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Fill Your Boots: Enhanced Embedded Bootloader Exploits Via Fault Injection and Binary Analysis
IACR Transactions on Cryptographic Hardware and Embedded Systems ISSN 2569-2925, Vol. 2021, No. 1, pp. 56–81. DOI:10.46586/tches.v2021.i1.56-81 Fill your Boots: Enhanced Embedded Bootloader Exploits via Fault Injection and Binary Analysis Jan Van den Herrewegen1, David Oswald1, Flavio D. Garcia1 and Qais Temeiza2 1 School of Computer Science, University of Birmingham, UK, {jxv572,d.f.oswald,f.garcia}@cs.bham.ac.uk 2 Independent Researcher, [email protected] Abstract. The bootloader of an embedded microcontroller is responsible for guarding the device’s internal (flash) memory, enforcing read/write protection mechanisms. Fault injection techniques such as voltage or clock glitching have been proven successful in bypassing such protection for specific microcontrollers, but this often requires expensive equipment and/or exhaustive search of the fault parameters. When multiple glitches are required (e.g., when countermeasures are in place) this search becomes of exponential complexity and thus infeasible. Another challenge which makes embedded bootloaders notoriously hard to analyse is their lack of debugging capabilities. This paper proposes a grey-box approach that leverages binary analysis and advanced software exploitation techniques combined with voltage glitching to develop a powerful attack methodology against embedded bootloaders. We showcase our techniques with three real-world microcontrollers as case studies: 1) we combine static and on-chip dynamic analysis to enable a Return-Oriented Programming exploit on the bootloader of the NXP LPC microcontrollers; 2) we leverage on-chip dynamic analysis on the bootloader of the popular STM8 microcontrollers to constrain the glitch parameter search, achieving the first fully-documented multi-glitch attack on a real-world target; 3) we apply symbolic execution to precisely aim voltage glitches at target instructions based on the execution path in the bootloader of the Renesas 78K0 automotive microcontroller. -
Management of Virtual Offices Cheryl Donaldson Howard Walden University
Walden University ScholarWorks Walden Dissertations and Doctoral Studies Walden Dissertations and Doctoral Studies Collection 2019 Management of Virtual Offices Cheryl Donaldson Howard Walden University Follow this and additional works at: https://scholarworks.waldenu.edu/dissertations Part of the Business Administration, Management, and Operations Commons, and the Management Sciences and Quantitative Methods Commons This Dissertation is brought to you for free and open access by the Walden Dissertations and Doctoral Studies Collection at ScholarWorks. It has been accepted for inclusion in Walden Dissertations and Doctoral Studies by an authorized administrator of ScholarWorks. For more information, please contact [email protected]. Walden University College of Management and Technology This is to certify that the doctoral study by Cheryl Ann Donaldson Howard has been found to be complete and satisfactory in all respects, and that any and all revisions required by the review committee have been made. Review Committee Dr. Teresa Jepma, Committee Chairperson, Doctor of Business Administration Faculty Dr. Patsy Kasen, Committee Member, Doctor of Business Administration Faculty Dr. Peter Anthony, University Reviewer, Doctor of Business Administration Faculty Chief Academic Officer Eric Riedel, Ph.D. Walden University 2019 Abstract Management of Virtual Offices by Cheryl Ann Donaldson Howard MS, NOVA Southeastern University, 1999 BS, McKendree College 1996 Doctoral Study Submitted in Partial Fulfillment of the Requirements for the Degree of Doctor of Business Administration Walden University March 2019 Abstract Many organizational leaders manage virtual employees without the specific training and experience required for leading a virtual organization, which can lead to billions of dollars in lost productivity. The purpose of this multiple case study was to explore strategies managers used to manage a virtual office. -
Glitch Studies Manifesto
[email protected]. Amsterdam/Cologne, 2009/2010 http://rosa-menkman.blogspot.com The dominant, continuing search for a noiseless channel has been, and will always be no more than a regrettable, ill-fated dogma. Even though the constant search for complete transparency brings newer, ‘better’ media, every one of these new and improved techniques will always have their own fingerprints of imperfection. While most people experience these fingerprints as negative (and sometimes even as accidents) I emphasize the positive consequences of these imperfections by showing the new opportunities they facilitate. In the beginning there was only noise. Then the artist moved from the grain of celluloid to the magnetic distortion and scanning lines of the cathode ray tube. he wandered the planes of phosphor burn-in, rubbed away dead pixels and now makes performance art based on the cracking of LCD screens. The elitist discourse of the upgrade is a dogma widely pursued by the naive victims of a persistent upgrade culture. The consumer only has to dial #1-800 to stay on top of the technological curve, the waves of both euphoria and disappointment. It has become normal that in the future the consumer will pay less for a device that can do more. The user has to realize that improving is nothing more than a proprietary protocol, a deluded consumer myth about progression towards a holy grail of perfection. Dispute the operating templates of creative practice by fighting genres and expectations! I feel stuck in the membranes of knowledge, governed by social conventions and acceptances. As an artist I strive to reposition these membranes; I do not feel locked into one medium or between contradictions like real vs. -
Voip-Phone-Systems
Hosted or Premise-Based, Voice over IP systems are opportunities businesses should explore. Offers Big Advantages What is VoIP? Internet technology is affecting virtually every aspect of how businesses operate today. Perhaps First it is important to understand that there is VoIP none is impacted more than telecom. New Voice service and there are VoIP phone systems. Voice over IP (VoIP) capabilities are enabling companies over IP service, Voice over Interdinet Protocol and to communicate more effectively, economically and VoIP all refer to phone service delivered over the reliably. They are also providing the opportunity for Internet or a private IP network. Voice and unprecedented business flexibility and mobility. multimedia sessions can be transmitted by Both premise-based VoIP and hosted systems are digitization of the analog voice signal, encoding, dramatically improving how small and medium-size creating data packets and transmission as Internet businesses serve their customers, enable their Protocol (IP) packets over a packet-switched employees and achieve greater levels of success. network. The bandwidth efficiency and low costs that can be achieved with VoIP technology are an Premise-based Voice over IP phone systems can attractive incentive for many businesses to migrate provide large businesses with real cost savings and from traditional TDM to VoIP telephone service. other potential benefits of situating the equipment Today, the majority of new phone lines being within their facilities. Hosted (cloud-based) VOIP installed are VoIP. can offer other businesses a variety of advantages, from scalability, reliability and minimal capital A Voice over IP phone system is the equipment and investment to functionality, productivity and a software a business uses. -
A Practical Introduction to Python Programming
A Practical Introduction to Python Programming Brian Heinold Department of Mathematics and Computer Science Mount St. Mary’s University ii ©2012 Brian Heinold Licensed under a Creative Commons Attribution-Noncommercial-Share Alike 3.0 Unported Li- cense Contents I Basics1 1 Getting Started 3 1.1 Installing Python..............................................3 1.2 IDLE......................................................3 1.3 A first program...............................................4 1.4 Typing things in...............................................5 1.5 Getting input.................................................6 1.6 Printing....................................................6 1.7 Variables...................................................7 1.8 Exercises...................................................9 2 For loops 11 2.1 Examples................................................... 11 2.2 The loop variable.............................................. 13 2.3 The range function............................................ 13 2.4 A Trickier Example............................................. 14 2.5 Exercises................................................... 15 3 Numbers 19 3.1 Integers and Decimal Numbers.................................... 19 3.2 Math Operators............................................... 19 3.3 Order of operations............................................ 21 3.4 Random numbers............................................. 21 3.5 Math functions............................................... 21 3.6 Getting -
LIGO Detector Characterization Group Maintained by Josh Smith DCC# LIGO-G1500642 This Document: A
Glitch classes seen in aLIGO so far (through end of O1) LIGO Detector Characterization Group Maintained by Josh Smith DCC# LIGO-G1500642 This document: A. lists the major glitch classes that have been seen in aLIGO so far, B. shows a few representative images, C.says which detectors have which glitches, and D.provides links to alog pages and wikis for more information 2 Table of Contents 1. LHO/LLO Blip glitches [NF] 9. Blue Mountains [NF] 2. LLO RF Beats [NF] 10. LHO End-Y 60Hz glitches [F] 3. LLO Koi fish (working title) [NF] 11. Saturating tidal control [F] 4. LHO end-Y scattered light [NF] 12.OMC L Scattered light [F] 5. LLO SRM scattered light [NF] 13.Hartmann Wavefront sensor malfunction [F] 6. LHO paired doves [NF] 14. LHO PRCL/SRCL glitches [F] 7. DAC glitches [PF] 15. LHO End-Y 50Hz air compressor 8. n*505Hz glitches [PF] glitches [F] [NF] = not fixed, [PF]= partially fixed, [F]=fixed 3 1. Blip glitches H1 Examples: https://ldas-jobs.ligo-wa.caltech.edu/~areeda/blip-omega.tar 4 Blip glitches documentation • Brief description: Class of common glitches in both detectors, with no known cause currently. The only weak lead is that saturated hardware injections cause glitches that look very similar, so perhaps these are saturations in the actuation chain that happen under normal conditions. • Relevant alogs: • LLO: • LHO: saturated injections look like blips? • Other documentation: Some blip times and scans link 5 2. RF Beats Examples: https://ldas-jobs.ligo.caltech.edu/~areeda/josh-20150828.tgz 6 RF Beats documentation • Brief description: These are beats of two or more RF oscillators that sweep quickly through the audio range. -
Glitch.Com What Is Glitch?
glitch.com What is Glitch? “Everybody has good ideas of things we want to make on the Internet. But honestly, it’s gotten too hard. Gomix fixes that. If you’re not a professional developer, the barriers are way too high. There are pretty good tools if you just went to make a marketing website or a blog, but if your idea is an app or a bot or something more interactive, you’re out of luck. It ought to be as easy to make an app as it is to edit a blog post or to change a formula in a spreadsheet.” Anil Dash, December 6, 2016 https://medium.com/gomix/introducing-gomix-aec205c421cb#.fqutfey03 https://glitch.com/about/ Glitch handles the mess • While you work with Glitch, it will seamlessly upgrade your servers and cloud infrastructure in the background. • There’s no deployment or server provisioning because it all happens automatically. Backed by a real company Glitch • Glitch is made by Fog Creek, one of the most influential small tech companies in the world. • They made Trello, FogBugz and co-created Stack Overflow. Why did they make it In some ways, Glitch is a throwback to an older era of software or the internet, when there were simpler ways to get started making cool stuff. For people who were around at that time, they'll understand Glitch easily: It brings “View Source” back. The ability to just look at the code behind something, and tweak it, and make your own thing, was essential to making the Internet fun, and weird, and diverse, in its early days. -
It's Time to Get Serious About Developer Relations
03/04/2018 It’s time to get serious about Developer Relations – Glitch – Medium Images haven’t loaded yet. Please exit printing, wait for images to load, and try to Anil Dash Follow CEO of Fog Creek Software, makers pofri @nt Gagliatcinh. & Manuscript. Trying to make tech more ethical & humane. (Also an advisor to Medium.) More: http://anildash.com/ Sep 27, 2017 · 4 min read It’s time to get serious about Developer Relations Developer relations is a vital part of modern business strategy, but so much of the industry still treats it like an afterthought. Glitch for Platforms is here to help everyone who does Dev Rel. If you do developer relations or evangelism, you’re probably great at your job. You’re talking to coders, getting out in the community, building relationships. But does the rest of your organization value that work as much as they should? A lot of smart people are thinking it’s time for Dev Rel to grow up, and we agree. All of us who give a damn about developer relations need to get a lot louder and more aggressive about the business value of what we do. And that means tackling the ROI question head-on: Can you really show that your developer outreach is working? Jonathan Gottfried @jonmarkgo Replying to @bwest it feels counterintuitive to spend time proving ROI to execs rather than generating value for developers but Jonathan Gottfried, Co-Founder of Major League Hacking Dev Rel’s Burden of Proof For a lot of Dev Rel people, really proving a return on investment is, well, a pain in the ass. -
Making Web Apps with Node - Paths Into Programming - Top Tips for New Coders V1.0 Glitch Is the Friendly Community Where You'll Build the App of Your Dreams
In this issue: CC BY-NC-SA 4.0 Print & Share! - Making Web Apps with Node - Paths into Programming - Top Tips for New Coders v1.0 Glitch is the friendly community where you'll build the app of your dreams. With working example apps to remix, a code editor to modify them, instant hosting and deployment - anybody can build a web app on Glitch, for free. Learn more at glitch.com Credits Illustration: Good Boy Graphics Layout: Gareth Wilson Content: Jenn Schiffer, Gareth Wilson Edited by: Maurice Cherry Guest Contributors: Cassidy Williams, Saron Yitbarek, Steve Klabnik Contents p2. How Web Servers Work Paths into Programming: p4. Cassidy Williams p10. Saron Yitbarek p14. Steve Klabnik p6. Anatomy of a Web App p9. Expert Advice for New Developers p12. What is npm Exactly? p19. Top Tips for New Coders p16. Understanding Async in Node 1 How Web Servers Work What happens when you enter a URL into your browser? It turns out, a whole bunch of things happen. But one of them is you sending a request to a server (which is just a computer) somewhere, asking it to give you the app or site that relates to that URL. You can think of a computer server as being a bit like a server in a restaurant - you request something and they should return with what you requested. At a diner, for example, if you ask them for food, they eventually return with that food. 2 So when you’re surfin' the web, and you go to example.com, or click a link, you’re asking a server to send you a web page. -
The End of Documentation
The End of Documentation A Better Way for Developers and Engineers to Preserve and Share Knowledge Introduction When software developers are trying to share knowledge within their organization, there are two principle methods most teams fall back on: documentation and conversation. Conversation can happen face to face, over email, or in chat apps. Documentation takes the form of notes left in the code, lengthy written records and company wikis. Both of these approaches, however, have serious drawbacks. In our latest developer survey, which collected answers from over 90,000 active programmers, respondents felt the greatest challenge to productivity was a distracting work environment. Developers are seeking solid chunks of time in which they can dive deep into focused work, ideally finding their way to a flow state. And as academic research on the daily lives of programmers over the last two decades has shown, the most common breaks from writing code are for meeting with colleagues, reviewing documentation and answering instant messages. Greatest challenges to productivity 68,141 responses Stack Overflow Developer Survey 2019 2 Check the receipts Expensify is an example of what these problems look like in the real world At Expensify, a fast growing Silicon Valley startup focused on simplifying the process of collecting receipts and filing for reimbursements, both of these pain points were present. To help onboard new hires, the team created a wealth of documentation, but it wasn’t easily accessible. “Our documentation at Expensify has been…fairly terrible in the past,” said software engineer John Lee. “People would rather talk to someone with more knowledge than to go search through all these pages of documentation we wrote.” Expensify prides itself on being a flat organization. -
Download Teacher Guide
Web Development Course vidcode.com Web Development Course Project 1: Personal Website Project: https://my-personal-site-example.glitch.me/ Code: https://glitch.com/edit/#!/my-personal-site-example?path=index.html%3A34%3A9 Big Idea: Students can be creative and express themselves online with HTML and CSS In this first project, students will get set up and familiar with making websites using the Glitch platform, and make their first website that reflects them and their interests. This course serves as either an off-ramp from Vidcode’s JavaScript courses into traditional web development, or as a standalone course to teach your students how to make personalized, interactive websites. Your students will be introduced to creating websites with HTML, CSS, and JavaScript. Time: 35-45 minutes 5-10 minutes Getting set up on Glitch 5 minutes Intro to HTML 20-25 minutes Personal Websites project 5 minutes Discussion and Sharing Web Development Course vidcode.com Background Introducing HTML HTML stands for Hyper Text Markup Language. It is the standard markup language for web pages, which means that it allows the user to create and structure web pages. Webpages are broken up into HTML, CSS, and JavaScript. ● HTML is the content of the site. The text and images on a site are organized in HTML tags. ● CSS styles sites, and customizes the HTML of the site with fonts, background-colors, placing elements, just to name a few. ● JavaScript adds interaction to sites. If you open a menu, or play a game online, JavaScript is probably behind it! Teacher Reference: More on HTML Personal Site Example project: https://my-personal-site-example.glitch.me/ Code: https://glitch.com/edit/#!/my-personal-site-example?path=index.html%3A34%3A9 Web Development Course vidcode.com Project Checklist for Students Each project should include: ● At least one header tag ● A paragraph tag ● A list with 3 elements ● At least one picture ● All elements above styled with CSS Start Here: Get Set up on Glitch Students will be moving off of Vidcode in this lesson. -
Borderless Networks Architecture: Connect Anyone, Anywhere, on Any Device
White Paper Borderless Networks Architecture: Connect Anyone, Anywhere, on Any Device What You Will Learn The business of government extends beyond physical walls, and so should government networks. IT teams need a new network architecture to securely deliver voice, video, and data services to employees and citizens anywhere, on any device. This white paper, intended for government network architects, provides a high-level overview of the Cisco® Borderless Networks architecture, focusing on how it supports top government priorities: ● Increasing operational efficiency, to minimize total cost of ownership and increase agility ● Allowing secure access by different government users and citizens while guarding against network damage and unauthorized information disclosure ● Empowering a mobile workforce to access government services from the field, with performance comparable to the experience at headquarters ● Enabling collaboration within and between government agencies and with citizens, from anywhere and with any device ● Supporting virtual desktops that employees can access from anywhere The Disappearance of Traditional Network Borders Until recently, very clear borders surrounded government networks. The network extended only as far as the building walls; provided access only to government employees on office PCs or phones; and delivered voice, video, or data, not a combination of services. Changes in workforce behavior, citizen expectations, and technology have impelled government to break down the traditional borders: ● The world has become the workplace: Employees increasingly work in the field, at home, in the car, and in airports. ● Citizens expect self-service applications: Citizens want the convenience of online tax filing, business license applications, and eligibility determination. Shifting citizen interactions to online channels when feasible also reduces government costs.