Close
  • Latest News
  • Artificial Intelligence
  • Video
  • Big Data and Analytics
  • Cloud
  • Networking
  • Cybersecurity
  • Applications
  • IT Management
  • Storage
  • Sponsored
  • Mobile
  • Small Business
  • Development
  • Database
  • Servers
  • Android
  • Apple
  • Innovation
  • Blogs
  • PC Hardware
  • Reviews
  • Search Engines
  • Virtualization
Read Down
Sign in
Close
Welcome!Log into your account
Forgot your password?
Read Down
Password recovery
Recover your password
Close
Search
Logo
Subscribe
Logo
  • Latest News
  • Artificial Intelligence
  • Video
  • Big Data and Analytics
  • Cloud
  • Networking
  • Cybersecurity
  • Applications
  • IT Management
  • Storage
  • Sponsored
  • Mobile
  • Small Business
  • Development
  • Database
  • Servers
  • Android
  • Apple
  • Innovation
  • Blogs
  • PC Hardware
  • Reviews
  • Search Engines
  • Virtualization
More
    Subscribe
    Home Cybersecurity
    • Cybersecurity

    Researchers Reveal Critical KRACK Flaws in WPA WiFi Security

    Written by

    Sean Michael Kerner
    Published October 16, 2017
    Share
    Facebook
    Twitter
    Linkedin

      eWEEK content and product recommendations are editorially independent. We may make money when you click on links to our partners. Learn More.

      The WPA2 protocol that is widely used to secure WiFi traffic is at risk from multiple vulnerabilities, collectively referred to as “KRACK Attacks,” which were publicly disclosed on Oct. 16.

      “Attackers can use this novel attack technique to read information that was previously assumed to be safely encrypted,” the vulnerability disclosure warns. “The attack works against all modern protected Wi-Fi networks.” 

      KRACK is an acronym for Key Reinstallation Attacks, which were discovered by security researchers Mathy Vanhoef and Frank Piessens working at Belgian University KU Leuven. The researchers have disclosed the details of the KRACK attack in a research paper and plan on discussing it further in talks at the Computer and Communications Security (CCS) and Black Hat Europe conferences later this year.

      In total, the KRACK attacks include 10 vulnerabilities: CVE-2017-13077, CVE-2017-13078, CVE-2017-13079, CVE-2017-13080, CVE-2017-13081, CVE-2017-13082, CVE-2017-13084, CVE-2017-13086, CVE-2017-13087 and CVE-2017-13088. The different CVEs refer to variations of the key reinstallation attack that impact WPA2. 

      The KRACK vulnerabilities define new approaches to exploit the way that WPA2 generates a session encryption key. The researchers note that all WPA2-protected WiFi networks use the four-way handshake to generate a fresh session key. 

      “So far, this 14-year-old handshake has remained free from attacks, and is even proven secure,” the research abstract states. “However, we show that the 4-way handshake is vulnerable to a key reinstallation attack.”

      The reinstallation attack is a form of replay attack, where an attacker tricks a victim into reinstalling an already-in-use key. KRACK attacks work by manipulating and replaying handshake messages, the researchers said. Of note, they said the KRACK attack methods do not actually reveal the password of a WPA2-protected WiFi network. In addition, the attacks do not recover any parts of a fresh encryption key that is negotiated during the four-way handshake.

      Impact

      The potential impact of the KRACK vulnerabilities is large and could well involve all users of WP2-protected WiFi.

      “The weaknesses are in the Wi-Fi standard itself, and not in individual products or implementations,” Vanhoef wrote. “Therefore, any correct implementation of WPA2 is likely affected.” 

      At this point, Vanhoef said there is no indication that the KRACK vulnerabilities have been exploited in the wild by an attacker, though he cautions that it is possible.

      “We are not in a position to determine if this vulnerability has been (or is being) actively exploited in the wild,” Vanhoef wrote. “That said, key reinstallations can actually occur spontaneously without an adversary being present! This may for example happen if the last message of a handshake is lost due to background noise, causing a retransmission of the previous message.” 

      According to Vanhoef, Android, Linux, Apple, Windows, OpenBSD, MediaTek, Linksys and many other vendors are affected by some variant of the KRACK attacks. Vanhoef worked with CERT/CC to conduct a coordinated private disclosure that was sent out to impacted vendors on Aug. 28. Multiple vendors have already issued patches to fix the issues, including Aruba, Cisco, Red Hat, Juniper Networks, ZyXEL, Samsung and Intel.

      “Changing the password of your WiFi network does not prevent (or mitigate) the attack,” Vanhoef wrote. “Instead, you should make sure all your devices are updated, and you should also update the firmware of your router.”

      Sean Michael Kerner is a senior editor at eWEEK and InternetNews.com. Follow him on Twitter @TechJournalist.

      Sean Michael Kerner
      Sean Michael Kerner
      Sean Michael Kerner is an Internet consultant, strategist, and writer for several leading IT business web sites.

      Get the Free Newsletter!

      Subscribe to Daily Tech Insider for top news, trends & analysis

      Get the Free Newsletter!

      Subscribe to Daily Tech Insider for top news, trends & analysis

      MOST POPULAR ARTICLES

      Artificial Intelligence

      9 Best AI 3D Generators You Need...

      Sam Rinko - June 25, 2024 0
      AI 3D Generators are powerful tools for many different industries. Discover the best AI 3D Generators, and learn which is best for your specific use case.
      Read more
      Cloud

      RingCentral Expands Its Collaboration Platform

      Zeus Kerravala - November 22, 2023 0
      RingCentral adds AI-enabled contact center and hybrid event products to its suite of collaboration services.
      Read more
      Artificial Intelligence

      8 Best AI Data Analytics Software &...

      Aminu Abdullahi - January 18, 2024 0
      Learn the top AI data analytics software to use. Compare AI data analytics solutions & features to make the best choice for your business.
      Read more
      Latest News

      Zeus Kerravala on Networking: Multicloud, 5G, and...

      James Maguire - December 16, 2022 0
      I spoke with Zeus Kerravala, industry analyst at ZK Research, about the rapid changes in enterprise networking, as tech advances and digital transformation prompt...
      Read more
      Video

      Datadog President Amit Agarwal on Trends in...

      James Maguire - November 11, 2022 0
      I spoke with Amit Agarwal, President of Datadog, about infrastructure observability, from current trends to key challenges to the future of this rapidly growing...
      Read more
      Logo

      eWeek has the latest technology news and analysis, buying guides, and product reviews for IT professionals and technology buyers. The site’s focus is on innovative solutions and covering in-depth technical content. eWeek stays on the cutting edge of technology news and IT trends through interviews and expert analysis. Gain insight from top innovators and thought leaders in the fields of IT, business, enterprise software, startups, and more.

      Facebook
      Linkedin
      RSS
      Twitter
      Youtube

      Advertisers

      Advertise with TechnologyAdvice on eWeek and our other IT-focused platforms.

      Advertise with Us

      Menu

      • About eWeek
      • Subscribe to our Newsletter
      • Latest News

      Our Brands

      • Privacy Policy
      • Terms
      • About
      • Contact
      • Advertise
      • Sitemap
      • California – Do Not Sell My Information

      Property of TechnologyAdvice.
      © 2024 TechnologyAdvice. All Rights Reserved

      Advertiser Disclosure: Some of the products that appear on this site are from companies from which TechnologyAdvice receives compensation. This compensation may impact how and where products appear on this site including, for example, the order in which they appear. TechnologyAdvice does not include all companies or all types of products available in the marketplace.