[Bug binutils/28274] New: [strip] heap-buffer-overflow

[tricker51449 at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=28274

            Bug ID: 28274
           Summary: [strip] heap-buffer-overflow
           Product: binutils
           Version: 2.30
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: binutils
          Assignee: unassigned at sourceware dot org
          Reporter: tricker51449 at gmail dot com
  Target Milestone: ---

Created attachment 13627
  --> https://sourceware.org/bugzilla/attachment.cgi?id=13627&action=edit
crash files

Hello, 

I detected the following crash exception through fuzz testing, which I think
might be a vulnerability. 

The configuration of bin-utils is:

$ CFLAGS="-fsanitize=address" CXXFLAGS="-fsanitize=address" ./configure
--disable-shared && make -j

Here is the stack trace by address sanitizer:


==74962==ERROR: AddressSanitizer: heap-buffer-overflow on address
0x6040000004c0 at pc 0x00000050efa7 bp 0x7ffc9455e9e0 sp 0x7ffc9455e9d8
READ of size 8 at 0x6040000004c0 thread T0
    #0 0x50efa6 in group_signature (/binutils-2.30-asan/bin/strip+0x50efa6)
    #1 0x50e2f9 in is_strip_section (/binutils-2.30-asan/bin/strip+0x50e2f9)
    #2 0x504ce7 in setup_section (/binutils-2.30-asan/bin/strip+0x504ce7)
    #3 0x5d62ae in bfd_map_over_sections
(/binutils-2.30-asan/bin/strip+0x5d62ae)
    #4 0x500e58 in copy_object (/binutils-2.30-asan/bin/strip+0x500e58)
    #5 0x4fcbe1 in copy_file (/binutils-2.30-asan/bin/strip+0x4fcbe1)
    #6 0x4f759c in strip_main (/binutils-2.30-asan/bin/strip+0x4f759c)
    #7 0x4f6a3d in main (/binutils-2.30-asan/bin/strip+0x4f6a3d)
    #8 0x7fa7bc211bf6 in __libc_start_main
/build/glibc-S9d2JN/glibc-2.27/csu/../csu/libc-start.c:310
    #9 0x41b659 in _start (/binutils-2.30-asan/bin/strip+0x41b659)

0x6040000004c0 is located 0 bytes to the right of 48-byte region
[0x604000000490,0x6040000004c0)
allocated by thread T0 here:
    #0 0x4c7003 in malloc (/binutils-2.30-asan/bin/strip+0x4c7003)
    #1 0x9c0d97 in xmalloc (/binutils-2.30-asan/bin/strip+0x9c0d97)
    #2 0x500ccf in copy_object (/binutils-2.30-asan/bin/strip+0x500ccf)
    #3 0x4fcbe1 in copy_file (/binutils-2.30-asan/bin/strip+0x4fcbe1)
    #4 0x4f759c in strip_main (/binutils-2.30-asan/bin/strip+0x4f759c)
    #5 0x4f6a3d in main (/binutils-2.30-asan/bin/strip+0x4f6a3d)
    #6 0x7fa7bc211bf6 in __libc_start_main
/build/glibc-S9d2JN/glibc-2.27/csu/../csu/libc-start.c:310

SUMMARY: AddressSanitizer: heap-buffer-overflow
(/binutils-2.30-asan/bin/strip+0x50efa6) in group_signature
Shadow bytes around the buggy address:
  0x0c087fff8040: fa fa 00 00 00 00 00 05 fa fa fd fd fd fd fd fa
  0x0c087fff8050: fa fa fd fd fd fd fd fa fa fa fd fd fd fd fd fd
  0x0c087fff8060: fa fa fd fd fd fd fd fd fa fa fd fd fd fd fd fd
  0x0c087fff8070: fa fa fd fd fd fd fd fa fa fa fd fd fd fd fd fd
  0x0c087fff8080: fa fa fd fd fd fd fd fd fa fa fd fd fd fd fd fa
=>0x0c087fff8090: fa fa 00 00 00 00 00 00[fa]fa fa fa fa fa fa fa
  0x0c087fff80a0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c087fff80b0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c087fff80c0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c087fff80d0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c087fff80e0: 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
==74962==ABORTING


Thanks & Best Regards

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