[Nasm-bugs] [Bug 3392666] New: heap-buffer-overflow in asm/preproc.c:4893

[noreply-nasm at dev.nasm.us]

https://bugzilla.nasm.us/show_bug.cgi?id=3392666

            Bug ID: 3392666
           Summary: heap-buffer-overflow in asm/preproc.c:4893
           Product: NASM
           Version: 2.14.xx
          Hardware: PC
                OS: Linux
            Status: OPEN
          Severity: major
          Priority: Medium
         Component: Assembler
          Assignee: nobody at nasm.us
          Reporter: puppet at zju.edu.cn
                CC: chang.seok.bae at intel.com, gorcunov at gmail.com,
                    hpa at zytor.com, nasm-bugs at nasm.us
     Obtained from: Build from source archive using configure

Created attachment 411763
  --> https://bugzilla.nasm.us/attachment.cgi?id=411763&action=edit
POC_1_000346

version: nasm 2.14.03rc2

OS: Ubuntu 16.04 LTS

cmd: ./nasm -i bin ./POC -o /dev/null


ASAN log:

=================================================================
==18805==ERROR: AddressSanitizer: heap-buffer-overflow on address
0x60200000fa71 at pc 0x0000004487ff bp 0x7fffffffdda0 sp 0x7fffffffdd90
READ of size 1 at 0x60200000fa71 thread T0
    #0 0x4487fe in expand_mmacro asm/preproc.c:4893
    #1 0x44a9cb in pp_getline asm/preproc.c:5255
    #2 0x408b57 in assemble_file asm/nasm.c:1488
    #3 0x404a72 in main asm/nasm.c:617
    #4 0x7ffff6ac082f in __libc_start_main
(/lib/x86_64-linux-gnu/libc.so.6+0x2082f)
    #5 0x4022a8 in _start (/data3/ASAN/nasm-2.14.03rc2/ASAN/nasm+0x4022a8)

0x60200000fa71 is located 0 bytes to the right of 1-byte region
[0x60200000fa70,0x60200000fa71)
allocated by thread T0 here:
    #0 0x7ffff6f02602 in malloc
(/usr/lib/x86_64-linux-gnu/libasan.so.2+0x98602)
    #1 0x409f7e in nasm_malloc nasmlib/malloc.c:75
    #2 0x4308d9 in new_Token asm/preproc.c:1222
    #3 0x4488fa in expand_mmacro asm/preproc.c:4901
    #4 0x44a9cb in pp_getline asm/preproc.c:5255
    #5 0x408b57 in assemble_file asm/nasm.c:1488
    #6 0x404a72 in main asm/nasm.c:617
    #7 0x7ffff6ac082f in __libc_start_main
(/lib/x86_64-linux-gnu/libc.so.6+0x2082f)

SUMMARY: AddressSanitizer: heap-buffer-overflow asm/preproc.c:4893
expand_mmacro
Shadow bytes around the buggy address:
  0x0c047fff9ef0: fa fa 02 fa fa fa 04 fa fa fa 02 fa fa fa 00 01
  0x0c047fff9f00: fa fa 00 fa fa fa 02 fa fa fa 02 fa fa fa 02 fa
  0x0c047fff9f10: fa fa 02 fa fa fa 04 fa fa fa 02 fa fa fa 02 fa
  0x0c047fff9f20: fa fa 02 fa fa fa 02 fa fa fa 02 fa fa fa 03 fa
  0x0c047fff9f30: fa fa 02 fa fa fa 03 fa fa fa 02 fa fa fa 04 fa
=>0x0c047fff9f40: fa fa 02 fa fa fa 02 fa fa fa 02 fa fa fa[01]fa
  0x0c047fff9f50: fa fa 04 fa fa fa 02 fa fa fa 02 fa fa fa 02 fa
  0x0c047fff9f60: fa fa 02 fa fa fa 02 fa fa fa 06 fa fa fa 02 fa
  0x0c047fff9f70: fa fa 03 fa fa fa 00 fa fa fa 04 fa fa fa 02 fa
  0x0c047fff9f80: fa fa 03 fa fa fa 04 fa fa fa 03 fa fa fa 00 01
  0x0c047fff9f90: fa fa fd fa fa fa fd fa fa fa fd fa fa fa fd 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
==18805==ABORTING

-- 
You are receiving this mail because:
You are on the CC list for the bug.
You are watching all bug changes.