Risk
7/18/2010
03:02 PM
George V. Hulme
George V. Hulme
Commentary
50%
50%

Microsoft Warns Of Critical Vulnerability

Microsoft Friday warned its customers that attackers are targeting an unpatched and critical Windows vulnerability.

Microsoft Friday warned its customers that attackers are targeting an unpatched and critical Windows vulnerability.Microsoft Security Advisory (2286198) addresses a previously known vulnerability that makes it possible to exploit removable drives. Microsoft claims it has so far seen only limited, targeted attacks:

The vulnerability exists because Windows incorrectly parses shortcuts in such a way that malicious code may be executed when the user clicks the displayed icon of a specially crafted shortcut. This vulnerability is most likely to be exploited through removable drives. For systems that have AutoPlay disabled, customers would need to manually browse to the root folder of the removable disk in order for the vulnerability to be exploited. For Windows 7 systems, AutoPlay functionality for removable disks is automatically disabled.

Anti-virus vendor Sophos warns that this vulnerability makes it possible for attackers to exploit all versions of Windows, including Windows 7:

The flaw is in how shell32.dll tries to load control panel icons from applets. By making a specially crafted shortcut pointing to a malicious file, you can make Windows Explorer blindly execute the malicious file when the location of the shortcut is merely browsed to. In this case the malicious file is a rootkit and a dropper that immediately hide the special shortcut (.lnk) files. Allowing executable code to load in the process of trying to retrieve an icon seems like a major oversight in the design of Windows.

Below is an interesting video produced by Sophos that demonstrates the attack underway.

Currently, Microsoft's advice is to disable icons for shortcuts. While a savvy home user may be able to pull that off - it's unlikely to be practical in a business environment. Most users will think their PC is "broken" and wonder why files won't launch. They also suggest disabling the WebDav WebClient. That's another less-than-ideal solution if your enterprise uses SharePoint.

That means, unfortunately, your best bet may be to make certain that your anti-malware software protects against the current batch of exploits. And wait for the inevitable patch, which hopefully comes on or before August's Patch Tuesday.

Comment  | 
Print  | 
More Insights
Register for Dark Reading Newsletters
White Papers
Cartoon
Current Issue
Flash Poll
Video
Slideshows
Twitter Feed
Dark Reading - Bug Report
Bug Report
Enterprise Vulnerabilities
From DHS/US-CERT's National Vulnerability Database
CVE-2001-1594
Published: 2015-08-04
GE Healthcare eNTEGRA P&R has a password of (1) entegra for the entegra user, (2) passme for the super user of the Polestar/Polestar-i Starlink 4 upgrade, (3) 0 for the entegra user of the Codonics printer FTP service, (4) eNTEGRA for the eNTEGRA P&R user account, (5) insite for the WinVNC Login, an...

CVE-2002-2445
Published: 2015-08-04
GE Healthcare Millennium MG, NC, and MyoSIGHT has a default password of (1) root.genie for the root user, (2) "service." for the service user, (3) admin.genie for the admin user, (4) reboot for the reboot user, and (5) shutdown for the shutdwon user, which has unspecified impact and attack vectors.

CVE-2002-2446
Published: 2015-08-04
GE Healthcare Millennium MG, NC, and MyoSIGHT has a password of insite.genieacq for the insite account that cannot be changed without disabling product functionality for remote InSite support, which has unspecified impact and attack vectors.

CVE-2003-1603
Published: 2015-08-04
GE Healthcare Discovery VH has a default password of (1) interfile for the ftpclient user of the Interfile server or (2) "2" for the LOCAL user of the FTP server for the Codonics printer, which has unspecified impact and attack vectors.

CVE-2004-2777
Published: 2015-08-04
GE Healthcare Centricity Image Vault 3.x has a password of (1) gemnet for the administrator account, (2) webadmin for the webadmin administrator account of the ASACA DVD library, (3) an empty value for the gemsservice account of the Ultrasound Database, and possibly (4) gemnet2002 for the gemnet2002...

Dark Reading Radio
Archived Dark Reading Radio
What’s the future of the venerable firewall? We’ve invited two security industry leaders to make their case: Join us and bring your questions and opinions!