Attached Link: Full Text Here

[Note that Microsoft has not yet produced a patch for this vulnerability. Any fully updated Windows XP SP2 or other Windows versions are vulnerable. Most anti-virus programs have new definitions out to detect and remove the payload, but several new variants have been discovered and may not be included in the definitions. You should manually check for new definitions daily.]

Vulnerability in Graphics Rendering Engine Could Allow Remote Code Execution.

Published: December 28, 2005 | Updated: December 30, 2005

Microsoft is investigating new public reports of a vulnerability in Windows. Microsoft is also aware of the public release of detailed exploit code that could be used to exploit this vulnerability. Based on our investigation, this exploit code could allow an attacker to execute arbitrary code on the user's system by hosting a specially crafted Windows Metafile (WMF) image on a malicious Web site. Microsoft is aware that this vulnerability is being actively exploited.

Microsoft has determined that an attacker using this exploit would have no way to force users to visit a malicious Web site. Instead, an attacker would have to persuade them to visit the Web site, typically by getting them to click a link that takes them to the attacker's Web site. In an e-mail based attack, customers would have to be persuaded to click on a link within a malicious e-mail or open an attachment that exploited the vulnerability. In both the web and email based attacks, the code would execute in the security context of the logged-on user. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights.

Microsoft will continue to investigate these reports and provide additional guidance depending on customer needs.

Customers are encouraged to keep their anti-virus software up to date. The Microsoft Windows AntiSpyware (Beta) can also help protect your system from spyware and other potentially unwanted software. Customers can also visit Windows Live Safety Center and are encouraged to use the Complete Scan option to check for and remove malicious software that take advantage of this vulnerability. We will continue to investigate these public reports.

Upon completion of this investigation, Microsoft will take appropriate action to help protect our customers. This will include providing a security update through our monthly release process or providing an out-of-cycle security update, depending on customer needs. If you are a Windows OneCare user and your current status is green, you are already protected from known malware that uses this vulnerability to attempt to attack systems.

Microsofts investigation into this malicious act is ongoing. We are working closely with our anti-virus partners and aiding law enforcement in its investigation.

Microsoft encourages users to exercise caution when they open e-mail and links in e-mail from untrusted sources. For more information about Safe Browsing, visit the Trustworthy Computing Web site.

We continue to encourage customers to follow our Protect Your PC guidance of enabling a firewall, applying software updates and installing antivirus software. Customers can learn more about these steps at the Protect Your PC Web site.

Customers who believe they have been attacked should contact their local FBI office or post their complaint on the Internet Fraud Complaint Center Web site. Customers outside the U.S. should contact the national law enforcement agency in their country.

Customers who believe they may have been affected by this issue can also contact Product Support Services. You can contact Product Support Services in the United States and Canada at no charge using the PC Safety line (1 866-PCSAFETY). Customers outside of the United States and Canada can locate the number for no-charge virus support by visiting the Microsoft Help and Support Web site.

Mitigating Factors:

In a Web-based attack scenario, an attacker would have to host a Web site that contains a Web page that is used to exploit this vulnerability. An attacker would have no way to force users to visit a malicious Web site. Instead, an attacker would have to persuade them to visit the Web site, typically by getting them to click a link that takes them to the attacker's Web site.

In an E-mail based attack of the current exploit, customers would have to be persuaded to click on a link within a malicious e-mail or open an attachment that exploited the vulnerability.

An attacker who successfully exploited this vulnerability could gain the same user rights as the local user. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights.

By default, Internet Explorer on Windows Server 2003, on Windows Server 2003 Service Pack 1, on Windows Server 2003 with Service Pack 1 for Itanium-based Systems, and on Windows Server 2003 x64 Edition runs in a restricted mode that is known as Enhanced Security Configuration This mode mitigates this vulnerability where the e-mail vector is concerned although clicking on a link would still put users at risk. In Windows Server 2003, Microsoft Outlook Express uses plain text for reading and sending messages by default. When replying to an e-mail message that is sent in another format, the response is formatted in plain text. See the FAQ section of this vulnerability for more information about Internet Explorer Enhanced Security Configuration.

Suggested Actions

Un-register the Windows Picture and Fax Viewer (Shimgvw.dll) on Windows XP Service Pack 1; Windows XP Service Pack 2; Windows Server 2003 and Windows Server 2003 Service Pack 1

Microsoft has tested the following workaround. While this workaround will not correct the underlying vulnerability, it helps block known attack vectors. When a workaround reduces functionality, it is identified in the following section.

Note The following steps require Administrative privileges. It is recommended that the machine be restarted after applying this workaround. It is also possible to log out and log back in after applying the workaround. However, the recommendation is to restart the machine.

To un-register Shimgvw.dll, follow these steps:

1. Click Start, click Run, type "regsvr32 -u %windir%system32shimgvw.dll" (without the quotation marks), and then click OK.

2. A dialog box appears to confirm that the un-registration process has succeeded. Click OK to close the dialog box.

Impact of Workaround: The Windows Picture and Fax Viewer will no longer be started when users click on a link to an image type that is associated with the Windows Picture and Fax Viewer.

To undo this change, re-register Shimgvw.dll by following the above steps. Replace the text in Step 1 with regsvr32 %windir%system32shimgvw.dll (without the quotation marks).

Microsoft encourages users to exercise caution when they open e-mail and links in e-mail from untrusted sources. For more information about Safe Browsing, visit the Trustworthy Computing Web site.

Customers in the U.S. and Canada who believe they may have been affected by this possible vulnerability can receive technical support from Microsoft Product Support Services at 1-866-PCSAFETY. There is no charge for support that is associated with security update issues or viruses." International customers can receive support by using any of the methods that are listed at Security Help and Support for Home Users Web site.

All customers should apply the most recent security updates released by Microsoft to help ensure that their systems are protected from attempted exploitation. Customers who have enabled Automatic Updates will automatically receive all Windows updates. For more information about security updates, visit the Microsoft Security Web site.

Protect Your PC

We continue to encourage customers follow our Protect Your PC guidance of enabling a firewall, getting software updates and installing ant-virus software. Customers can learn more about these steps by visiting Protect Your PC Web site.

For more information about staying safe on the Internet, customers can visit the Microsoft Security Home Page.

Keep Windows Updated

All Windows users should apply the latest Microsoft security updates to help make sure that their computers are as protected as possible. If you are not sure whether your software is up to date, visit the Microsoft Update Web site, scan your computer for available updates, and install any high-priority updates that are offered to you. If you have Automatic Updates enabled, the updates are delivered to you when they are released, but you have to make sure you install them.

After have fulfilled all the steps, 1- Delete Windows 2- Install Linux

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