[<prev] [next>] [day] [month] [year] [list]
Date: Mon, 10 Apr 2017 07:43:59 +0000
From: "Agostino Sarubbo" <ago@...too.org>
To: "oss-security@...ts.openwall.com" <oss-security@...ts.openwall.com>
Subject: elfutils: memory allocation failure in xcalloc (xmalloc.c)
Description:
elfutils is a set of libraries/utilities to handle ELF objects (drop in replacement for libelf).
A fuzz on eu-elflint showed a memory allocation failure.
The interesting ASan output:
# eu-elflint -d $FILE
==5053==AddressSanitizer CHECK failed: /tmp/portage/sys-devel/gcc-6.3.0/work/gcc-6.3.0/libsanitizer/sanitizer_common/sanitizer_common.cc:180 "((0 && "unable to mmap")) != (0)" (0x0, 0x0)
#0 0x7faa2335941d (/usr/lib/gcc/x86_64-pc-linux-gnu/6.3.0/libasan.so.3+0xcb41d)
#1 0x7faa2335f063 in __sanitizer::CheckFailed(char const*, int, char const*, unsigned long long, unsigned long long) (/usr/lib/gcc/x86_64-pc-linux-gnu/6.3.0/libasan.so.3+0xd1063)
#2 0x7faa2335f24d (/usr/lib/gcc/x86_64-pc-linux-gnu/6.3.0/libasan.so.3+0xd124d)
#3 0x7faa23368c52 (/usr/lib/gcc/x86_64-pc-linux-gnu/6.3.0/libasan.so.3+0xdac52)
#4 0x7faa232ba0b9 (/usr/lib/gcc/x86_64-pc-linux-gnu/6.3.0/libasan.so.3+0x2c0b9)
#5 0x7faa232b249b (/usr/lib/gcc/x86_64-pc-linux-gnu/6.3.0/libasan.so.3+0x2449b)
#6 0x7faa2335040a in calloc (/usr/lib/gcc/x86_64-pc-linux-gnu/6.3.0/libasan.so.3+0xc240a)
#7 0x431b8d in xcalloc /tmp/portage/dev-libs/elfutils-0.168/work/elfutils-0.168/lib/xmalloc.c:64
#8 0x41f0bb in check_sections /tmp/portage/dev-libs/elfutils-0.168/work/elfutils-0.168/src/elflint.c:3680
#9 0x42961f in process_elf_file /tmp/portage/dev-libs/elfutils-0.168/work/elfutils-0.168/src/elflint.c:4697
#10 0x42961f in process_file /tmp/portage/dev-libs/elfutils-0.168/work/elfutils-0.168/src/elflint.c:242
#11 0x402d33 in main /tmp/portage/dev-libs/elfutils-0.168/work/elfutils-0.168/src/elflint.c:175
#12 0x7faa21c6378f in __libc_start_main (/lib64/libc.so.6+0x2078f)
#13 0x403498 in _start (/usr/bin/eu-elflint+0x403498)
Affected version:
0.168
Fixed version:
0.169 (not released atm)
Commit fix:
https://sourceware.org/ml/elfutils-devel/2017-q1/msg00133.html
Credit:
This bug was discovered by Agostino Sarubbo of Gentoo.
CVE:
CVE-2017-7613
Reproducer:
https://github.com/asarubbo/poc/blob/master/00236-elfutils-memallocfailure
Timeline:
2017-03-27: bug discovered and reported to upstream
2017-04-04: blog post about the issue
2017-04-09: CVE assigned
Note:
This bug was found with American Fuzzy Lop.
Permalink:
https://blogs.gentoo.org/ago/2017/04/03/elfutils-memory-allocation-failure-in-xcalloc-xmalloc-c/
--
Agostino Sarubbo
Gentoo Linux Developer
Powered by blists - more mailing lists
Please check out the
Open Source Software Security Wiki, which is counterpart to this
mailing list.
Confused about mailing lists and their use?
Read about mailing lists on Wikipedia
and check out these
guidelines on proper formatting of your messages.
