Hi,
As of ncurses 6.1 - patch 20191012, there are two crashes resulting from heap-buffer-overflow.
./tic hbo__captoinfo.c:320_1
"./hbo__captoinfo.c:320_1", line 2, col 7, terminal '0': Missing separator
=================================================================
==2711==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x621000002500 at pc 0x000000515729 bp 0x7fffffff9190 sp 0x7fffffff9188
READ of size 1 at 0x621000002500 thread T0
#0 0x515728 in _nc_captoinfo /home/hongxu/fuzzing/ncurses/ncurses-asan/ncurses/../ncurses/./tinfo/captoinfo.c:320:12
#1 0x52e1ab in _nc_parse_entry /home/hongxu/fuzzing/ncurses/ncurses-asan/ncurses/../ncurses/./tinfo/parse_entry.c:547:13
#2 0x523d81 in _nc_read_entry_source /home/hongxu/fuzzing/ncurses/ncurses-asan/ncurses/../ncurses/./tinfo/comp_parse.c:225:6
#3 0x4c4a91 in main /home/hongxu/fuzzing/ncurses/ncurses-asan/progs/../progs/tic.c:961:5
#4 0x7ffff6e24b96 in __libc_start_main /build/glibc-OTsEL5/glibc-2.27/csu/../csu/libc-start.c:310
#5 0x41b4f9 in _start (/home/hongxu/fuzzing/ncurses/ncurses-asan/install/bin/tic+0x41b4f9)
0x621000002500 is located 0 bytes to the right of 4096-byte region [0x621000001500,0x621000002500)
allocated by thread T0 here:
#0 0x49390d in malloc (/home/hongxu/fuzzing/ncurses/ncurses-asan/install/bin/tic+0x49390d)
#1 0x527946 in _nc_get_token /home/hongxu/fuzzing/ncurses/ncurses-asan/ncurses/../ncurses/./tinfo/comp_scan.c:447:16
#2 0x52b798 in _nc_parse_entry /home/hongxu/fuzzing/ncurses/ncurses-asan/ncurses/../ncurses/./tinfo/parse_entry.c:264:18
#3 0x523d81 in _nc_read_entry_source /home/hongxu/fuzzing/ncurses/ncurses-asan/ncurses/../ncurses/./tinfo/comp_parse.c:225:6
#4 0x4c4a91 in main /home/hongxu/fuzzing/ncurses/ncurses-asan/progs/../progs/tic.c:961:5
#5 0x7ffff6e24b96 in __libc_start_main /build/glibc-OTsEL5/glibc-2.27/csu/../csu/libc-start.c:310
SUMMARY: AddressSanitizer: heap-buffer-overflow /home/hongxu/fuzzing/ncurses/ncurses-asan/ncurses/../ncurses/./tinfo/captoinfo.c:320:12 in _nc_captoinfo
Shadow bytes around the buggy address:
0x0c427fff8450: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c427fff8460: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c427fff8470: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c427fff8480: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c427fff8490: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
=>0x0c427fff84a0:[fa]fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c427fff84b0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c427fff84c0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c427fff84d0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c427fff84e0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c427fff84f0: 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
==2711==ABORTING
and
./tic hbo__tic.c:218_1
"./hbo__tic.c:218_1", line 1, col 7, terminal '0': Illegal character - '~W'
"./hbo__tic.c:218_1", line 1, col 7, terminal '0': unknown capability '0'
"./hbo__tic.c:218_1", line 1, col 14, terminal '0': Missing separator
"./hbo__tic.c:218_1", line 1, col 14, terminal '0': acsc string synthesized from XENIX capabilities
=================================================================
==20648==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x60300000005b at pc 0x0000004ca867 bp 0x7fffffff8d30 sp 0x7fffffff8d28
READ of size 1 at 0x60300000005b thread T0
#0 0x4ca866 in write_it /home/hongxu/fuzzing/ncurses/ncurses-asan/progs/../progs/tic.c:218:19
#1 0x4c510d in main /home/hongxu/fuzzing/ncurses/ncurses-asan/progs/../progs/tic.c:1010:7
#2 0x7ffff6e24b96 in __libc_start_main /build/glibc-OTsEL5/glibc-2.27/csu/../csu/libc-start.c:310
#3 0x41b4f9 in _start (/home/hongxu/fuzzing/ncurses/ncurses-asan/install/bin/tic+0x41b4f9)
0x60300000005b is located 0 bytes to the right of 27-byte region [0x603000000040,0x60300000005b)
allocated by thread T0 here:
#0 0x49390d in malloc (/home/hongxu/fuzzing/ncurses/ncurses-asan/install/bin/tic+0x49390d)
#1 0x54cc53 in _nc_wrap_entry /home/hongxu/fuzzing/ncurses/ncurses-asan/ncurses/../ncurses/./tinfo/alloc_entry.c:177:5
#2 0x52e5fe in _nc_parse_entry /home/hongxu/fuzzing/ncurses/ncurses-asan/ncurses/../ncurses/./tinfo/parse_entry.c:601:5
#3 0x523d81 in _nc_read_entry_source /home/hongxu/fuzzing/ncurses/ncurses-asan/ncurses/../ncurses/./tinfo/comp_parse.c:225:6
#4 0x4c4a91 in main /home/hongxu/fuzzing/ncurses/ncurses-asan/progs/../progs/tic.c:961:5
#5 0x7ffff6e24b96 in __libc_start_main /build/glibc-OTsEL5/glibc-2.27/csu/../csu/libc-start.c:310
SUMMARY: AddressSanitizer: heap-buffer-overflow /home/hongxu/fuzzing/ncurses/ncurses-asan/progs/../progs/tic.c:218:19 in write_it
Shadow bytes around the buggy address:
0x0c067fff7fb0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c067fff7fc0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c067fff7fd0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c067fff7fe0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c067fff7ff0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
=>0x0c067fff8000: fa fa 00 00 03 fa fa fa 00 00 00[03]fa fa fa fa
0x0c067fff8010: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c067fff8020: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c067fff8030: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c067fff8040: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c067fff8050: 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
==20648==ABORTING
hbo__captoinfo.c:320_1.asan.txt
hbo__captoinfo.c:320_1