Rule:

--
Sid:
4982

--
Summary:
This event is generated when an attempt is made to return to a web client a file with a Class ID (CLSID) embedded in the file.

--
Impact:
A successful attack may result in the execution of code of the attackers choosing possibly leading to control of the target machine.

--
Detailed Information:
Internet Explorer does not correctly handle ActiveX controls. Certain COM objects can be called by Internet Explorer and executed as ActiveX controls. When this is achieved, it may be possible for an attacker to overwrite portions of memory and execute code of their choosing.

There are multiple CLSIDs associated with a COM component that could be used for malicious purposes. This event is generated when the CLSID for Adodb.stream is detected.

--
Affected Systems:
Microsoft Internet Explorer 6 for Microsoft Windows XP SP2
Microsoft Internet Explorer 6 for Microsoft Windows XP SP1
Microsoft Office 2002
Microsoft Visual Studio .NET 2002

--
Attack Scenarios:
An attacker can entice a user to visit a web server that will return a malicious file with a file name that contains a CLSID, perhaps enabling the execution of the malicious code when the file is opened.

--
Ease of Attack:
Simple. Exploit code is publicly available.

--
False Positives:
None known.

--
False Negatives:
None known.

--
Corrective Action:
Upgrade to the latest non-affected version of the software.

Apply the appropriate vendor supplied patches as they become available.

--
Contributors:
Sourcefire Vulnerability Research Team
Alex Kirk <akirk@sourcefire.com>
Judy Novak <judy.novak@sourcefire.com>
Nigel Houghton <nigel.houghton@sourcefire.com>

--
Additional References

--
