Dark Reading is part of the Informa Tech Division of Informa PLC

This site is operated by a business or businesses owned by Informa PLC and all copyright resides with them.Informa PLC's registered office is 5 Howick Place, London SW1P 1WG. Registered in England and Wales. Number 8860726.

Vulnerabilities / Threats

2/23/2011
06:17 PM
Connect Directly
Google+
Twitter
RSS
E-Mail
50%
50%

Many Microsoft Vulnerabilities Not Exploitable With Proper System Configuration

New study by eEye finds that just disabling some unneeded features can mitigate most attacks against flaws

Not all security vulnerabilities can actually be exploited in an attack, and new research shows that a high percentage of the Microsoft software bugs reported last year aren't exploitable if the systems are properly configured.

Renowned researcher and eEye founder/CTO Marc Maiffret and his team are studying all of the Microsoft Windows vulnerabilities from 2010, and have found that misconfiguration is a major factor in the risk of attack. Maiffret, whose company will release details of their findings next month, says it's about reducing the attack surface and prioritizing patching.

"[These] Microsoft vulnerabilities would be a nonevent if the systems were properly configured," Maiffret says. A few configuration changes can make all the difference, he says.

Among the configuration mistakes that can leave Windows systems vulnerable to attack are leaving Web-based Distributed Authoring and Versioning (WebDAV) and Task Scheduler enabled, Maiffret says. WebDAV is a tool for collaborating among users in editing and managing documents and files stored on Web servers; Task Scheduler lets you automatically set routine tasks, such as starting an application or sending an email, for example.

But these and other features are often left on by default, and may not even be necessary.

"With a lot of attacks at the end of year, one of the most common ways to deliver file format vulnerabilities was over WebDAV. But, in reality, most businesses don't use WebDAV and don't need it, yet it's on by default," he says.

By simply turning it off, it makes it that much harder for attackers to leverage those Windows vulnerabilities to break in, he says.

There also are several Microsoft Office vulnerabilities that stem from built-in Office conversion tools, he says. "If you're running a new version of Office ... I can send you a malformed document [this way]," he says.

Office conversion tools can and should be disabled, Maiffret says. "The reality is that most people are using standardized versions of Office," he says. "So disabling the whole Office conversion thing" makes sense, he says, and makes those bugs unexploitable. One of the zero-day vulnerabilities used in the Stuxnet attack was one in Windows Task Scheduler. "Task Scheduler is one you wouldn't [necessarily] know" was running, says Maiffret, noting that most of the SCADA environments run "vanilla" Windows systems that left them vulnerable to this type of attack.

Maiffret says the key is to configure something like Task Scheduler such that it can't be hit with a privilege escalation attack like Stuxnet used with that flaw. The bug was used by Stuxnet for privilege escalation after the attacker had compromised the machine.

But proper configuration still won't stop a determined attacker. "You're never going to keep the bad guys out. If someone wants to get in, they will," Maiffret says. "But getting the configuration [right] is the first" step to defending against attack, he says.

Still, unnecessary features have become less of an issue in the latest Microsoft products, according to Andrew Storms, director of security operations for nCircle. "With Microsoft Server 2008, it's just a core server, and then you decide what you want to lay on top of that. You build from the base," Storms notes. "It's all about reducing the footprint and potential for exploits and vulnerabilities."

Managing risk is the key, Storms says. And Microsoft provides mitigation strategies in its advisories, which helps since not all patches can be or should be applied right away.

Meanwhile, eEye's Maiffret says he hopes the firm's research will help organizations better prioritize patches and reduce their risk of attack. "You don't have to have panic patching," he says.

eEye plans to include information on its Vulnerability Expert Forum on how to mitigate attacks against newly revealed vulnerabilities for which Microsoft issues patches.

Have a comment on this story? Please click "Add Your Comment" below. If you'd like to contact Dark Reading's editors directly, send us a message.

Kelly Jackson Higgins is Executive Editor at DarkReading.com. She is an award-winning veteran technology and business journalist with more than two decades of experience in reporting and editing for various publications, including Network Computing, Secure Enterprise ... View Full Bio

Comment  | 
Print  | 
More Insights
Comments
Newest First  |  Oldest First  |  Threaded View
AI Is Everywhere, but Don't Ignore the Basics
Howie Xu, Vice President of AI and Machine Learning at Zscaler,  9/10/2019
Fed Kaspersky Ban Made Permanent by New Rules
Dark Reading Staff 9/11/2019
Register for Dark Reading Newsletters
White Papers
Video
Cartoon Contest
Current Issue
7 Threats & Disruptive Forces Changing the Face of Cybersecurity
This Dark Reading Tech Digest gives an in-depth look at the biggest emerging threats and disruptive forces that are changing the face of cybersecurity today.
Flash Poll
The State of IT Operations and Cybersecurity Operations
The State of IT Operations and Cybersecurity Operations
Your enterprise's cyber risk may depend upon the relationship between the IT team and the security team. Heres some insight on what's working and what isn't in the data center.
Twitter Feed
Dark Reading - Bug Report
Bug Report
Enterprise Vulnerabilities
From DHS/US-CERT's National Vulnerability Database
CVE-2019-16317
PUBLISHED: 2019-09-14
In Pimcore before 5.7.1, an attacker with limited privileges can trigger execution of a .phar file via a phar:// URL in a filename parameter, because PHAR uploads are not blocked and are reachable within the phar://../../../../../../../../var/www/html/web/var/assets/ directory, a different vulnerabi...
CVE-2019-16318
PUBLISHED: 2019-09-14
In Pimcore before 5.7.1, an attacker with limited privileges can bypass file-extension restrictions via a 256-character filename, as demonstrated by the failure of automatic renaming of .php to .php.txt for long filenames, a different vulnerability than CVE-2019-10867 and CVE-2019-16317.
CVE-2019-16307
PUBLISHED: 2019-09-14
A Reflected Cross-Site Scripting (XSS) vulnerability in the webEx module in webExMeetingLogin.jsp and deleteWebExMeetingCheck.jsp in Fuji Xerox DocuShare through 7.0.0.C1.609 allows remote attackers to inject arbitrary web script or HTML via the handle parameter (webExMeetingLogin.jsp) and meetingKe...
CVE-2019-16294
PUBLISHED: 2019-09-14
SciLexer.dll in Scintilla in Notepad++ (x64) before 7.7 allows remote code execution or denial of service via Unicode characters in a crafted .ml file.
CVE-2019-16309
PUBLISHED: 2019-09-14
FlameCMS 3.3.5 has SQL injection in account/login.php via accountName.