112 lines
No EOL
6.4 KiB
Text
112 lines
No EOL
6.4 KiB
Text
Source: https://blogs.gentoo.org/ago/2017/09/26/binutils-heap-based-buffer-overflow-in-read_1_byte-dwarf2-c/
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Description:
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binutils is a set of tools necessary to build programs.
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The complete ASan output of the issue:
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# nm -A -a -l -S -s --special-syms --synthetic --with-symbol-versions -D $FILE
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==3235==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x613000000512 at pc 0x7f7c93ae3c88 bp 0x7ffe38d7a970 sp 0x7ffe38d7a968
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READ of size 1 at 0x613000000512 thread T0
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#0 0x7f7c93ae3c87 in read_1_byte /var/tmp/portage/sys-devel/binutils-9999/work/binutils/bfd/dwarf2.c:616:10
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#1 0x7f7c93ae3c87 in decode_line_info /var/tmp/portage/sys-devel/binutils-9999/work/binutils/bfd/dwarf2.c:2311
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#2 0x7f7c93aee92b in comp_unit_maybe_decode_line_info /var/tmp/portage/sys-devel/binutils-9999/work/binutils/bfd/dwarf2.c:3608:26
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#3 0x7f7c93aee92b in comp_unit_find_line /var/tmp/portage/sys-devel/binutils-9999/work/binutils/bfd/dwarf2.c:3643
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#4 0x7f7c93aeb94f in _bfd_dwarf2_find_nearest_line /var/tmp/portage/sys-devel/binutils-9999/work/binutils/bfd/dwarf2.c:4755:11
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#5 0x7f7c93a2920b in _bfd_elf_find_line /var/tmp/portage/sys-devel/binutils-9999/work/binutils/bfd/elf.c:8694:10
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#6 0x517c83 in print_symbol /var/tmp/portage/sys-devel/binutils-9999/work/binutils/binutils/nm.c:1003:9
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#7 0x51542d in print_symbols /var/tmp/portage/sys-devel/binutils-9999/work/binutils/binutils/nm.c:1084:7
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#8 0x51542d in display_rel_file /var/tmp/portage/sys-devel/binutils-9999/work/binutils/binutils/nm.c:1200
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#9 0x510f56 in display_file /var/tmp/portage/sys-devel/binutils-9999/work/binutils/binutils/nm.c:1318:7
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#10 0x50faae in main /var/tmp/portage/sys-devel/binutils-9999/work/binutils/binutils/nm.c:1792:12
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#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
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#12 0x41ac18 in _init (/usr/x86_64-pc-linux-gnu/binutils-bin/git/nm+0x41ac18)
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0x613000000512 is located 0 bytes to the right of 338-byte region [0x6130000003c0,0x613000000512)
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allocated by thread T0 here:
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#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
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#1 0x7f7c9393a37c in bfd_malloc /var/tmp/portage/sys-devel/binutils-9999/work/binutils/bfd/libbfd.c:193:9
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#2 0x7f7c9392fb2f in bfd_get_full_section_contents /var/tmp/portage/sys-devel/binutils-9999/work/binutils/bfd/compress.c:248:21
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#3 0x7f7c939696d3 in bfd_simple_get_relocated_section_contents /var/tmp/portage/sys-devel/binutils-9999/work/binutils/bfd/simple.c:193:12
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#4 0x7f7c93ade26e in read_section /var/tmp/portage/sys-devel/binutils-9999/work/binutils/bfd/dwarf2.c:556:8
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#5 0x7f7c93adef3c in decode_line_info /var/tmp/portage/sys-devel/binutils-9999/work/binutils/bfd/dwarf2.c:2047:9
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#6 0x7f7c93aee92b in comp_unit_maybe_decode_line_info /var/tmp/portage/sys-devel/binutils-9999/work/binutils/bfd/dwarf2.c:3608:26
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#7 0x7f7c93aee92b in comp_unit_find_line /var/tmp/portage/sys-devel/binutils-9999/work/binutils/bfd/dwarf2.c:3643
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#8 0x7f7c93aeb94f in _bfd_dwarf2_find_nearest_line /var/tmp/portage/sys-devel/binutils-9999/work/binutils/bfd/dwarf2.c:4755:11
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#9 0x7f7c93a2920b in _bfd_elf_find_line /var/tmp/portage/sys-devel/binutils-9999/work/binutils/bfd/elf.c:8694:10
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#10 0x517c83 in print_symbol /var/tmp/portage/sys-devel/binutils-9999/work/binutils/binutils/nm.c:1003:9
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#11 0x51542d in print_symbols /var/tmp/portage/sys-devel/binutils-9999/work/binutils/binutils/nm.c:1084:7
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#12 0x51542d in display_rel_file /var/tmp/portage/sys-devel/binutils-9999/work/binutils/binutils/nm.c:1200
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#13 0x510f56 in display_file /var/tmp/portage/sys-devel/binutils-9999/work/binutils/binutils/nm.c:1318:7
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#14 0x50faae in main /var/tmp/portage/sys-devel/binutils-9999/work/binutils/binutils/nm.c:1792:12
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#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
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SUMMARY: AddressSanitizer: heap-buffer-overflow /var/tmp/portage/sys-devel/binutils-9999/work/binutils/bfd/dwarf2.c:616:10 in read_1_byte
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Shadow bytes around the buggy address:
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0x0c267fff8050: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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0x0c267fff8060: 00 00 00 00 00 00 00 00 00 00 00 04 fa fa fa fa
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0x0c267fff8070: fa fa fa fa fa fa fa fa 00 00 00 00 00 00 00 00
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0x0c267fff8080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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0x0c267fff8090: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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=>0x0c267fff80a0: 00 00[02]fa fa fa fa fa fa fa fa fa fa fa fa fa
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0x0c267fff80b0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
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0x0c267fff80c0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
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0x0c267fff80d0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
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0x0c267fff80e0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
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0x0c267fff80f0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
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Shadow byte legend (one shadow byte represents 8 application bytes):
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Addressable: 00
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Partially addressable: 01 02 03 04 05 06 07
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Heap left redzone: fa
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Freed heap region: fd
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Stack left redzone: f1
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Stack mid redzone: f2
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Stack right redzone: f3
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Stack after return: f5
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Stack use after scope: f8
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Global redzone: f9
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Global init order: f6
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Poisoned by user: f7
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Container overflow: fc
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Array cookie: ac
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Intra object redzone: bb
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ASan internal: fe
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Left alloca redzone: ca
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Right alloca redzone: cb
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==3235==ABORTING
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Affected version:
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2.29.51.20170921 and maybe past releases
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Fixed version:
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N/A
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Commit fix:
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https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=515f23e63c0074ab531bc954f84ca40c6281a724
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Credit:
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This bug was discovered by Agostino Sarubbo of Gentoo.
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CVE:
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CVE-2017-14939
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Reproducer:
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https://github.com/asarubbo/poc/blob/master/00370-binutils-heapoverflow-read_1_byte
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https://gitlab.com/exploit-database/exploitdb-bin-sploits/-/raw/main/bin-sploits/42970.zip
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Timeline:
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2017-09-21: bug discovered and reported to upstream
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2017-09-24: upstream released a patch
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2017-09-26: blog post about the issue
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2017-09-29: CVE assigned
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Note:
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This bug was found with American Fuzzy Lop.
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This bug was identified with bare metal servers donated by Packet. This work is also supported by the Core Infrastructure Initiative.
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Permalink:
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https://blogs.gentoo.org/ago/2017/09/26/binutils-heap-based-buffer-overflow-in-read_1_byte-dwarf2-c/
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Proof of Concept:
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https://gitlab.com/exploit-database/exploitdb-bin-sploits/-/raw/main/bin-sploits/42970.zip |