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Created attachment 1291504[details]
Triggered by "captoinfo POC1"
Description of problem:
As ncurses/tinfo/comp_scan.c made lexical scanning，the nc_curr_token.tk_valstring(line:400) was initialized to Null by crafted input. It led to denial of service(crash) when the variable was transferred to _nc_save_str function as Null pointer.
Version-Release number of selected component (if applicable):
How reproducible:
captoinfo $POC
Steps to Reproduce:
$gdb captoinfo
…
(gdb) set args $POC
(gdb) r
…
(gdb) bt
#0 strlen () at ../sysdeps/x86_64/strlen.S:106
#1 0x0000000000446c1a in _nc_save_str (string=0x0) at ../ncurses/./tinfo/alloc_entry.c:99
#2 0x0000000000437037 in _nc_parse_entry (entryp=0x7fffffffaf98, literal=0, silent=false) at ../ncurses/./tinfo/parse_entry.c:463
#3 0x0000000000431183 in _nc_read_entry_source (fp=<optimized out>, buf=<optimized out>, literal=0, silent=false, hook=0x0) at ../ncurses/./tinfo/comp_parse.c:227
#4 0x0000000000402c57 in main (argc=<optimized out>, argv=<optimized out>) at ../progs/tic.c:929
Actual results:
crash
Expected results:
crash
Additional info:
Created attachment 1291504 [details] Triggered by "captoinfo POC1" Description of problem: As ncurses/tinfo/comp_scan.c made lexical scanning，the nc_curr_token.tk_valstring(line:400) was initialized to Null by crafted input. It led to denial of service(crash) when the variable was transferred to _nc_save_str function as Null pointer. Version-Release number of selected component (if applicable): How reproducible: captoinfo $POC Steps to Reproduce: $gdb captoinfo … (gdb) set args $POC (gdb) r … (gdb) bt #0 strlen () at ../sysdeps/x86_64/strlen.S:106 #1 0x0000000000446c1a in _nc_save_str (string=0x0) at ../ncurses/./tinfo/alloc_entry.c:99 #2 0x0000000000437037 in _nc_parse_entry (entryp=0x7fffffffaf98, literal=0, silent=false) at ../ncurses/./tinfo/parse_entry.c:463 #3 0x0000000000431183 in _nc_read_entry_source (fp=<optimized out>, buf=<optimized out>, literal=0, silent=false, hook=0x0) at ../ncurses/./tinfo/comp_parse.c:227 #4 0x0000000000402c57 in main (argc=<optimized out>, argv=<optimized out>) at ../progs/tic.c:929 Actual results: crash Expected results: crash Additional info: