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 ==40547==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x61a000000574 at pc 0x0000004c1ca8 bp 0x7ffc34f58d10 sp 0x7ffc34f584c0 WRITE of size 6 at 0x61a000000574 thread T0 #0 0x4c1ca7 in __asan_memcpy /var/tmp/portage/sys-libs/compiler-rt-sanitizers-5.0.0/work/compiler-rt-5.0.0.src/lib/asan/asan_interceptors.cc:466 #1 0x7f6df2a247e5 in _bfd_x86_elf_get_synthetic_symtab /var/tmp/portage/sys-devel/binutils-9999/work/binutils/bfd/elfxx-x86.c:1946:3 #2 0x7f6df29f7b7a in elf_x86_64_get_synthetic_symtab /var/tmp/portage/sys-devel/binutils-9999/work/binutils/bfd/elf64-x86-64.c:4963:10 #3 0x513df5 in display_rel_file /var/tmp/portage/sys-devel/binutils-9999/work/binutils/binutils/nm.c:1155:21 #4 0x510f56 in display_file /var/tmp/portage/sys-devel/binutils-9999/work/binutils/binutils/nm.c:1318:7 #5 0x50faae in main /var/tmp/portage/sys-devel/binutils-9999/work/binutils/binutils/nm.c:1792:12 #6 0x7f6df19d1680 in __libc_start_main /var/tmp/portage/sys-libs/glibc-2.23-r4/work/glibc-2.23/csu/../csu/libc-start.c:289 #7 0x41ac18 in _init (/usr/x86_64-pc-linux-gnu/binutils-bin/git/nm+0x41ac18) 0x61a000000574 is located 0 bytes to the right of 1268-byte region [0x61a000000080,0x61a000000574) 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 0x7f6df299dd5c in bfd_malloc /var/tmp/portage/sys-devel/binutils-9999/work/binutils/bfd/libbfd.c:193:9 #2 0x7f6df299dd5c in bfd_zmalloc /var/tmp/portage/sys-devel/binutils-9999/work/binutils/bfd/libbfd.c:278 #3 0x7f6df2a23e29 in _bfd_x86_elf_get_synthetic_symtab /var/tmp/portage/sys-devel/binutils-9999/work/binutils/bfd/elfxx-x86.c:1829:26 #4 0x7f6df29f7b7a in elf_x86_64_get_synthetic_symtab /var/tmp/portage/sys-devel/binutils-9999/work/binutils/bfd/elf64-x86-64.c:4963:10 #5 0x513df5 in display_rel_file /var/tmp/portage/sys-devel/binutils-9999/work/binutils/binutils/nm.c:1155:21 #6 0x510f56 in display_file /var/tmp/portage/sys-devel/binutils-9999/work/binutils/binutils/nm.c:1318:7 #7 0x50faae in main /var/tmp/portage/sys-devel/binutils-9999/work/binutils/binutils/nm.c:1792:12 #8 0x7f6df19d1680 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-libs/compiler-rt-sanitizers-5.0.0/work/compiler-rt-5.0.0.src/lib/asan/asan_interceptors.cc:466 in __asan_memcpy Shadow bytes around the buggy address: 0x0c347fff8050: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0c347fff8060: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0c347fff8070: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0c347fff8080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0c347fff8090: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 =>0x0c347fff80a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00[04]fa 0x0c347fff80b0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c347fff80c0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c347fff80d0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c347fff80e0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c347fff80f0: 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 ==40547==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=61e3bf5f83f7e505b6bc51ef65426e5b31e6e360
https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=56933f9e3e90eebf1018ed7417d6c1184b91db6b
Credit:
This bug was discovered by Agostino Sarubbo of Gentoo.
CVE:
CVE-2017-14729
Reproducer:
https://github.com/asarubbo/poc/blob/master/00367-binutils-heapoverflow-_bfd_x86_elf_get_synthetic_symtab
Timeline:
2017-09-21: bug discovered and reported to upstream
2017-09-22: upstream released a patch
2017-09-25: blog post about the issue
2017-09-25: 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:
binutils: heap-based buffer overflow in _bfd_x86_elf_get_synthetic_symtab (elfxx-x86.c)
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