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cjpeg's Issues

heap over flow

Enviroment

ubuntu18.04

requirement

compile with asan

command

./cjpeg poc  tmp

poc

https://drive.google.com/file/d/1k8lIpKbYxzWMqWrV8_w_an6e806Fa4lq/view?usp=sharing

output

=================================================================
==32780==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x617000000320 at pc 0x55b30073ede6 bp 0x7fff991680b0 sp 0x7fff991680a0
READ of size 1 at 0x617000000320 thread T0
    #0 0x55b30073ede5 in rgb_to_ycbcr /home/fuzz/cjpeg/cjpeg.c:72
    #1 0x55b300747242 in jpeg_encode /home/fuzz/cjpeg/cjpeg.c:292
    #2 0x55b30072c7c6 in main /home/fuzz/cjpeg/cjpeg.c:378
    #3 0x7f1f467a5bf6 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x21bf6)
    #4 0x55b30072ca19 in _start (/home/micro/all/found/cjpeg/cjpeg_asan+0x2a19)

0x617000000320 is located 0 bytes to the right of 672-byte region [0x617000000080,0x617000000320)
allocated by thread T0 here:
    #0 0x7f1f46c53b40 in __interceptor_malloc (/usr/lib/x86_64-linux-gnu/libasan.so.4+0xdeb40)
    #1 0x55b30072d034 in init_mem /home/fuzz/cjpeg/cio.c:76

SUMMARY: AddressSanitizer: heap-buffer-overflow /home/fuzz/cjpeg/cjpeg.c:72 in rgb_to_ycbcr
Shadow bytes around the buggy address:
  0x0c2e7fff8010: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c2e7fff8020: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c2e7fff8030: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c2e7fff8040: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c2e7fff8050: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
=>0x0c2e7fff8060: 00 00 00 00[fa]fa fa fa fa fa fa fa fa fa fa fa
  0x0c2e7fff8070: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c2e7fff8080: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c2e7fff8090: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c2e7fff80a0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c2e7fff80b0: 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
==32780==ABORTING

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