heap-buffer-overflow in tiffcrop
# Summary
Hello,I use fuzzer to test tiffcrop and fund heap-buffer-overflow,and the issue is different from issue #269. Because I run #269's poc and didn't trigger the crash.The following is the details.
# Version
latest version
# Steps to reproduce
```
CFLAGS="-fsanitize=address"
CXXFLAGS="-fsanitize=address"
CC=clang
CXX=clang++
./autogen.sh
./configure
./make
```
# Platform
Ubuntu_18.04(docker)
clang/clang++ 12.0.1
# Bug
```
root@c511e4bf49bc:/tiffcrop# ./tiffcrop.prefuzz id\:000000\,sig\:06\,src\:000472\,op\:arith8\,pos\:86\,val\:-7\,135076762 dist2.tiff
TIFFReadDirectoryCheckOrder: Warning, Invalid TIFF directory; tags are not sorted in ascending order.
TIFFFetchNormalTag: Warning, ASCII value for tag "InkNames" does not end in null byte. Forcing it to be null.
=================================================================
==1038141==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x6020000000b1 at pc 0x000000886974 bp 0x7ffc233257d0 sp 0x7ffc23324f80
READ of size 1 at 0x6020000000b1 thread T0
#0 0x886973 in __interceptor_strlen.part.36 /llvm/llvm-project/compiler-rt/lib/asan/../sanitizer_common/sanitizer_common_interceptors.inc:372
#1 0x451896 in writeCroppedImage (/tiffcrop/tiffcrop.prefuzz+0x451896)
#2 0x41e411 in main (/tiffcrop/tiffcrop.prefuzz+0x41e411)
#3 0x7fc80f6ddc86 in __libc_start_main /build/glibc-CVJwZb/glibc-2.27/csu/../csu/libc-start.c:310
#4 0x407ad9 in _start (/tiffcrop/tiffcrop.prefuzz+0x407ad9)
0x6020000000b1 is located 0 bytes to the right of 1-byte region [0x6020000000b0,0x6020000000b1)
allocated by thread T0 here:
#0 0x8fb3a0 in malloc /llvm/llvm-project/compiler-rt/lib/asan/asan_malloc_linux.cpp:145
#1 0x67d413 in _TIFFmalloc (/tiffcrop/tiffcrop.prefuzz+0x67d413)
#2 0x4c4299 in setByteArray (/tiffcrop/tiffcrop.prefuzz+0x4c4299)
#3 0x522bd8 in _TIFFsetNString (/tiffcrop/tiffcrop.prefuzz+0x522bd8)
#4 0x4e6bb6 in _TIFFVSetField (/tiffcrop/tiffcrop.prefuzz+0x4e6bb6)
#5 0x4c4c1d in TIFFVSetField (/tiffcrop/tiffcrop.prefuzz+0x4c4c1d)
#6 0x4c49b6 in TIFFSetField (/tiffcrop/tiffcrop.prefuzz+0x4c49b6)
#7 0x564952 in TIFFFetchNormalTag (/tiffcrop/tiffcrop.prefuzz+0x564952)
#8 0x53b5e4 in TIFFReadDirectory (/tiffcrop/tiffcrop.prefuzz+0x53b5e4)
#9 0x638ccb in TIFFClientOpen (/tiffcrop/tiffcrop.prefuzz+0x638ccb)
#10 0x679c1b in TIFFFdOpen (/tiffcrop/tiffcrop.prefuzz+0x679c1b)
#11 0x67d291 in TIFFOpen (/tiffcrop/tiffcrop.prefuzz+0x67d291)
#12 0x419d85 in main (/tiffcrop/tiffcrop.prefuzz+0x419d85)
#13 0x7fc80f6ddc86 in __libc_start_main /build/glibc-CVJwZb/glibc-2.27/csu/../csu/libc-start.c:310
SUMMARY: AddressSanitizer: heap-buffer-overflow /llvm/llvm-project/compiler-rt/lib/asan/../sanitizer_common/sanitizer_common_interceptors.inc:372 in __interceptor_strlen.part.36
Shadow bytes around the buggy address:
0x0c047fff7fc0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c047fff7fd0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c047fff7fe0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c047fff7ff0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c047fff8000: fa fa 00 00 fa fa fd fa fa fa 02 fa fa fa fd fa
=>0x0c047fff8010: fa fa fd fa fa fa[01]fa fa fa fd fd fa fa 00 04
0x0c047fff8020: fa fa 04 fa fa fa 00 fa fa fa 00 fa fa fa 00 fa
0x0c047fff8030: fa fa fd fd fa fa 00 04 fa fa fd fd fa fa fd fa
0x0c047fff8040: fa fa 00 fa fa fa 04 fa fa fa 04 fa fa fa fd fa
0x0c047fff8050: fa fa 00 fa fa fa fd fa fa fa 00 fa fa fa 04 fa
0x0c047fff8060: fa fa 02 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[id_000000_sig_06_src_000472_op_arith8_pos_86_val_-7_135076762](/uploads/6d485afc5c383af6b1c0c0491fdc259f/id_000000_sig_06_src_000472_op_arith8_pos_86_val_-7_135076762)
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
Shadow gap: cc
==1038141==ABORTING
```
# POC
[poc_tiffcrop.zip](/uploads/4c5dcc7b84bd47673ae089f268384bf3/poc_tiffcrop.zip)
# Credit
Yuhang Huang (NCNIPC of China)
Han Zheng (NCNIPC of China, Hexhive)
Thansk for your time!
issue
GitLab AI Context
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