file XYZ/binutils-2.29/binutils/./objdump.c:3713:3
#7 0x4e7d5a in main XYZ/binutils-2.29/binutils/./objdump.c:4015
#8 0x7fd0529a982f in __libc_start_main
(/lib/x86_64-linux-gnu/libc.so.6+0x2082f)
#9 0x419d98 in _start (XYZ/binutils-2.29/binutils/objdump+0x419d98)
0x60200000ef4f is located 1 bytes to the left of 1-byte region
[0x60200000ef50,0x60200000ef51)
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
SUMMARY: AddressSanitizer: heap-buffer-overflow
XYZ/binutils-2.29/bfd/elf.c:10991:13 in elf_read_notes
Shadow bytes around the buggy address:
0x0c047fff9d90: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c047fff9da0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c047fff9db0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c047fff9dc0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c047fff9dd0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
=>0x0c047fff9de0: fa fa fa fa fa fa fa fa fa[fa]01 fa fa fa 00 01
0x0c047fff9df0: fa fa 00 04 fa fa 00 04 fa fa 00 04 fa fa fd fa
0x0c047fff9e00: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c047fff9e10: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c047fff9e20: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c047fff9e30: 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
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
==10130==ABORTING
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