jtr+pyrit+cowpatty buffer owerflow....

[Source]

hi ,
i become when i writing this command:

/pentest/passwords/john/john --stdout --incremental:all | pyrit -e my_WLAN -i - -o -passthrough | cowpatty -r /root/e5e7-06.cap -d - -s my_WLAN

all time this error

cowpatty 4.6 - WPA-PSK dictionary attack. <jwright@hasborg.com>

Collected all necessary data to mount crack against WPA2/PSK passphrase.
Starting dictionary attack.  Please be patient.
Using STDIN for hashfile contents.
*** buffer overflow detected ***: cowpatty terminated
======= Backtrace: =========
/lib/tls/i686/cmov/libc.so.6(__fortify_fail+0x50)[0xb74ec390]
/lib/tls/i686/cmov/libc.so.6(+0xe12ca)[0xb74eb2ca]
cowpatty[0x804a7a7]
cowpatty[0x804ac4a]
/lib/tls/i686/cmov/libc.so.6(__libc_start_main+0xe6)[0xb7420bd6]
cowpatty[0x8048c71]
======= Memory map: ========
08048000-0804d000 r-xp 00000000 08:16 402173     /usr/local/bin/cowpatty
0804d000-0804e000 r--p 00004000 08:16 402173     /usr/local/bin/cowpatty
0804e000-0804f000 rw-p 00005000 08:16 402173     /usr/local/bin/cowpatty
0916b000-0918c000 rw-p 00000000 00:00 0          [heap]
b73c1000-b73de000 r-xp 00000000 08:16 915798     /lib/libgcc_s.so.1
b73de000-b73df000 r--p 0001c000 08:16 915798     /lib/libgcc_s.so.1
b73df000-b73e0000 rw-p 0001d000 08:16 915798     /lib/libgcc_s.so.1
b73f0000-b73f1000 rw-p 00000000 00:00 0 
b73f1000-b7404000 r-xp 00000000 08:16 915933     /lib/libz.so.1.2.3.3
b7404000-b7405000 r--p 00012000 08:16 915933     /lib/libz.so.1.2.3.3
b7405000-b7406000 rw-p 00013000 08:16 915933     /lib/libz.so.1.2.3.3
b7406000-b7408000 r-xp 00000000 08:16 919909     /lib/tls/i686/cmov/libdl-2.11.1.so
b7408000-b7409000 r--p 00001000 08:16 919909     /lib/tls/i686/cmov/libdl-2.11.1.so
b7409000-b740a000 rw-p 00002000 08:16 919909     /lib/tls/i686/cmov/libdl-2.11.1.so
b740a000-b755d000 r-xp 00000000 08:16 919903     /lib/tls/i686/cmov/libc-2.11.1.so
b755d000-b755e000 ---p 00153000 08:16 919903     /lib/tls/i686/cmov/libc-2.11.1.so
b755e000-b7560000 r--p 00153000 08:16 919903     /lib/tls/i686/cmov/libc-2.11.1.so
b7560000-b7561000 rw-p 00155000 08:16 919903     /lib/tls/i686/cmov/libc-2.11.1.so
b7561000-b7565000 rw-p 00000000 00:00 0 
b7565000-b769d000 r-xp 00000000 08:16 916686     /lib/i686/cmov/libcrypto.so.0.9.8
b769d000-b76a5000 r--p 00137000 08:16 916686     /lib/i686/cmov/libcrypto.so.0.9.8
b76a5000-b76b3000 rw-p 0013f000 08:16 916686     /lib/i686/cmov/libcrypto.so.0.9.8
b76b3000-b76b7000 rw-p 00000000 00:00 0 
b76b7000-b76e4000 r-xp 00000000 08:16 1715758    /usr/lib/libpcap.so.1.0.0
b76e4000-b76e5000 r--p 0002c000 08:16 1715758    /usr/lib/libpcap.so.1.0.0
b76e5000-b76e6000 rw-p 0002d000 08:16 1715758    /usr/lib/libpcap.so.1.0.0
b76f4000-b76f8000 rw-p 00000000 00:00 0 
b76f8000-b76f9000 r-xp 00000000 00:00 0          [vdso]
b76f9000-b7714000 r-xp 00000000 08:16 915741     /lib/ld-2.11.1.so
b7714000-b7715000 r--p 0001a000 08:16 915741     /lib/ld-2.11.1.so
b7715000-b7716000 rw-p 0001b000 08:16 915741     /lib/ld-2.11.1.so
bfb83000-bfba4000 rw-p 00000000 00:00 0          [stack]
Aborted

how can i fix this?

thanx Source

[Source]

ok i have fix this overflow ...i have edit the makefile & genpmk.c

first download the Source code from : http://wirelessdefence.org/Contents/coWPAttyMain.htm

change in the Makefile, at line 14

# <dragorn> make is a twisted beast
##################################
LDLIBS          = -lpcap
CFLAGS          = -pipe -Wall -DOPENSSL
#CFLAGS         += -O2
LDLIBS          += -lcrypto
CFLAGS          += -g3 -ggdb

and in the genpmk.c, at line 215....

printf("File %s exists, appending new data.\n", opt.hashfile);
                fpout = fopen(opt.hashfile, "ab");
                if (fopen == NULL) {

after this make new files and copy the genpmk & cowpatty binary into your
/usr/local/bin/

rename your original files & enjoy!!

greez Source