[Bug binutils/24242] New: readelf: heap buffer overflow in byte_get_little_endian

[spinpx at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=24242

            Bug ID: 24242
           Summary: readelf: heap buffer overflow in
                    byte_get_little_endian
           Product: binutils
           Version: 2.33 (HEAD)
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: binutils
          Assignee: unassigned at sourceware dot org
          Reporter: spinpx at gmail dot com
  Target Milestone: ---

Created attachment 11622
  --> https://sourceware.org/bugzilla/attachment.cgi?id=11622&action=edit
Heap buffer overflow input

- Intel Xeon Gold 5118 processors and 256 GB memory
- Linux n18-065-139 4.19.0-1-amd64 #1 SMP Debian 4.19.12-1 (2018-12-22) x86_64
GNU/Linux
- clang version 4.0.0 (tags/RELEASE_400/final)
- version: commit c72e75a64030b0f6535a80481f37968ad55c333a (Feb 19 2019)
- run: readelf -a input_file

- asan_report:
ELF Header:
  Magic:   7f 45 4c 46 01 01 01 00 00 00 00 00 34 00 20 e9 
  Class:                             ELF32
  Data:                              2's complement, little endian
  Version:                           1 (current)
  OS/ABI:                            UNIX - System V
  ABI Version:                       0
  Type:                              EXEC (Executable file)
  Machine:                           Intel IA-64
  Version:                           0xee000001
  Entry point address:               0x8048074
  Start of program headers:          52 (bytes into file)
  Start of section headers:          164 (bytes into file)
  Flags:                             0xde000000, 32-bit
  Size of this header:               51 (bytes)
  Size of program headers:           32 (bytes)
  Number of program headers:         2
  Size of section headers:           40 (bytes)
  Number of section headers:         4
  Section header string table index: 3
readelf: Error: Reading 160 bytes extends past end of file for section headers
readelf: Error: Section headers are not available!
=================================================================
==328304==ERROR: AddressSanitizer: heap-buffer-overflow on address
0x60d0000000c1 at pc 0x0000005dd1d6 bp 0x7ffc427f3900 sp 0x7ffc427f38f8
READ of size 1 at 0x60d0000000c1 thread T0
    #0 0x5dd1d5 in byte_get_little_endian
/mnt/raid/user/chenpeng/FuzzingBench/binutils/binutils-gdb/binutils/elfcomm.c:210:22
    #1 0x56f778 in print_ia64_vms_note
/mnt/raid/user/chenpeng/FuzzingBench/binutils/binutils-gdb/binutils/readelf.c:17982:24
    #2 0x56c09f in process_note
/mnt/raid/user/chenpeng/FuzzingBench/binutils/binutils-gdb/binutils/readelf.c:18579:12
    #3 0x56a944 in process_notes_at
/mnt/raid/user/chenpeng/FuzzingBench/binutils/binutils-gdb/binutils/readelf.c:18769:13
    #4 0x5693a9 in process_corefile_note_segments
/mnt/raid/user/chenpeng/FuzzingBench/binutils/binutils-gdb/binutils/readelf.c:18799:8
    #5 0x5691c6 in process_note_sections
/mnt/raid/user/chenpeng/FuzzingBench/binutils/binutils-gdb/binutils/readelf.c:18927:12
    #6 0x524199 in process_notes
/mnt/raid/user/chenpeng/FuzzingBench/binutils/binutils-gdb/binutils/readelf.c:18940:12
    #7 0x505c9d in process_object
/mnt/raid/user/chenpeng/FuzzingBench/binutils/binutils-gdb/binutils/readelf.c:19303:9
    #8 0x4f547d in process_file
/mnt/raid/user/chenpeng/FuzzingBench/binutils/binutils-gdb/binutils/readelf.c:19715:13
    #9 0x4f3ec8 in main
/mnt/raid/user/chenpeng/FuzzingBench/binutils/binutils-gdb/binutils/readelf.c:19774:11
    #10 0x7fe5604f009a in __libc_start_main
(/lib/x86_64-linux-gnu/libc.so.6+0x2409a)
    #11 0x41d4b9 in _start
(/mnt/raid/user/chenpeng/FuzzingBench/build/asan/install/bin/readelf+0x41d4b9)

0x60d0000000c1 is located 0 bytes to the right of 129-byte region
[0x60d000000040,0x60d0000000c1)
allocated by thread T0 here:
    #0 0x4c41ac in malloc
/scratch/llvm/clang-4/xenial/final/llvm.src/projects/compiler-rt/lib/asan/asan_malloc_linux.cc:66:3
    #1 0x4f179f in get_data
/mnt/raid/user/chenpeng/FuzzingBench/binutils/binutils-gdb/binutils/readelf.c:426:9
    #2 0x56965e in process_notes_at
/mnt/raid/user/chenpeng/FuzzingBench/binutils/binutils-gdb/binutils/readelf.c:18635:36
    #3 0x5693a9 in process_corefile_note_segments
/mnt/raid/user/chenpeng/FuzzingBench/binutils/binutils-gdb/binutils/readelf.c:18799:8
    #4 0x5691c6 in process_note_sections
/mnt/raid/user/chenpeng/FuzzingBench/binutils/binutils-gdb/binutils/readelf.c:18927:12
    #5 0x524199 in process_notes
/mnt/raid/user/chenpeng/FuzzingBench/binutils/binutils-gdb/binutils/readelf.c:18940:12
    #6 0x505c9d in process_object
/mnt/raid/user/chenpeng/FuzzingBench/binutils/binutils-gdb/binutils/readelf.c:19303:9
    #7 0x4f547d in process_file
/mnt/raid/user/chenpeng/FuzzingBench/binutils/binutils-gdb/binutils/readelf.c:19715:13
    #8 0x4f3ec8 in main
/mnt/raid/user/chenpeng/FuzzingBench/binutils/binutils-gdb/binutils/readelf.c:19774:11
    #9 0x7fe5604f009a in __libc_start_main
(/lib/x86_64-linux-gnu/libc.so.6+0x2409a)

SUMMARY: AddressSanitizer: heap-buffer-overflow
/mnt/raid/user/chenpeng/FuzzingBench/binutils/binutils-gdb/binutils/elfcomm.c:210:22
in byte_get_little_endian
Shadow bytes around the buggy address:
  0x0c1a7fff7fc0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c1a7fff7fd0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c1a7fff7fe0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c1a7fff7ff0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c1a7fff8000: fa fa fa fa fa fa fa fa 00 00 00 00 00 00 00 00
=>0x0c1a7fff8010: 00 00 00 00 00 00 00 00[01]fa fa fa fa fa fa fa
  0x0c1a7fff8020: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c1a7fff8030: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c1a7fff8040: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c1a7fff8050: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c1a7fff8060: 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
==328304==ABORTING

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