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Created attachment 1316980[details]
Triggered by " ./captoinfo POC11 "
Description of problem:
There is an illegal address access in function dump_uses() of libncurses.
Version-Release number of selected component (if applicable):
<= latest version
How reproducible:
./captoinfo POC11
Steps to Reproduce:
$ ./../../../captoinfo POC11
"id:000147,sig:11,src:001048,op:havoc,rep:2", line 2, col 605, terminal 'a': Very long string found. Missing separator?
"id:000147,sig:11,src:001048,op:havoc,rep:2", line 13, col 7, terminal 'a': Illegal character - '^J'
"id:000147,sig:11,src:001048,op:havoc,rep:2", line 13, col 7, terminal 'a': Legacy termcap allows only a trailing tc= clause
"id:000147,sig:11,src:001048,op:havoc,rep:2", line 13, col 7, terminal 'a': unknown capability 'k'
"id:000147,sig:11,src:001048,op:havoc,rep:2", line 14, col 5, terminal 'a': Missing separator
"id:000147,sig:11,src:001048,op:havoc,rep:2", line 14, col 7, terminal 'a': Illegal character (expected alphanumeric or @%&*!#) - 'M-4'
Segmentation fault
The GDB debugging information is as follows:
(gdb) set args POC5
(gdb) r
Starting program: /home/icy/secreal/ncurses-6.0-20170819/install/bin/captoinfo id:000147,sig:11,src:001048,op:havoc,rep:2
"id:000147,sig:11,src:001048,op:havoc,rep:2", line 2, col 605, terminal 'a': Very long string found. Missing separator?
"id:000147,sig:11,src:001048,op:havoc,rep:2", line 13, col 7, terminal 'a': Illegal character - '^J'
"id:000147,sig:11,src:001048,op:havoc,rep:2", line 13, col 7, terminal 'a': Legacy termcap allows only a trailing tc= clause
"id:000147,sig:11,src:001048,op:havoc,rep:2", line 13, col 7, terminal 'a': unknown capability 'k'
"id:000147,sig:11,src:001048,op:havoc,rep:2", line 14, col 5, terminal 'a': Missing separator
"id:000147,sig:11,src:001048,op:havoc,rep:2", line 14, col 7, terminal 'a': Illegal character (expected alphanumeric or @%&*!#) - 'M-4'
Program received signal SIGSEGV, Segmentation fault.
0x00007ffff7a5d462 in _IO_vfprintf_internal (s=s@entry=0x7fffffffa160, format=<optimized out>,
format@entry=0x459f57 "%s%s", ap=ap@entry=0x7fffffffa288) at vfprintf.c:1642
1642 vfprintf.c: No such file or directory.
(gdb) bt
#0 0x00007ffff7a5d462 in _IO_vfprintf_internal (s=s@entry=0x7fffffffa160, format=<optimized out>,
format@entry=0x459f57 "%s%s", ap=ap@entry=0x7fffffffa288) at vfprintf.c:1642
#1 0x00007ffff7a804eb in __IO_vsprintf (string=0x7fffffffa360 "use=\204", '\264' <repeats 195 times>...,
format=0x459f57 "%s%s", args=args@entry=0x7fffffffa288) at iovsprintf.c:42
#2 0x00007ffff7a63d17 in __sprintf (s=<optimized out>, format=<optimized out>) at sprintf.c:32
#3 0x000000000041a732 in dump_uses (
name=0xb4b4b4b4b4b4b4b4 <error: Cannot access memory at address 0xb4b4b4b4b4b4b4b4>, infodump=<optimized out>)
at ../progs/dump_entry.c:1618
#4 0x0000000000403ee3 in main (argc=<optimized out>, argv=<optimized out>) at ../progs/tic.c:1035
(gdb)
Trigged in:
dump_uses (name=0xb4b4b4b4b4b4b4b4 <error: Cannot access memory at address 0xb4b4b4b4b4b4b4b4>,
infodump=true) at ../progs/dump_entry.c:1618
1618 _nc_SPRINTF(buffer, _nc_SLIMIT(sizeof(buffer))
(gdb) list
1613 {
1614 char buffer[MAX_TERMINFO_LENGTH];
1615
1616 if (TcOutput())
1617 trim_trailing();
1618 _nc_SPRINTF(buffer, _nc_SLIMIT(sizeof(buffer))
1619 "%s%s", infodump ? "use=" : "tc=", name);
1620 wrap_concat1(buffer);
1621 }
1622
(gdb)
Actual results:
crash
Expected results:
crash
Additional info:
This vulnerability is detected by team OWL337, with our custom fuzzer collAFL. Please contact ganshuitao and chaoz.cn if you need more info about the team, the tool or the vulnerability.
Created attachment 1316980 [details] Triggered by " ./captoinfo POC11 " Description of problem: There is an illegal address access in function dump_uses() of libncurses. Version-Release number of selected component (if applicable): <= latest version How reproducible: ./captoinfo POC11 Steps to Reproduce: $ ./../../../captoinfo POC11 "id:000147,sig:11,src:001048,op:havoc,rep:2", line 2, col 605, terminal 'a': Very long string found. Missing separator? "id:000147,sig:11,src:001048,op:havoc,rep:2", line 13, col 7, terminal 'a': Illegal character - '^J' "id:000147,sig:11,src:001048,op:havoc,rep:2", line 13, col 7, terminal 'a': Legacy termcap allows only a trailing tc= clause "id:000147,sig:11,src:001048,op:havoc,rep:2", line 13, col 7, terminal 'a': unknown capability 'k' "id:000147,sig:11,src:001048,op:havoc,rep:2", line 14, col 5, terminal 'a': Missing separator "id:000147,sig:11,src:001048,op:havoc,rep:2", line 14, col 7, terminal 'a': Illegal character (expected alphanumeric or @%&*!#) - 'M-4' Segmentation fault The GDB debugging information is as follows: (gdb) set args POC5 (gdb) r Starting program: /home/icy/secreal/ncurses-6.0-20170819/install/bin/captoinfo id:000147,sig:11,src:001048,op:havoc,rep:2 "id:000147,sig:11,src:001048,op:havoc,rep:2", line 2, col 605, terminal 'a': Very long string found. Missing separator? "id:000147,sig:11,src:001048,op:havoc,rep:2", line 13, col 7, terminal 'a': Illegal character - '^J' "id:000147,sig:11,src:001048,op:havoc,rep:2", line 13, col 7, terminal 'a': Legacy termcap allows only a trailing tc= clause "id:000147,sig:11,src:001048,op:havoc,rep:2", line 13, col 7, terminal 'a': unknown capability 'k' "id:000147,sig:11,src:001048,op:havoc,rep:2", line 14, col 5, terminal 'a': Missing separator "id:000147,sig:11,src:001048,op:havoc,rep:2", line 14, col 7, terminal 'a': Illegal character (expected alphanumeric or @%&*!#) - 'M-4' Program received signal SIGSEGV, Segmentation fault. 0x00007ffff7a5d462 in _IO_vfprintf_internal (s=s@entry=0x7fffffffa160, format=<optimized out>, format@entry=0x459f57 "%s%s", ap=ap@entry=0x7fffffffa288) at vfprintf.c:1642 1642 vfprintf.c: No such file or directory. (gdb) bt #0 0x00007ffff7a5d462 in _IO_vfprintf_internal (s=s@entry=0x7fffffffa160, format=<optimized out>, format@entry=0x459f57 "%s%s", ap=ap@entry=0x7fffffffa288) at vfprintf.c:1642 #1 0x00007ffff7a804eb in __IO_vsprintf (string=0x7fffffffa360 "use=\204", '\264' <repeats 195 times>..., format=0x459f57 "%s%s", args=args@entry=0x7fffffffa288) at iovsprintf.c:42 #2 0x00007ffff7a63d17 in __sprintf (s=<optimized out>, format=<optimized out>) at sprintf.c:32 #3 0x000000000041a732 in dump_uses ( name=0xb4b4b4b4b4b4b4b4 <error: Cannot access memory at address 0xb4b4b4b4b4b4b4b4>, infodump=<optimized out>) at ../progs/dump_entry.c:1618 #4 0x0000000000403ee3 in main (argc=<optimized out>, argv=<optimized out>) at ../progs/tic.c:1035 (gdb) Trigged in: dump_uses (name=0xb4b4b4b4b4b4b4b4 <error: Cannot access memory at address 0xb4b4b4b4b4b4b4b4>, infodump=true) at ../progs/dump_entry.c:1618 1618 _nc_SPRINTF(buffer, _nc_SLIMIT(sizeof(buffer)) (gdb) list 1613 { 1614 char buffer[MAX_TERMINFO_LENGTH]; 1615 1616 if (TcOutput()) 1617 trim_trailing(); 1618 _nc_SPRINTF(buffer, _nc_SLIMIT(sizeof(buffer)) 1619 "%s%s", infodump ? "use=" : "tc=", name); 1620 wrap_concat1(buffer); 1621 } 1622 (gdb) Actual results: crash Expected results: crash Additional info: This vulnerability is detected by team OWL337, with our custom fuzzer collAFL. Please contact ganshuitao and chaoz.cn if you need more info about the team, the tool or the vulnerability.