Bug: heap-buffer-overflow in captoinfo.c:321

[puppet]

Version:  ncurses 6.2.20200212
OS: Ubuntu 16.04 LTS
POC: https://github.com/puppet-meteor/NLP_POC/blob/master/infotocap/POC_13_000511
cmd: ./infotocap POC
ASAN log:

=================================================================
==35739==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x62100001c900 at pc 0x000000438979 bp 0x7fffffffbc10 sp 0x7fffffffbc00
READ of size 1 at 0x62100001c900 thread T0
    #0 0x438978 in _nc_captoinfo ../../ncurses/tinfo/captoinfo.c:321
    #1 0x448719 in _nc_parse_entry ../../ncurses/tinfo/parse_entry.c:548
    #2 0x43ddc7 in _nc_read_entry_source ../../ncurses/tinfo/comp_parse.c:226
    #3 0x4055e9 in main ../../progs/tic.c:963
    #4 0x7ffff6ac082f in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x2082f)
    #5 0x4024e8 in _start (/data3/ASAN/ncurses-6.2/ASAN/infotocap+0x4024e8)

0x62100001c900 is located 0 bytes to the right of 4096-byte region [0x62100001b900,0x62100001c900)
allocated by thread T0 here:
    #0 0x7ffff6f02602 in malloc (/usr/lib/x86_64-linux-gnu/libasan.so.2+0x98602)
    #1 0x443c07 in _nc_get_token ../../ncurses/tinfo/comp_scan.c:448
    #2 0x446b64 in _nc_parse_entry ../../ncurses/tinfo/parse_entry.c:265
    #3 0x43ddc7 in _nc_read_entry_source ../../ncurses/tinfo/comp_parse.c:226
    #4 0x4055e9 in main ../../progs/tic.c:963
    #5 0x7ffff6ac082f in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x2082f)

SUMMARY: AddressSanitizer: heap-buffer-overflow ../../ncurses/tinfo/captoinfo.c:321 _nc_captoinfo
Shadow bytes around the buggy address:
  0x0c427fffb8d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c427fffb8e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c427fffb8f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c427fffb900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c427fffb910: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
=>0x0c427fffb920:[fa]fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c427fffb930: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c427fffb940: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c427fffb950: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c427fffb960: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c427fffb970: 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
  Heap right redzone:      fb
  Freed heap region:       fd
  Stack left redzone:      f1
  Stack mid redzone:       f2
  Stack right redzone:     f3
  Stack partial redzone:   f4
  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
==35739==ABORTING

	





	



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