https://sourceware.org/bugzilla/show_bug.cgi?id=26241
Bug ID: 26241
Summary: Heap overwrite in bits/string3
Product: binutils
Version: 2.36 (HEAD)
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: binutils
Assignee: unassigned at sourceware dot org
Reporter: featherrain26 at gmail dot com
Target Milestone: ---
Created attachment 12700
--> https://sourceware.org/bugzilla/attachment.cgi?id=12700&action=edit
POC input
Hi, there.
There is a heap overflow in the newest version of Binutils, libbfd.c
To reproduce,
run
nm-new -C -a -l --synthetic poc
Here is the trace reported by ASAN:
=================================================================
==8125==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x62700001bfc8
at pc 0x7f800e15dc4c bp 0x7fffc72c76e0 sp 0x7fffc72c6e88
WRITE of size 40 at 0x62700001bfc8 thread T0
#0 0x7f800e15dc4b in __asan_memset
(/usr/lib/x86_64-linux-gnu/libasan.so.2+0x8cc4b)
#1 0x7c7375 in memset /usr/include/x86_64-linux-gnu/bits/string3.h:90
#2 0x7c7375 in _bfd_pex64i_swap_aux_in
/mnt/data/playground/binutils-gdb/build/bfd/peXXigen.c:299
#3 0x7857f2 in coff_get_normalized_symtab ../../bfd/coffgen.c:1830
#4 0x7a4e04 in coff_slurp_symbol_table ../../bfd/coffcode.h:4494
#5 0x770538 in coff_get_symtab_upper_bound ../../bfd/coffgen.c:411
#6 0x47a425 in _bfd_generic_read_minisymbols ../../bfd/syms.c:802
#7 0x40e9fd in display_rel_file ../../binutils/nm.c:1126
#8 0x4123cb in display_file ../../binutils/nm.c:1393
#9 0x407e93 in main ../../binutils/nm.c:1874
#10 0x7f800db2382f in __libc_start_main
(/lib/x86_64-linux-gnu/libc.so.6+0x2082f)
#11 0x409e98 in _start
(/mnt/data/playground/binutils-gdb/build/binutils/nm-new+0x409e98)
0x62700001bfc8 is located 8 bytes to the right of 14016-byte region
[0x627000018900,0x62700001bfc0)
allocated by thread T0 here:
#0 0x7f800e169662 in malloc
(/usr/lib/x86_64-linux-gnu/libasan.so.2+0x98662)
#1 0x9471cc in _objalloc_alloc ../../libiberty/objalloc.c:143
SUMMARY: AddressSanitizer: heap-buffer-overflow ??:0 __asan_memset
Shadow bytes around the buggy address:
0x0c4e7fffb7a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c4e7fffb7b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c4e7fffb7c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c4e7fffb7d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c4e7fffb7e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
=>0x0c4e7fffb7f0: 00 00 00 00 00 00 00 00 fa[fa]fa fa fa fa fa fa
0x0c4e7fffb800: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c4e7fffb810: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c4e7fffb820: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c4e7fffb830: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c4e7fffb840: 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
Heap right redzone: fb
Freed heap region: fd
Stack left redzone: f1
Stack mid redzone: f2
Stack right redzone: f3
Stack partial redzone: f4
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
==8125==ABORTING
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