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Message-ID: <486401.030651422-sendEmail@localhost>
Date: Wed, 4 Oct 2017 15:45:57 +0000
From: "Agostino Sarubbo" <ago@...too.org>
To: "oss-security@...ts.openwall.com" <oss-security@...ts.openwall.com>
Subject: binutils: infinite loop in find_abstract_instance_name (dwarf2.c)
Description:
binutils is a set of tools necessary to build programs.
The relevant ASan output of the issue:
# nm -A -a -l -S -s --special-syms --synthetic --with-symbol-versions -D $FILE
==22616==ERROR: AddressSanitizer: stack-overflow on address 0x7ffc2948efe8 (pc 0x0000004248eb bp 0x7ffc2948f8e0 sp 0x7ffc2948efe0 T0)
#0 0x4248ea in __asan::Allocator::Allocate(unsigned long, unsigned long, __sanitizer::BufferedStackTrace*, __asan::AllocType, bool) /var/tmp/portage/sys-libs/compiler-rt-sanitizers-5.0.0/work/compiler-rt-5.0.0.src/lib/asan/asan_allocator.cc:381
#1 0x41f8f3 in __asan::asan_malloc(unsigned long, __sanitizer::BufferedStackTrace*) /var/tmp/portage/sys-libs/compiler-rt-sanitizers-5.0.0/work/compiler-rt-5.0.0.src/lib/asan/asan_allocator.cc:814
#2 0x4d8de4 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:68
#3 0x7ff17b5b237c in bfd_malloc /var/tmp/portage/sys-devel/binutils-9999/work/binutils/bfd/libbfd.c:193:9
#4 0x7ff17b5a7b2f in bfd_get_full_section_contents /var/tmp/portage/sys-devel/binutils-9999/work/binutils/bfd/compress.c:248:21
#5 0x7ff17b5e16d3 in bfd_simple_get_relocated_section_contents /var/tmp/portage/sys-devel/binutils-9999/work/binutils/bfd/simple.c:193:12
#6 0x7ff17b75626e in read_section /var/tmp/portage/sys-devel/binutils-9999/work/binutils/bfd/dwarf2.c:556:8
#7 0x7ff17b772053 in read_indirect_string /var/tmp/portage/sys-devel/binutils-9999/work/binutils/bfd/dwarf2.c:730:9
#8 0x7ff17b772053 in read_attribute_value /var/tmp/portage/sys-devel/binutils-9999/work/binutils/bfd/dwarf2.c:1189
#9 0x7ff17b76ebf4 in read_attribute /var/tmp/portage/sys-devel/binutils-9999/work/binutils/bfd/dwarf2.c:1306:14
#10 0x7ff17b76ebf4 in find_abstract_instance_name /var/tmp/portage/sys-devel/binutils-9999/work/binutils/bfd/dwarf2.c:2913
#11 0x7ff17b76ec98 in find_abstract_instance_name /var/tmp/portage/sys-devel/binutils-9999/work/binutils/bfd/dwarf2.c:2930:12
#12 0x7ff17b76ec98 in find_abstract_instance_name /var/tmp/portage/sys-devel/binutils-9999/work/binutils/bfd/dwarf2.c:2930:12
[..cut..]
#252 0x7ff17b76ec98 in find_abstract_instance_name /var/tmp/portage/sys-devel/binutils-9999/work/binutils/bfd/dwarf2.c:2930:12
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=52a93b95ec0771c97e26f0bb28630a271a667bd2
Credit:
This bug was discovered by Agostino Sarubbo of Gentoo.
CVE:
CVE-2017-15024
Reproducer:
https://github.com/asarubbo/poc/blob/master/00371-binutils-infiniteloop-find_abstract_instance_name
Timeline:
2017-09-22: bug discovered and reported to upstream
2017-09-24: upstream released a patch
2017-10-03: blog post about the issue
2017-10-04: 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:
https://blogs.gentoo.org/ago/2017/10/03/binutils-infinite-loop-in-find_abstract_instance_name-dwarf2-c/
--
Agostino Sarubbo
Gentoo Linux Developer
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