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  • libtiff
  • libtiff
  • Issues
  • #380

/tools/tiffcrop.c:6866 - Heap buffer overflow in extractImageSection

Summary - (Summarize the bug encountered concisely)

There is a Heap buffer overflow in /tools/tiffcrop.c:6866 in extractImageSection function.

Version

root@ubuntu:/home/tlibtiff/tools# ./tiffcrop -v
Library Release: LIBTIFF, Version 4.3.0
Copyright (c) 1988-1996 Sam Leffler
Copyright (c) 1991-1996 Silicon Graphics, Inc.
Tiffcrop version: 2.4, last updated: 12-13-2010
Tiffcp code: Copyright (c) 1988-1997 Sam Leffler
           : Copyright (c) 1991-1997 Silicon Graphics, Inc
Tiffcrop additions: Copyright (c) 2007-2010 Richard Nolde

Steps to reproduce - (How one can reproduce the issue - this is very important)

Clone the latest source from the gitlab repository - git clone https://gitlab.com/libtiff/libtiff.git
cd libtiff

compile the source using the following command :  

CC=gcc CXX=g++ CFLAGS="-ggdb -fsanitize=address,undefined -fno-sanitize-recover=all" CXXFLAGS="-ggdb -fsanitize=address,undefined -fno-sanitize-recover=all" LDFLAGS="-fsanitize=address,undefined -fno-sanitize-recover=all -lm" ./configure --disable-shared

Reproduce the crash with the following commmand :  

./tiffcrop -i -E l -H 10 -V 10 -S 8:4 -R 270 poc.tif a.tif

Platform - (Operating system, architecture, compiler details)

gcc --version
gcc (Ubuntu 9.3.0-17ubuntu1~20.04) 9.3.0
Copyright (C) 2019 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

uname -r
5.13.0-28-generic

uname -a
Linux ubuntu 5.13.0-28-generic #31~20.04.1-Ubuntu SMP Wed Jan 19 14:08:10 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux


lsb_release -a
No LSB modules are available.
Distributor ID:	Ubuntu
Description:	Ubuntu 20.04.3 LTS
Release:	20.04
Codename:	focal
  • AddressSanitizer logs ( ASAN )
TIFFReadDirectoryCheckOrder: Warning, Invalid TIFF directory; tags are not sorted in ascending order.
TIFFReadDirectory: Warning, Unknown field with tag 4610 (0x1202) encountered.
TIFFReadDirectory: Warning, TIFF directory is missing required "StripByteCounts" field, calculating from imagelength.
LogLuvInitState: No support for converting user data format to LogLuv.
LogLuvInitState: No support for converting user data format to LogLuv.
a.tif: Error, can't write strip 0.
LogLuvInitState: No support for converting user data format to LogLuv.
a.tif: Error, can't write strip 0.
=================================================================
==14324==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x631000027403 at pc 0x5572c0c22f82 bp 0x7fff6f03e140 sp 0x7fff6f03e130
READ of size 1 at 0x631000027403 thread T0
    #0 0x5572c0c22f81 in extractImageSection /home/targets/libtiff/tools/tiffcrop.c:6866
    #1 0x5572c0c25409 in writeImageSections /home/targets/libtiff/tools/tiffcrop.c:7097
    #2 0x5572c0bf8927 in main /home/targets/libtiff/tools/tiffcrop.c:2451
    #3 0x7efc355f20b2 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x270b2)
    #4 0x5572c0beadcd in _start (/home/targets/libtiff/tools/tiffcrop+0x267dcd)

0x631000027403 is located 1 bytes to the right of 76802-byte region [0x631000014800,0x631000027402)
allocated by thread T0 here:
    #0 0x7efc363a2bc8 in malloc (/lib/x86_64-linux-gnu/libasan.so.5+0x10dbc8)
    #1 0x5572c0cf5d57 in _TIFFmalloc /home/targets/libtiff/libtiff/tif_unix.c:314
    #2 0x5572c0beaf8c in limitMalloc /home/targets/libtiff/tools/tiffcrop.c:627
    #3 0x5572c0c2fabe in rotateImage /home/targets/libtiff/tools/tiffcrop.c:8479
    #4 0x5572c0c2ba64 in createCroppedImage /home/targets/libtiff/tools/tiffcrop.c:7771
    #5 0x5572c0bf82a2 in main /home/targets/libtiff/tools/tiffcrop.c:2404
    #6 0x7efc355f20b2 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x270b2)

SUMMARY: AddressSanitizer: heap-buffer-overflow /home/targets/libtiff/tools/tiffcrop.c:6866 in extractImageSection
Shadow bytes around the buggy address:
  0x0c627fffce30: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c627fffce40: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c627fffce50: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c627fffce60: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c627fffce70: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
=>0x0c627fffce80:[02]fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c627fffce90: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c627fffcea0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c627fffceb0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c627fffcec0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c627fffced0: 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
  Shadow gap:              cc
==14324==ABORTING

poc.zip

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