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tiffcrop: heap-buffer-overflow in /tiff-4.5.0/tools/tiffcrop.c:3760:24 in extractContigSamplesShifted8bits

Summary

There is a buffer overflow in /tiff-4.5.0/tools/tiffcrop.c:3760:24 in extractContigSamplesShifted8bits. Remote attackers could leverage this vulnerability to cause a denial-of-service via a crafted tiff file.

Version

./tiffcrop -v
Library Release: LIBTIFF, Version 4.5.0
Copyright (c) 1988-1996 Sam Leffler
Copyright (c) 1991-1996 Silicon Graphics, Inc.
Tiffcp code: Copyright (c) 1988-1997 Sam Leffler
           : Copyright (c) 1991-1997 Silicon Graphics, Inc
Tiffcrop additions: Copyright (c) 2007-2010 Richard Nolde

Platform

uname -a 
Linux user-GE40-2PC-Dragon-Eyes 5.19.0-40-generic #41~22.04.1-Ubuntu SMP PREEMPT_DYNAMIC Fri Mar 31 16:00:14 UTC 2 x86_64 x86_64 x86_64 GNU/Linux

ASAN_heap-buffer-overflow

==1115154==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x61d000001311 at pc 0x55ca43a22107 bp 0x7ffee1c7fe40 sp 0x7ffee1c7fe38
READ of size 1 at 0x61d000001311 thread T0
    #0 0x55ca43a22106 in extractContigSamplesShifted8bits /home/user/fuzzing_tiff/tiff-4.5.0/tools/tiffcrop.c:3760:24
    #1 0x55ca439ede40 in extractCompositeRegions /home/user/fuzzing_tiff/tiff-4.5.0/tools/tiffcrop.c:7452:37
    #2 0x55ca439ede40 in processCropSelections /home/user/fuzzing_tiff/tiff-4.5.0/tools/tiffcrop.c:8504:13
    #3 0x55ca439ede40 in main /home/user/fuzzing_tiff/tiff-4.5.0/tools/tiffcrop.c:2807:21
    #4 0x7fa174629d8f in __libc_start_call_main csu/../sysdeps/nptl/libc_start_call_main.h:58:16
    #5 0x7fa174629e3f in __libc_start_main csu/../csu/libc-start.c:392:3
    #6 0x55ca4391b284 in _start (/home/user/fuzzing_tiff/install/bin/tiffcrop+0xd7284) (BuildId: b74ccf7dfc4e9a79)

0x61d000001311 is located 45 bytes to the right of 2148-byte region [0x61d000000a80,0x61d0000012e4)
allocated by thread T0 here:
    #0 0x55ca4399e0ce in malloc (/home/user/fuzzing_tiff/install/bin/tiffcrop+0x15a0ce) (BuildId: b74ccf7dfc4e9a79)
    #1 0x55ca439ed634 in _TIFFmalloc /home/user/fuzzing_tiff/tiff-4.5.0/libtiff/tif_unix.c:326:13
    #2 0x55ca439ed634 in processCropSelections /home/user/fuzzing_tiff/tiff-4.5.0/tools/tiffcrop.c
    #3 0x55ca439ed634 in main /home/user/fuzzing_tiff/tiff-4.5.0/tools/tiffcrop.c:2807:21
    #4 0x7fa174629d8f in __libc_start_call_main csu/../sysdeps/nptl/libc_start_call_main.h:58:16

SUMMARY: AddressSanitizer: heap-buffer-overflow /home/user/fuzzing_tiff/tiff-4.5.0/tools/tiffcrop.c:3760:24 in extractContigSamplesShifted8bits
Shadow bytes around the buggy address:
  0x0c3a7fff8210: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c3a7fff8220: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c3a7fff8230: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c3a7fff8240: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c3a7fff8250: 00 00 00 00 00 00 00 00 00 00 00 00 04 fa fa fa
=>0x0c3a7fff8260: fa fa[fa]fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c3a7fff8270: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c3a7fff8280: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c3a7fff8290: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c3a7fff82a0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c3a7fff82b0: 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
==1115154==ABORTING

Steps to reproduce

./tiffcrop -E right  -z 1,1,2048,2048:1,2049,2048,4097 -i -s $poc_file /tmp/foo

POC File

poc_of_3760

Credit

Gandalf4a@QAXsrc