{"id":35197,"date":"2020-05-27T11:23:00","date_gmt":"2020-05-27T11:23:00","guid":{"rendered":"http:\/\/34517b32-db3f-4d2a-ac66-c31aae5a3969"},"modified":"2020-05-27T11:23:00","modified_gmt":"2020-05-27T11:23:00","slug":"new-fuzzing-tool-finds-26-usb-bugs-in-linux-windows-macos-and-freebsd","status":"publish","type":"post","link":"https:\/\/www.threatshub.org\/blog\/new-fuzzing-tool-finds-26-usb-bugs-in-linux-windows-macos-and-freebsd\/","title":{"rendered":"New fuzzing tool finds 26 USB bugs in Linux, Windows, macOS, and FreeBSD"},"content":{"rendered":"<p><span class=\"img aspect-set\"><img decoding=\"async\" src=\"https:\/\/zdnet4.cbsistatic.com\/hub\/i\/2020\/05\/27\/49fd5737-1eab-48a4-b8b5-091340019d03\/usb-drive.jpg\" class alt=\"USB thumb drive\"><\/span><span class=\"credit\">Image: Sara Kurfe\u00df<\/span> <\/p>\n<p>Academics say they discovered 26 new vulnerabilities in the USB driver stack employed by operating systems such as Linux, macOs, Windows, and FreeBSD.<\/p>\n<p>The research team, made up by Hui Peng from Purdue University and Mathias Payer from the Swiss Federal Institute of Technology Lausanne, said all the bugs were discovered with a new tool they created, named <strong>USBFuzz<\/strong>.<\/p>\n<p>The tool is what security experts call a <a href=\"https:\/\/en.wikipedia.org\/wiki\/Fuzzing\" target=\"_blank\" rel=\"noopener noreferrer\" data-component=\"externalLink\">fuzzer<\/a>. Fuzzers are applications that let security researchers send large quantities of invalid, unexpected, or random data as inputs to other programs.<\/p>\n<p>Security researchers then analyze how the tested software behaves to discover new bugs, some of which may be exploited in a malicious way.<\/p>\n<h3>Academics developed a new portable USB fuzzer<\/h3>\n<p>To test USB drivers, Peng and Payer developed USBFuzz, a new fuzzer specifically designed to test the USB driver stack of modern-day operating systems.<\/p>\n<p>&#8220;At its core, USBFuzz uses a software-emulated USB device to provide random device data to drivers (when they perform IO operations),&#8221; the researchers said.<\/p>\n<p>&#8220;As the emulated USB device works at the device level, porting it to other platforms is straight-forward.&#8221;<\/p>\n<section class=\"sharethrough-top\" data-component=\"medusaContentRecommendation\" data-medusa-content-recommendation-options=\"{&quot;promo&quot;:&quot;promo_zd_recommendation_sharethrough_top_in_article_desktop&quot;,&quot;spot&quot;:&quot;dfp-in-article&quot;}\">\n<\/section>\n<p>This allowed the research team to test USBFuzz not only on Linux, where most fuzzer programs work, but also other operating systems. Researchers said they tested USBFuzz on:<\/p>\n<ul>\n<li>9 recent versions of the Linux kernel: v4.14.81, v4.15,v4.16, v4.17, v4.18.19, v4.19, v4.19.1, v4.19.2, and v4.20-rc2 (the latest version at the time of evaluation)<\/li>\n<li>FreeBSD 12 (the latest release)<\/li>\n<li>MacOS 10.15 Catalina (the latest release)<\/li>\n<li>Windows (both version 8 and 10, with most recent security updates installed)<\/li>\n<\/ul>\n<h3>Research team finds 26 new bugs<\/h3>\n<p>Following their tests, the research team said that with the help of USBFuzz, they discovered a total of 26 new bugs.<\/p>\n<p>Researchers found one bug in FreeBSD, three in MacOS (two resulting in an unplanned reboot and one freezing the system), and four in Windows 8 and Windows 10 (resulting in Blue Screens of Death).<\/p>\n<p>However, the vast majority of bugs, and the most severe, were found in Linux &#8212; 18 in total.<\/p>\n<p>Sixteen were memory bugs of high-security impact in various Linux subsystems (USB core, USB sound, and net-work), one bug resided in the Linux USB host controller driver, and the last in a USB camera driver.<\/p>\n<p>Peng and Payer said they reported these bugs to the Linux kernel team, along with proposed patches to reduce &#8220;the burden on the kernel developers when fixing the reported vulnerabilities.&#8221;<\/p>\n<p>Of the 18 Linux bugs, the research team said 11 received a patch since their initial reports last year. Ten of these 11 bugs also received a CVE, a unique code that&#8217;s assigned to major security flaws.<\/p>\n<p><span class=\"img aspect-set\"><img decoding=\"async\" src=\"https:\/\/www.zdnet.com\/article\/new-fuzzing-tool-finds-26-usb-bugs-in-linux-windows-macos-and-freebsd\/\" class=\"lazy\" alt=\"usbfuzz-tests.png\" data-original=\"https:\/\/zdnet1.cbsistatic.com\/hub\/i\/2020\/05\/27\/1ab453cb-f76e-461f-accf-2965becb34c5\/usbfuzz-tests.png\"><\/span><noscript><\/p>\n<p><span class=\"img aspect-set\"><img decoding=\"async\" src=\"https:\/\/zdnet1.cbsistatic.com\/hub\/i\/2020\/05\/27\/1ab453cb-f76e-461f-accf-2965becb34c5\/usbfuzz-tests.png\" class alt=\"usbfuzz-tests.png\"><\/span><\/p>\n<p><\/noscript> <span class=\"credit\">Image: Peng et al.<\/span><\/p>\n<p>Other patches are also expected in the near future for the seven remaining issues.<\/p>\n<p>&#8220;The remaining bugs fall into two classes: those still under embargo\/being disclosed and those that were concurrently found and reported by other researchers,&#8221; researchers said.<\/p>\n<h3>USBFuzz to be open-sourced<\/h3>\n<p>Payer published yesterday a draft of the research team&#8217;s white paper describing their work on USBFuzz. Peng and Payer plan to present their research at the Usenix Security Symposium virtual security conference, scheduled for August 2020.<\/p>\n<p>Similar work has been carried out in the past. A Google security engineer used a Google-made fuzzer named syzkaller to discover <a href=\"https:\/\/github.com\/google\/syzkaller\/blob\/master\/docs\/linux\/found_bugs_usb.md\" target=\"_blank\" rel=\"noopener noreferrer nofollow\" data-component=\"externalLink\">79 bugs impacting Linux kernel USB drivers<\/a> in November 2017.<\/p>\n<p>Peng and Payer said that USBFuzz is superior to previous tools like vUSBf, syzkaller, and usb-fuzzer because their tool grants testers more control over the test data and is also portable across operating systems, unlike all the above, which usually work only on *NIX systems.<\/p>\n<p>USBFuzz is scheduled to be released on GitHub as an open source project following Peng and Payer&#8217;s Usenix talk. The repo will be available <a href=\"https:\/\/github.com\/HexHive\/USBFuzz\" target=\"_blank\" rel=\"noopener noreferrer nofollow\" data-component=\"externalLink\">here<\/a>.<\/p>\n<p>Copies of Peng and Payer&#8217;s paper, titled &#8220;<em>USBFuzz: A Framework for Fuzzing USB Drivers by Device Emulation<\/em>,&#8221; are available in PDF format <a href=\"http:\/\/hexhive.epfl.ch\/publications\/files\/20SEC3.pdf\" target=\"_blank\" rel=\"noopener noreferrer nofollow\" data-component=\"externalLink\">here<\/a> and <a href=\"https:\/\/nebelwelt.net\/publications\/files\/20SEC3.pdf\" target=\"_blank\" rel=\"noopener noreferrer nofollow\" data-component=\"externalLink\">here<\/a>.<\/p>\n<p> READ MORE <a href=\"https:\/\/www.zdnet.com\/article\/new-fuzzing-tool-finds-26-usb-bugs-in-linux-windows-macos-and-freebsd\/#ftag=RSSbaffb68\">HERE<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Eighteen of the 26 bugs impact Linux. Eleven have been patched already.<br \/>\nREAD MORE HERE&#8230;<\/p>\n","protected":false},"author":2,"featured_media":35198,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"colormag_page_layout":"default_layout","footnotes":""},"categories":[62],"tags":[],"class_list":["post-35197","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-zdnet-security"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>New fuzzing tool finds 26 USB bugs in Linux, Windows, macOS, and FreeBSD 2026 | ThreatsHub Cybersecurity News<\/title>\n<meta name=\"description\" content=\"ThreatsHub Cybersecurity News | ThreatsHub.org | Cloud Security &amp; Cyber Threats Analysis Hub. 100% Free OSINT Threat Intelligent and Cybersecurity News.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, 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