Perimeter
1/4/2010
06:55 PM
Connect Directly
Google+
Twitter
RSS
E-Mail
50%
50%

Secure USB Flaw Exposed

USBs go under the microscope as vulnerability discovered in SanDisk secure USB leads to recall of Kingston USBs and updates to SanDisk, Verbatim USBs

A newly discovered flaw in USB vendor SanDisk's secure USB technology leaves the devices vulnerable to attack and has led to the recall and patching of multiple vendors' secure USB drive products.

A flaw resides in the password-handling process of SanDisk's Cruzer Enterprise USBs. SanDisk issued a security alert and update last month for multiple models of the Cruzer Enterprise drives that fixes the bug in the access-control features. The USB vendor emphasized in the alert that the flaw was not in the device hardware or firmware, but in the application that runs on the host system.

Meanwhile, secure USB vendor Kingston Technologies, which security experts say uses SanDisk software in its products, has recalled three of its secure USB drives, warning its customers that data on the encrypted drives could be accessed by seasoned attackers. Kingston recommended the drives be physically returned for updates.

The vulnerability, which was discovered by researchers at German penetration testing firm SySS, would basically let an unauthorized person access data on the drives by exploiting a weakness in the way the software handles passwords. Vulnerability finds for secure USB drives have been rare, with the biggest threats to these devices historically being physical loss or theft, or for becoming infected with malware. But secure USB experts say the newly discovered password-handling flaw in the SanDisk and Kingston USB drives is only the tip of the iceberg when it comes to potential bugs that could be found in secure USBs that rely on software.

SanDisk's Cruzer Enterprise USB flash drive, CZ22; CZ32; Cruzer Enterprise with McAfee USB flash drive, CZ38; and Cruzer Enterprise FIPS Edition with McAfee USB flash drive CZ46 are all affected by the flaw. Kingston's DataTraveler BlackBox (DTBB), DataTraveler Secure"Privacy Edition (DTSP), and DataTraveler Elite"Privacy Edition (DTEP) contain the vulnerability.

"It has recently been brought to our attention that a skilled person with the proper tools and physical access to the drives may be able to gain unauthorized access to data contained on [them]," according to a notice on Kingston's Website.

Verbatim, which also uses SanDisk technology, has issued an update alert on some of its USB products, as well.

Software-based password validation technology is a model that security experts say leaves the door open for trouble. And any software element is bound to be subject to some flaws.

"Any time you write software, whether as an interface to an encryption algorithm or business software, there will be vulnerabilities," says Jon Oltsik, principal analyst with Enterprise Strategy Group. "The question is, how do you manage these and do you catch them on time and fix them on time?"

David Jevans, CEO at IronKey, which makes ultra-secure USB devices, says what makes this vulnerability so significant is that it affects multiple vendors' products.

"The thing that's scary about this one is that it [affects] a bunch of products," he says. "It just proved that these companies are memory vendors making fundamental errors that mean every device has the same password ... We're going to see more security [research] companies attacking these things" and finding weaknesses, he says.

The problem lays in how the devices check passwords: They do so in software and all rely on the same underlying password, he says. "They are relying on software on a computer to check if a password is correct -- a security company would never do that," Jevans says. "You've got to check passwords in hardware. You can't rely on software."

All it takes is for a tool that unlocks these devices, which the German research team SySS did, he says. "Having the same magic word [that] unlocks it [is not secure]," he says. Authentication flaws basically defeat the purpose of the encryption in the USB devices, he says.

With USBs getting smarter, more software-laden, and being used as virtual machines, for instance, they are, in turn, becoming more attractive targets. IronKey's Jevans says the firmware on some of these devices could also be targeted: "An attacker could easily replace the firmware on it to unlock it or score a password or even modify software on the device to add malicious code so that when you plug it in, it infects the network," he says. "That's a vulnerability area that's going to get explored."

But Oltsik says secure USBs won't usurp easier targets. These devices will be victims of more targeted attacks or insider jobs, he says. "You have to either know something valuable is there and have the knowledge to hack it, or have something you're specifically going after," he says.

Oltsik recommends enterprises assess what data their users are saving to USB sticks. "If it's their own personal productivity files and there's no risk if those files are exposed, it's OK not doing anything" security-wise with them, he says. "But if people are saving things, like private or regulated data, you should have some port-blocking so they can only use USB sticks certified by your company."

And the USB stick should authenticate to the system using strong passwords or other forms of authentication. "And you want the USB to be encrypted as well so if it's lost or stolen the data is not exposed," Oltsik says.

Have a comment on this story? Please click "Discuss" 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
Register for Dark Reading Newsletters
White Papers
Cartoon
Current Issue
Dark Reading Tech Digest, Dec. 19, 2014
Software-defined networking can be a net plus for security. The key: Work with the network team to implement gradually, test as you go, and take the opportunity to overhaul your security strategy.
Flash Poll
Title Partner’s Role in Perimeter Security
Title Partner’s Role in Perimeter Security
Considering how prevalent third-party attacks are, we need to ask hard questions about how partners and suppliers are safeguarding systems and data.
Video
Slideshows
Twitter Feed
Dark Reading - Bug Report
Bug Report
Enterprise Vulnerabilities
From DHS/US-CERT's National Vulnerability Database
CVE-2014-5208
Published: 2014-12-22
BKBCopyD.exe in the Batch Management Packages in Yokogawa CENTUM CS 3000 through R3.09.50 and CENTUM VP through R4.03.00 and R5.x through R5.04.00, and Exaopc through R3.72.10, does not require authentication, which allows remote attackers to read arbitrary files via a RETR operation, write to arbit...

CVE-2014-7286
Published: 2014-12-22
Buffer overflow in AClient in Symantec Deployment Solution 6.9 and earlier on Windows XP and Server 2003 allows local users to gain privileges via unspecified vectors.

CVE-2014-8015
Published: 2014-12-22
The Sponsor Portal in Cisco Identity Services Engine (ISE) allows remote authenticated users to obtain access to an arbitrary sponsor's guest account via a modified HTTP request, aka Bug ID CSCur64400.

CVE-2014-8017
Published: 2014-12-22
The periodic-backup feature in Cisco Identity Services Engine (ISE) allows remote attackers to discover backup-encryption passwords via a crafted request that triggers inclusion of a password in a reply, aka Bug ID CSCur41673.

CVE-2014-8018
Published: 2014-12-22
Multiple cross-site scripting (XSS) vulnerabilities in Business Voice Services Manager (BVSM) pages in the Application Software in Cisco Unified Communications Domain Manager 8 allow remote attackers to inject arbitrary web script or HTML via a crafted URL, aka Bug IDs CSCur19651, CSCur18555, CSCur1...

Best of the Web
Dark Reading Radio
Archived Dark Reading Radio
Join us Wednesday, Dec. 17 at 1 p.m. Eastern Time to hear what employers are really looking for in a chief information security officer -- it may not be what you think.