Close
  • Latest News
  • 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
Logo
  • Latest News
  • 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
    Home Latest News
    • Blogs
    • Security Watch

    Linux Kernel Exploit Goes Public

    By
    Brian Prince
    -
    December 9, 2010
    Share
    Facebook
    Twitter
    Linkedin

      A security researcher has posted an exploit for the Linux on the Full Disclosure mailing list that utilizes three different bugs to permit an attacker to get root access.

      The exploit was posted by Dan Rosenberg, and affects Linux kernel version 2.6.37. The bugs he used were reported by researcher Nelson Elhage, and include two issues – CVE-2010-3849 and CVE-2010-3850 – that have already been patched by Ubuntu and Debian.

      “I wouldn’t be able to reach the NULL pointer dereference and trigger the OOPS if users weren’t able to assign Econet addresses to arbitrary interfaces due to a missing capabilities check,” Rosenberg wrote.

      “In the interest of public safety, this exploit was specifically designed to be limited: the particular symbols I resolve are not exported on Slackware or Debian (and) Red Hat does not support Econet by default,” he added.

      The third bug is CVE-2010-4258, which he wrote “affects everyone.”

      “If a thread is created via clone(2) using the CLONE_CHILD_CLEARTID flag, a NULL word will be written to a user-specified pointer when that thread exits,” he explained. “This write is done using put_user(), which ensures the provided destination resides in valid userspace by invoking access_ok(). However, Nelson discovered that when the kernel performs an address limit override via set_fs(KERNEL_DS) and the thread subsequently OOPSes (via BUG, page fault, etc.), this override is not reverted before calling put_user() in the exit path, allowing a user to write a NULL word to an arbitrary kernel address. Note that this issue requires an additional vulnerability to trigger.”

      Brian Prince

      MOST POPULAR ARTICLES

      Big Data and Analytics

      Alteryx’s Suresh Vittal on the Democratization of...

      James Maguire - May 31, 2022 0
      I spoke with Suresh Vittal, Chief Product Officer at Alteryx, about the industry mega-shift toward making data analytics tools accessible to a company’s complete...
      Read more
      Cybersecurity

      Visa’s Michael Jabbara on Cybersecurity and Digital...

      James Maguire - May 17, 2022 0
      I spoke with Michael Jabbara, VP and Global Head of Fraud Services at Visa, about the cybersecurity technology used to ensure the safe transfer...
      Read more
      Applications

      Cisco’s Thimaya Subaiya on Customer Experience in...

      James Maguire - May 10, 2022 0
      I spoke with Thimaya Subaiya, SVP and GM of Global Customer Experience at Cisco, about the factors that create good customer experience – and...
      Read more
      Cloud

      IGEL CEO Jed Ayres on Edge and...

      James Maguire - June 14, 2022 0
      I spoke with Jed Ayres, CEO of IGEL, about the endpoint sector, and an open source OS for the cloud; we also spoke about...
      Read more
      Big Data and Analytics

      GoodData CEO Roman Stanek on Business Intelligence...

      James Maguire - May 4, 2022 0
      I spoke with Roman Stanek, CEO of GoodData, about business intelligence, data as a service, and the frustration that many executives have with data...
      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.
      © 2022 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.

      ×