[Bug binutils/21579] New: heap-buffer-overflow in _bfd_hexdump

[aadamski at quarkslab dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=21579

            Bug ID: 21579
           Summary: heap-buffer-overflow in _bfd_hexdump
           Product: binutils
           Version: 2.29 (HEAD)
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: binutils
          Assignee: unassigned at sourceware dot org
          Reporter: aadamski at quarkslab dot com
  Target Milestone: ---

Hello there,

I have been fuzzing objdump with American Fuzzy Lop and AddressSanitizer.

Please find attached the minimized file causing the issue ("Input") and the
ASAN report log ("Output"). Below is the reduced stacktrace with links to the
corresponding source lines on a GitHub mirror.

The command I used was `objdump -D <file>`.

Let me know if there is any additional information I can provide.

--

Input: ab844d92312902844f829a40c6120d02.3a4b9137927f7b20fe0700ff4a74fb54.min
Output: ab844d92312902844f829a40c6120d02.3a4b9137927f7b20fe0700ff4a74fb54.txt

Error in "_bfd_hexdump": heap-buffer-overflow
  in _bfd_hexdump at bfd/vms-misc.c:110
    (see
https://github.com/bminor/binutils-gdb/blob/561bf3e950e410fbcac06523d43039f1f58150ca/bfd/vms-misc.c#L110)
  in _bfd_vms_slurp_etir at bfd/vms-alpha.c:1741
    (see
https://github.com/bminor/binutils-gdb/blob/561bf3e950e410fbcac06523d43039f1f58150ca/bfd/vms-alpha.c#L1741)
  in vms_slurp_debug at bfd/vms-alpha.c:2307
    (see
https://github.com/bminor/binutils-gdb/blob/561bf3e950e410fbcac06523d43039f1f58150ca/bfd/vms-alpha.c#L2307)
  in _bfd_vms_slurp_edbg at bfd/vms-alpha.c:2324
    (see
https://github.com/bminor/binutils-gdb/blob/561bf3e950e410fbcac06523d43039f1f58150ca/bfd/vms-alpha.c#L2324)
  in _bfd_vms_slurp_object_records at bfd/vms-alpha.c:2406
    (see
https://github.com/bminor/binutils-gdb/blob/561bf3e950e410fbcac06523d43039f1f58150ca/bfd/vms-alpha.c#L2406)
  in alpha_vms_object_p at bfd/vms-alpha.c:2584
    (see
https://github.com/bminor/binutils-gdb/blob/561bf3e950e410fbcac06523d43039f1f58150ca/bfd/vms-alpha.c#L2584)
  in bfd_check_format_matches at bfd/format.c:311
    (see
https://github.com/bminor/binutils-gdb/blob/561bf3e950e410fbcac06523d43039f1f58150ca/bfd/format.c#L311)
  in display_object_bfd at binutils/objdump.c:3602
    (see
https://github.com/bminor/binutils-gdb/blob/561bf3e950e410fbcac06523d43039f1f58150ca/binutils/objdump.c#L3602)
  in display_any_bfd at binutils/objdump.c:3693
    (see
https://github.com/bminor/binutils-gdb/blob/561bf3e950e410fbcac06523d43039f1f58150ca/binutils/objdump.c#L3693)
  in display_file at binutils/objdump.c:3714
    (see
https://github.com/bminor/binutils-gdb/blob/561bf3e950e410fbcac06523d43039f1f58150ca/binutils/objdump.c#L3714)
  in main at binutils/objdump.c:4016
    (see
https://github.com/bminor/binutils-gdb/blob/561bf3e950e410fbcac06523d43039f1f58150ca/binutils/objdump.c#L4016)

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