binutils 2.29.51.20170921 – ‘read_1_byte’ Heap Buffer Overflow

Exploit Database
111 阅读

作者： Agostino Sarubbo

日期： 2017-10-10
类别：
- dos
平台：
- linux
来源：https://www.exploit-db.com/exploits/42970/

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Source: https://blogs.gentoo.org/ago/2017/09/26/binutils-heap-based-buffer-overflow-in-read_1_byte-dwarf2-c/

Description:

binutils is a set of tools necessary to build programs.

The complete ASan output of the issue:

# nm -A -a -l -S -s --special-syms --synthetic --with-symbol-versions -D $FILE

==3235==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x613000000512 at pc 0x7f7c93ae3c88 bp 0x7ffe38d7a970 sp 0x7ffe38d7a968

READ of size 1 at 0x613000000512 thread T0

#0 0x7f7c93ae3c87 in read_1_byte /var/tmp/portage/sys-devel/binutils-9999/work/binutils/bfd/dwarf2.c:616:10

#1 0x7f7c93ae3c87 in decode_line_info /var/tmp/portage/sys-devel/binutils-9999/work/binutils/bfd/dwarf2.c:2311

#2 0x7f7c93aee92b in comp_unit_maybe_decode_line_info /var/tmp/portage/sys-devel/binutils-9999/work/binutils/bfd/dwarf2.c:3608:26

#3 0x7f7c93aee92b in comp_unit_find_line /var/tmp/portage/sys-devel/binutils-9999/work/binutils/bfd/dwarf2.c:3643

#4 0x7f7c93aeb94f in _bfd_dwarf2_find_nearest_line /var/tmp/portage/sys-devel/binutils-9999/work/binutils/bfd/dwarf2.c:4755:11

#5 0x7f7c93a2920b in _bfd_elf_find_line /var/tmp/portage/sys-devel/binutils-9999/work/binutils/bfd/elf.c:8694:10

#6 0x517c83 in print_symbol /var/tmp/portage/sys-devel/binutils-9999/work/binutils/binutils/nm.c:1003:9

#7 0x51542d in print_symbols /var/tmp/portage/sys-devel/binutils-9999/work/binutils/binutils/nm.c:1084:7

#8 0x51542d in display_rel_file /var/tmp/portage/sys-devel/binutils-9999/work/binutils/binutils/nm.c:1200

#9 0x510f56 in display_file /var/tmp/portage/sys-devel/binutils-9999/work/binutils/binutils/nm.c:1318:7

#10 0x50faae in main /var/tmp/portage/sys-devel/binutils-9999/work/binutils/binutils/nm.c:1792:12

#11 0x7f7c9296e680 in __libc_start_main /var/tmp/portage/sys-libs/glibc-2.23-r4/work/glibc-2.23/csu/../csu/libc-start.c:289

#12 0x41ac18 in _init (/usr/x86_64-pc-linux-gnu/binutils-bin/git/nm+0x41ac18)

0x613000000512 is located 0 bytes to the right of 338-byte region [0x6130000003c0,0x613000000512)

allocated by thread T0 here:

#0 0x4d8e08 in malloc /var/tmp/portage/sys-libs/compiler-rt-sanitizers-5.0.0/work/compiler-rt-5.0.0.src/lib/asan/asan_malloc_linux.cc:67

#1 0x7f7c9393a37c in bfd_malloc /var/tmp/portage/sys-devel/binutils-9999/work/binutils/bfd/libbfd.c:193:9

#2 0x7f7c9392fb2f in bfd_get_full_section_contents /var/tmp/portage/sys-devel/binutils-9999/work/binutils/bfd/compress.c:248:21

#3 0x7f7c939696d3 in bfd_simple_get_relocated_section_contents /var/tmp/portage/sys-devel/binutils-9999/work/binutils/bfd/simple.c:193:12

#4 0x7f7c93ade26e in read_section /var/tmp/portage/sys-devel/binutils-9999/work/binutils/bfd/dwarf2.c:556:8

#5 0x7f7c93adef3c in decode_line_info /var/tmp/portage/sys-devel/binutils-9999/work/binutils/bfd/dwarf2.c:2047:9

#6 0x7f7c93aee92b in comp_unit_maybe_decode_line_info /var/tmp/portage/sys-devel/binutils-9999/work/binutils/bfd/dwarf2.c:3608:26

#7 0x7f7c93aee92b in comp_unit_find_line /var/tmp/portage/sys-devel/binutils-9999/work/binutils/bfd/dwarf2.c:3643

#8 0x7f7c93aeb94f in _bfd_dwarf2_find_nearest_line /var/tmp/portage/sys-devel/binutils-9999/work/binutils/bfd/dwarf2.c:4755:11

#9 0x7f7c93a2920b in _bfd_elf_find_line /var/tmp/portage/sys-devel/binutils-9999/work/binutils/bfd/elf.c:8694:10

#10 0x517c83 in print_symbol /var/tmp/portage/sys-devel/binutils-9999/work/binutils/binutils/nm.c:1003:9

#11 0x51542d in print_symbols /var/tmp/portage/sys-devel/binutils-9999/work/binutils/binutils/nm.c:1084:7

#12 0x51542d in display_rel_file /var/tmp/portage/sys-devel/binutils-9999/work/binutils/binutils/nm.c:1200

#13 0x510f56 in display_file /var/tmp/portage/sys-devel/binutils-9999/work/binutils/binutils/nm.c:1318:7

#14 0x50faae in main /var/tmp/portage/sys-devel/binutils-9999/work/binutils/binutils/nm.c:1792:12

#15 0x7f7c9296e680 in __libc_start_main /var/tmp/portage/sys-libs/glibc-2.23-r4/work/glibc-2.23/csu/../csu/libc-start.c:289

SUMMARY: AddressSanitizer: heap-buffer-overflow /var/tmp/portage/sys-devel/binutils-9999/work/binutils/bfd/dwarf2.c:616:10 in read_1_byte

Shadow bytes around the buggy address:

0x0c267fff8050: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

0x0c267fff8060: 00 00 00 00 00 00 00 00 00 00 00 04 fa fa fa fa

0x0c267fff8070: fa fa fa fa fa fa fa fa 00 00 00 00 00 00 00 00

0x0c267fff8080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

0x0c267fff8090: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

=>0x0c267fff80a0: 00 00[02]fa fa fa fa fa fa fa fa fa fa fa fa fa

0x0c267fff80b0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa

0x0c267fff80c0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa

0x0c267fff80d0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa

0x0c267fff80e0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa

0x0c267fff80f0: 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

==3235==ABORTING

Affected version:

2.29.51.20170921 and maybe past releases

Fixed version:

N/A

Commit fix:

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=515f23e63c0074ab531bc954f84ca40c6281a724

Credit:

This bug was discovered by Agostino Sarubbo of Gentoo.

CVE:

CVE-2017-14939

Reproducer:

https://github.com/asarubbo/poc/blob/master/00370-binutils-heapoverflow-read_1_byte

https://gitlab.com/exploit-database/exploitdb-bin-sploits/-/raw/main/bin-sploits/42970.zip

Timeline:

2017-09-21: bug discovered and reported to upstream

2017-09-24: upstream released a patch

2017-09-26: blog post about the issue

2017-09-29: CVE assigned

Note:

This bug was found with American Fuzzy Lop.

This bug was identified with bare metal servers donated by Packet. This work is also supported by the Core Infrastructure Initiative.

Permalink:

<blockquote class="wp-embedded-content" data-secret="L5CjYVFHYN"><a href="https://blogs.gentoo.org/ago/2017/09/26/binutils-heap-based-buffer-overflow-in-read_1_byte-dwarf2-c/" target="_blank"rel="external nofollow" class="external" >binutils: heap-based buffer overflow in read_1_byte (dwarf2.c)</a></blockquote><iframe class="wp-embedded-content" sandbox="allow-scripts" security="restricted" style="position: absolute; visibility: hidden;" title="“binutils: heap-based buffer overflow in read_1_byte (dwarf2.c)” — agostino's blog" src="https://blogs.gentoo.org/ago/2017/09/26/binutils-heap-based-buffer-overflow-in-read_1_byte-dwarf2-c/embed/#?secret=h8rDFFsBK3#?secret=L5CjYVFHYN" data-secret="L5CjYVFHYN" frameborder="0" marginmarginscrolling="no"></iframe>

Proof of Concept:

https://gitlab.com/exploit-database/exploitdb-bin-sploits/-/raw/main/bin-sploits/42970.zip