https://sourceware.org/bugzilla/show_bug.cgi?id=32399
Bug ID: 32399
Summary: A heap buffer overflow is found in display_bfd of
binutils 2.44 (HEAD) in size.c:354
Product: binutils
Version: 2.44 (HEAD)
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: binutils
Assignee: unassigned at sourceware dot org
Reporter: xiezhiheng at huawei dot com
Target Milestone: ---
Created attachment 15808
--> https://sourceware.org/bugzilla/attachment.cgi?id=15808&action=edit
size poc file
Hi,
There is a heap buffer overflow bug in binutils 2.44 (HEAD).
To reproduce this bug, use:
1. compile binutils with gcc 7.3.0 and address sanitizer:
```
../configure --disable-gdb --disable-gdbserver --disable-gdbsupport
--disable-libdecnumber --disable-readline --disable-sim --disable-libbacktrace
--disable-gas --disable-ld --disable-werror --enable-targets=all
CPPFLAGS="-DDEBUG" CFLAGS="-g -O0 -fsanitize=address"
make
```
2. use `size` to process the `poc` file (see attachment):
```
./size ./poc
```
text data bss dec hex filename
=================================================================
==45528==ERROR: AddressSanitizer: heap-buffer-overflow on address
0xffff9c2006f4 at pc 0xffff9fb15c1c bp 0xfffff0f06080 sp 0xfffff0f06130
READ of size 5 at 0xffff9c2006f4 thread T0
#0 0xffff9fb15c1b (/usr/lib64/libasan.so.4+0x44c1b)
#1 0xffff9fb15ef7 in __interceptor_vprintf
(/usr/lib64/libasan.so.4+0x44ef7)
#2 0xffff9fb16007 in printf (/usr/lib64/libasan.so.4+0x45007)
#3 0x40474b in display_bfd ../../binutils/size.c:354
#4 0x40498f in display_file ../../binutils/size.c:429
#5 0x404037 in main ../../binutils/size.c:259
#6 0xffff9f93abeb in __libc_start_main (/usr/lib64/libc.so.6+0x20beb)
#7 0x4033a3 (size+0x4033a3)
0xffff9c2006f4 is located 0 bytes to the right of 4-byte region
[0xffff9c2006f0,0xffff9c2006f4)
allocated by thread T0 here:
#0 0xffff9fba41db in __interceptor_malloc (/usr/lib64/libasan.so.4+0xd31db)
#1 0x42a483 in bfd_malloc ../../bfd/libbfd.c:291
#2 0x10c256b in bfd_mach_o_core_fetch_environment ../../bfd/mach-o.c:5990
#3 0x10c2867 in bfd_mach_o_core_file_failing_command
../../bfd/mach-o.c:6021
#4 0x422b87 in bfd_core_file_failing_command ../../bfd/corefile.c:58
#5 0x40472b in display_bfd ../../binutils/size.c:352
#6 0x40498f in display_file ../../binutils/size.c:429
#7 0x404037 in main ../../binutils/size.c:259
#8 0xffff9f93abeb in __libc_start_main (/usr/lib64/libc.so.6+0x20beb)
#9 0x4033a3 (size+0x4033a3)
SUMMARY: AddressSanitizer: heap-buffer-overflow
(/usr/lib64/libasan.so.4+0x44c1b)
Shadow bytes around the buggy address:
0x200ff3840080: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x200ff3840090: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x200ff38400a0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x200ff38400b0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x200ff38400c0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
=>0x200ff38400d0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa[04]fa
0x200ff38400e0: fa fa fd fd fa fa 00 01 fa fa 00 04 fa fa 00 04
0x200ff38400f0: fa fa 00 04 fa fa fd fa fa fa fa fa fa fa fa fa
0x200ff3840100: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x200ff3840110: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x200ff3840120: 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
==45528==ABORTING
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