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.


09:55 AM
Connect Directly

New Tool Dusts for Fingerprints

A 'fingerprinting' tool that cracks device drivers will go public soon

This is the sort of fingerprint analysis you don't want to see used in your enterprise.

Jon Ellch, an independent researcher and graduate student, next month will release a Unix-based 802.11 "fingerprinting tool" that can be used to launch an attack via device drivers. (See Device Drivers at Risk.)

Ellch will make the software available after demonstrating exploits he created with it at the Black Hat and Defcon conferences in Las Vegas next month. Ellch and David Maynor, senior security researcher for SecureWorks, will give a presentation on device-driver vulnerabilities on August 2 at Black Hat.

The two researchers contend that hacking into a device driver isn't rocket science and that these exploits aren't limited to 802.11 WLANs, but can occur in wired LANs, too.

Knowing crucial details of a device driver, such as its version and chipset, is key to a successful attack. Ellch's fingerprinting tool grabs that information. "Knowing the driver is useful, but knowing the version is even more useful," says Ellch, whose research started out mainly on 802.11 WLAN devices. "If I know the version of the driver, I can tune my exploit so it's more reliable."

With the new tool, an attacker can remotely tell not only how many people in a room have Intel and Broadcom chipsets in their laptops, but what versions of the device-driver software they are running, Ellch says. "If you didn't know which version it was, you might own three or four of the ten people and could crash their systems. But [with the tool], you could [own] all ten instead."

Device drivers usually aren't secured and can run with the highest operating system privileges, making the new exploit potentially hazardous to enterprise IT health. But like any proof of concept, Ellch's research can potentially help the good guys, too.

Dino Dai Zovi, security researcher at Matasano Security and author of the Karma wireless security tool, envisions this fingerprinting feature as a way for enterprises to remotely track whether wireless devices are running up-to-date operating system and device driver programs. "These [device drivers] are not typically updated for security vulnerabilities," Dai Zovi says. "For example, wireless IDS vendors may use this to passively detect vulnerable devices and alert network administrators."

The new tool could also be used to scan wireless devices so that only patched and legit ones can access the network, he says.

Ellch has a similar vision for his invention. Fingerprinting could help an enterprise ensure that users logging on to their WLAN are using corporate-issue laptops, rather than their own. "If you took a fingerprint of a laptop and set up a WLAN to fingerprint it on the fly as you connect, it would filter out" unauthorized laptops, he says. But he admits a smart attacker could still spoof a legit laptop, so fingerprinting isn't foolproof.

Meanwhile, Ellch says he's polishing up his fingerprinting tool's user interface, which currently is "a little rough." He says he'll probably release the tool as part of his already available 802.11 suite of "cracker" tools. And he and Maynor are in the throes of devising some other exploits they'll demo at Black Hat. "We're just banging on some more bugs to see what we can get," he says.

— Kelly Jackson Higgins, Senior Editor, Dark Reading

  • Black Hat Inc.
  • SecureWorks Inc.

    Kelly Jackson Higgins is the Executive Editor of Dark Reading. 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

    Recommended Reading:

    Comment  | 
    Print  | 
    More Insights
  • Comments
    Newest First  |  Oldest First  |  Threaded View
    COVID-19: Latest Security News & Commentary
    Dark Reading Staff 7/13/2020
    Omdia Research Launches Page on Dark Reading
    Tim Wilson, Editor in Chief, Dark Reading 7/9/2020
    Russian Cyber Gang 'Cosmic Lynx' Focuses on Email Fraud
    Kelly Sheridan, Staff Editor, Dark Reading,  7/7/2020
    Register for Dark Reading Newsletters
    White Papers
    Current Issue
    Special Report: Computing's New Normal, a Dark Reading Perspective
    This special report examines how IT security organizations have adapted to the "new normal" of computing and what the long-term effects will be. Read it and get a unique set of perspectives on issues ranging from new threats & vulnerabilities as a result of remote working to how enterprise security strategy will be affected long term.
    Flash Poll
    The Threat from the Internetand What Your Organization Can Do About It
    The Threat from the Internetand What Your Organization Can Do About It
    This report describes some of the latest attacks and threats emanating from the Internet, as well as advice and tips on how your organization can mitigate those threats before they affect your business. Download it today!
    Twitter Feed
    Dark Reading - Bug Report
    Bug Report
    Enterprise Vulnerabilities
    From DHS/US-CERT's National Vulnerability Database
    PUBLISHED: 2020-07-13
    In Lib/tarfile.py in Python through 3.8.3, an attacker is able to craft a TAR archive leading to an infinite loop when opened by tarfile.open, because _proc_pax lacks header validation.
    PUBLISHED: 2020-07-13
    Affected versions of Atlassian Jira Server and Data Center allow remote attackers to view titles of a private project via an Insecure Direct Object References (IDOR) vulnerability in the Administration Permission Helper. The affected versions are before version 7.13.6, from version 8.0.0 before 8.5....
    PUBLISHED: 2020-07-13
    The login.jsp resource in Jira before version 8.5.2, and from version 8.6.0 before version 8.6.1 allows remote attackers to redirect users to a different website which they may use as part of performing a phishing attack via an open redirect in the os_destination parameter.
    PUBLISHED: 2020-07-13
    Affected versions of Atlassian Jira Server and Data Center allow remote attackers to access sensitive information without being authenticated in the Global permissions screen. The affected versions are before version 8.8.0.
    PUBLISHED: 2020-07-13
    The Gadget API in Atlassian Jira Server and Data Center in affected versions allows remote attackers to make Jira unresponsive via repeated requests to a certain endpoint in the Gadget API. The affected versions are before version 8.5.4, and from version 8.6.0 before 8.6.1.