[Bug binutils/21434] New: heap buffer overflow in objdump

[dungnguy at comp dot nus.edu.sg]

https://sourceware.org/bugzilla/show_bug.cgi?id=21434

            Bug ID: 21434
           Summary: heap buffer overflow in objdump
           Product: binutils
           Version: 2.28
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: binutils
          Assignee: unassigned at sourceware dot org
          Reporter: dungnguy at comp dot nus.edu.sg
  Target Milestone: ---

Created attachment 10021
  --> https://sourceware.org/bugzilla/attachment.cgi?id=10021&action=edit
Input

Dear All,

This bug was found with AFLGo, a directed version of AFL/AFLFast. Thanks also
to Marcel Böhme and Van-Thuan Pham.

This bug was found on Ubuntu 14.04 64-bit & binutils was checked out from main
repository at git://sourceware.org/git/binutils-gdb.git. Its commit is
a49abe0bb18e04d3a4b692995fcfae70cd470775 (Tue Apr 25 00:00:36 2017).

binutils was built with ASAN using gcc-6.2 and clang-3.4. The configure command
was:

CC=clang CFLAGS="-DFORTIFY_SOURCE=2 -fstack-protector-all
-fsanitize=undefined,address -fno-omit-frame-pointer -g -Wno-error"
../configure --disable-shared --disable-gdb --disable-libdecnumber
--disable-readline --disable-sim

To reproduce:
Download the attached file - bug_8
objdump -W bug_8

ASAN says:
==21468==ERROR: AddressSanitizer: heap-buffer-overflow on address
0x611000009dbf at pc 0x000001112c62 bp 0x7ffff9c91060 sp 0x7ffff9c91058
READ of size 1 at 0x611000009dbf thread T0
    #0 0x1112c61 in bfd_perform_relocation
/home/ubuntu/binutils-analysis/binutils-gdb/obj-asan/bfd/../../bfd/reloc.c:885:11
    #1 0x1120f83 in bfd_generic_get_relocated_section_contents
/home/ubuntu/binutils-analysis/binutils-gdb/obj-asan/bfd/../../bfd/reloc.c:8170:10
    #2 0x763254 in bfd_get_relocated_section_contents
/home/ubuntu/binutils-analysis/binutils-gdb/obj-asan/bfd/../../bfd/bfd.c:1624:10
    #3 0x7b8969 in bfd_simple_get_relocated_section_contents
/home/ubuntu/binutils-analysis/binutils-gdb/obj-asan/bfd/../../bfd/simple.c:264:14
    #4 0x4f51b4 in load_specific_debug_section
/home/ubuntu/binutils-analysis/binutils-gdb/obj-asan/binutils/../../binutils/objdump.c:2482:13
    #5 0x508341 in dump_dwarf_section
/home/ubuntu/binutils-analysis/binutils-gdb/obj-asan/binutils/../../binutils/objdump.c:2620:6
    #6 0x7b437c in bfd_map_over_sections
/home/ubuntu/binutils-analysis/binutils-gdb/obj-asan/bfd/../../bfd/section.c:1395:5
    #7 0x500415 in dump_dwarf
/home/ubuntu/binutils-analysis/binutils-gdb/obj-asan/binutils/../../binutils/objdump.c:2689:3
    #8 0x4fac4b in dump_bfd
/home/ubuntu/binutils-analysis/binutils-gdb/obj-asan/binutils/../../binutils/objdump.c:3527:5
    #9 0x4f9d41 in display_object_bfd
/home/ubuntu/binutils-analysis/binutils-gdb/obj-asan/binutils/../../binutils/objdump.c:3594:7
    #10 0x4f9c1a in display_any_bfd
/home/ubuntu/binutils-analysis/binutils-gdb/obj-asan/binutils/../../binutils/objdump.c:3683:5
    #11 0x4f91f7 in display_file
/home/ubuntu/binutils-analysis/binutils-gdb/obj-asan/binutils/../../binutils/objdump.c:3704:3
    #12 0x4f8344 in main
/home/ubuntu/binutils-analysis/binutils-gdb/obj-asan/binutils/../../binutils/objdump.c:4006:6
    #13 0x7f922c820f44 in __libc_start_main
/build/eglibc-MjiXCM/eglibc-2.19/csu/libc-start.c:287
    #14 0x41b5f5 in _start
(/home/ubuntu/binutils-analysis/binutils-gdb/obj-asan/binutils/objdump+0x41b5f5)

SUMMARY: AddressSanitizer: heap-buffer-overflow
/home/ubuntu/binutils-analysis/binutils-gdb/obj-asan/bfd/../../bfd/reloc.c:885:11
in bfd_perform_relocations

VALGRIND says:
==153426== Invalid read of size 1
==153426==    at 0x4D1D15: bfd_perform_relocation (reloc.c:885)
==153426==    by 0x4D29AA: bfd_generic_get_relocated_section_contents
(reloc.c:8170)
==153426==    by 0x44FDCB: bfd_simple_get_relocated_section_contents
(simple.c:264)
==153426==    by 0x40AD53: load_specific_debug_section (objdump.c:2482)
==153426==    by 0x40AF58: dump_dwarf_section (objdump.c:2620)
==153426==    by 0x44F7FB: bfd_map_over_sections (section.c:1395)
==153426==    by 0x406E13: dump_dwarf (objdump.c:2689)
==153426==    by 0x40812D: dump_bfd (objdump.c:3527)
==153426==    by 0x4089BF: display_object_bfd (objdump.c:3594)
==153426==    by 0x4089BF: display_any_bfd (objdump.c:3683)
==153426==    by 0x40ABC3: display_file (objdump.c:3704)
==153426==    by 0x404CDD: main (objdump.c:4006)
==153426==  Address 0x541f18f is 1 bytes before a block of size 220 alloc'd
==153426==    at 0x4C2AB80: malloc (in
/usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==153426==    by 0x44C9FD: bfd_malloc (libbfd.c:184)
==153426==    by 0x44AD97: bfd_get_full_section_contents (compress.c:248)
==153426==    by 0x40AD15: load_specific_debug_section (objdump.c:2468)
==153426==    by 0x40AF58: dump_dwarf_section (objdump.c:2620)
==153426==    by 0x44F7FB: bfd_map_over_sections (section.c:1395)
==153426==    by 0x406E13: dump_dwarf (objdump.c:2689)
==153426==    by 0x40812D: dump_bfd (objdump.c:3527)
==153426==    by 0x4089BF: display_object_bfd (objdump.c:3594)
==153426==    by 0x4089BF: display_any_bfd (objdump.c:3683)
==153426==    by 0x40ABC3: display_file (objdump.c:3704)
==153426==    by 0x404CDD: main (objdump.c:4006)
==153426== 
==153426== Invalid write of size 1
==153426==    at 0x4D1D2F: bfd_perform_relocation (reloc.c:886)
==153426==    by 0x4D29AA: bfd_generic_get_relocated_section_contents
(reloc.c:8170)
==153426==    by 0x44FDCB: bfd_simple_get_relocated_section_contents
(simple.c:264)
==153426==    by 0x40AD53: load_specific_debug_section (objdump.c:2482)
==153426==    by 0x40AF58: dump_dwarf_section (objdump.c:2620)
==153426==    by 0x44F7FB: bfd_map_over_sections (section.c:1395)
==153426==    by 0x406E13: dump_dwarf (objdump.c:2689)
==153426==    by 0x40812D: dump_bfd (objdump.c:3527)
==153426==    by 0x4089BF: display_object_bfd (objdump.c:3594)
==153426==    by 0x4089BF: display_any_bfd (objdump.c:3683)
==153426==    by 0x40ABC3: display_file (objdump.c:3704)
==153426==    by 0x404CDD: main (objdump.c:4006)
==153426==  Address 0x541f18f is 1 bytes before a block of size 220 alloc'd
==153426==    at 0x4C2AB80: malloc (in
/usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==153426==    by 0x44C9FD: bfd_malloc (libbfd.c:184)
==153426==    by 0x44AD97: bfd_get_full_section_contents (compress.c:248)
==153426==    by 0x40AD15: load_specific_debug_section (objdump.c:2468)
==153426==    by 0x40AF58: dump_dwarf_section (objdump.c:2620)
==153426==    by 0x44F7FB: bfd_map_over_sections (section.c:1395)
==153426==    by 0x406E13: dump_dwarf (objdump.c:2689)
==153426==    by 0x40812D: dump_bfd (objdump.c:3527)
==153426==    by 0x4089BF: display_object_bfd (objdump.c:3594)
==153426==    by 0x4089BF: display_any_bfd (objdump.c:3683)
==153426==    by 0x40ABC3: display_file (objdump.c:3704)
==153426==    by 0x404CDD: main (objdump.c:4006)
==153426==

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