This month’s Stuxnet attack (read our FAQ here), reiterates the importance of quickly patching security holes as fixes become available and having a broad intrusion prevention system (IPS) in place. Even with proper patch management, all it takes is one zero-day vulnerability to be exploited (even in low volume) to potentially cause a significant impact. While the Stuxnet attack is still under investigation, the fact that a trojan associated with the exploit was seemingly developed to target industrial control systems underscores this point. This is also a good example of how little interaction is required by the end user to become infected. The Stuxnet exploit attacked a Windows Shell vulnerability (CVE-2010-2568). To launch its attack, a user simply opened a folder.
“We saw a similar attack method with PDF files through JBIG2 image streams and Windows shell extensions back in February 2009 (CVE-2009-0658), where simply browsing a folder could trigger an infection,” Manky continued. “Fortinet detects the vulnerability associated with the Stuxnet attack as 'MS.Windows.Shell.LNK.Code.Execution,' and generically detects the exploited ‘.LNK’ payload with antivirus as 'W32/ShellLink.a!exploit.CVE20102568'. As of writing, there are workarounds but no official patch has been released from Microsoft.”
Windows Help Center Vulnerability Exploited
On June 5, vulnerability within the Windows Help and Support Center that could allow remote code execution was publicly disclosed. Like Stuxnet, this is yet another example of a zero-day vulnerability successfully attacked before a patch is made available. We witnessed attacks on the vulnerability as early as June 11th before Microsoft issued a patch for CVE-2010-1855 on July 13th. The attacks that occurred through Websites were made more potent because they were launched through the HCP protocol handler, which is used by all browsers. In many cases Websites that serve exploits will try to fingerprint browsers and launch attack code tailored to those browsers.
FortiGuard Labs compiled threat statistics and trends for July based on data collected from FortiGate' network security appliances and intelligence systems in production worldwide. Customers who use Fortinet’s FortiGuard Subscription Services should already be protected against the threats outlined in this report.
To read the full July Threat Landscape report which includes the top threat rankings in each category, please visit: http://www.fortiguard.com/report/roundup_july_2010.html. For ongoing threat research, bookmark the FortiGuard Center or add it to your RSS feed. Additional discussion on security technologies and threat analysis can be found at the Fortinet Security Blog at http://blog.fortinet.com. To learn more about FortiGuard Subscription Services, visit http://www.fortinet.com/products/fortiguard.html.
PR Manager, Corporate Communications
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