In this talk we will publish our research we conducted on 28 different AntiVirus products on macOS through 2020. Our focus was to assess the XPC services these products expose and if they presented any security vulnerabilities. We will talk about the typical issues, and demonstrate plenty of vulnerabilities, which typically led to full control of the given product or local privilege escalation on the system. At the end we will give advice to developers how to write secure XPC services.
This document discusses C++11/14 enhancements including data types, literals, attributes, loops, constants, enumerations, typedefs, pointers, smart pointers, references, type inference, functions, and lambda expressions. It provides examples and explanations of new features in each category.
About the author: Priya Autee is software engineer at Intel working on various leading edge IA features and Intel(R) RDT expert. She is focused on prototyping and researching open source APIs like DPDK, Intel(R) RDT etc. to support NFV/compute sensitive requirements on Intel Architecture. She holds Masters in Computer Science from Arizona State University, Arizona.
LAS16-403: GDB Linux Kernel Awareness
Speakers: Peter Griffin
Date: September 29, 2016
★ Session Description ★
The presentation will look at the ways in which GDB can be enhanced when debugging the Linux kernel to give it better knowledge of the underlying operating system to enable a better debugging experience. It will also provide a status of the current work being undertaken in this area by the ST landing team, a demo and potential future work.
★ Resources ★
Etherpad: pad.linaro.org/p/las16-403
Presentations & Videos: http://connect.linaro.org/resource/las16/las16-403/
★ Event Details ★
Linaro Connect Las Vegas 2016 – #LAS16
September 26-30, 2016
http://www.linaro.org
http://connect.linaro.org
In this talk we will publish our research we conducted on 28 different AntiVirus products on macOS through 2020. Our focus was to assess the XPC services these products expose and if they presented any security vulnerabilities. We will talk about the typical issues, and demonstrate plenty of vulnerabilities, which typically led to full control of the given product or local privilege escalation on the system. At the end we will give advice to developers how to write secure XPC services.
This document discusses C++11/14 enhancements including data types, literals, attributes, loops, constants, enumerations, typedefs, pointers, smart pointers, references, type inference, functions, and lambda expressions. It provides examples and explanations of new features in each category.
About the author: Priya Autee is software engineer at Intel working on various leading edge IA features and Intel(R) RDT expert. She is focused on prototyping and researching open source APIs like DPDK, Intel(R) RDT etc. to support NFV/compute sensitive requirements on Intel Architecture. She holds Masters in Computer Science from Arizona State University, Arizona.
LAS16-403: GDB Linux Kernel Awareness
Speakers: Peter Griffin
Date: September 29, 2016
★ Session Description ★
The presentation will look at the ways in which GDB can be enhanced when debugging the Linux kernel to give it better knowledge of the underlying operating system to enable a better debugging experience. It will also provide a status of the current work being undertaken in this area by the ST landing team, a demo and potential future work.
★ Resources ★
Etherpad: pad.linaro.org/p/las16-403
Presentations & Videos: http://connect.linaro.org/resource/las16/las16-403/
★ Event Details ★
Linaro Connect Las Vegas 2016 – #LAS16
September 26-30, 2016
http://www.linaro.org
http://connect.linaro.org
The document summarizes the steps taken to analyze and exploit a DEFCON CTF binary file called "annyong". It describes using various Linux commands like file, strings, hexdump, readelf, and checksec to gather information about the binary. The analysis revealed the binary is position independent and has NX, PIE, and partial RELRO protections. The exploit uses return oriented programming (ROP) to execute a system call and spawn an interactive shell, bypassing protections by overwriting return addresses on the stack.
eBPF is an exciting new technology that is poised to transform Linux performance engineering. eBPF enables users to dynamically and programatically trace any kernel or user space code path, safely and efficiently. However, understanding eBPF is not so simple. The goal of this talk is to give audiences a fundamental understanding of eBPF, how it interconnects existing Linux tracing technologies, and provides a powerful aplatform to solve any Linux performance problem.
The document describes the GCC Link Time Optimization (LTO) compilation process. It shows how GCC and the linker communicate via a transfer vector in the liblto_plugin.so library. GCC generates LTO objects and passes symbol information to the linker. The lto-wrapper driver then performs the LTO and code generation steps, outputting new object files for the linker to incorporate into the final executable.
The document discusses the construction of the Linux kernel image. It describes how the kernel code is organized and hardware-independent. It then explains the process of building the composite kernel image (vmlinux) by linking object files together. This involves using the linker to combine files like head.o, piggy.o and misc.o into a binary image. It also discusses the roles of the bootstrap loader and how it loads and decompresses the kernel image.
This document discusses Veriloggen, a Python framework for generating Verilog HDL code from Python. It allows designing hardware at the register-transfer level using Python by mapping Python constructs to Verilog modules, always blocks, wires, and other Verilog constructs. Veriloggen includes modules for RTL generation (Core), connecting Python threads to finite state machines (Thread), and defining streaming hardware (Stream). It aims to support a "Veriloggen for DSL X" approach to create domain-specific hardware description languages in Python.
Conduct a few internal pen tests and you’re bound to come across Jenkins, the world’s most popular build automation server. When you encounter it, what do you do? Go beyond a 5-minute Google search and checking for open script consoles. This talk dives into various ways to exploit Jenkins and how to move laterally into sensitive systems.
The presentation deals with the range of features of the Linux sound subsystem — Advanced Linux Sound Architecture (ALSA). During the presentation, the participants were provided with case studies of the difference it makes for the development of audio drivers for PC and embedded systems. Also, it was
shared an overview of the state-of-the-art tendencies in the development of audio drivers for embedded systems.
This presentation by Vadym Shovkoplias (Senior Software Engineer, GlobalLogic Kharkiv) was delivered at GlobalLogic Kharkiv Embedded TechTalk #1 on March 13, 2018.
Understanding a kernel oops and a kernel panicJoseph Lu
This document discusses Linux kernel oops and kernel panics. It explains that a kernel oops occurs when there is an illegal instruction or illegal memory access in kernel space, and will kill the offending process to keep the system running. A kernel panic means the system must stop immediately. Kernel oops can be caused by illegal instructions, unrecognized system calls, undefined CPU instructions, unknown data aborts, or prefetch aborts. These result in a call to the arm_notify_die() function and generate an oops. Illegal instructions that handle interrupt vectors can cause a panic directly. A kernel panic performs further actions like console output and stopping other CPUs before restarting or halting the system. Methods to capture crash
This document summarizes a presentation on analyzing the security of smart locks. It defines IoT and describes the target smart lock device. It details analyzing the device components and chipset, reverse engineering the mobile app, intercepting BLE communications, and finding vulnerabilities in the API and BLE authentication that allow exploiting the lock. Solutions proposed include updating firmware to add BLE crypto and adding authentication to the API backend.
CTF for ビギナーズのバイナリ講習で使用した資料です。
講習に使用したファイルは、以下のリンク先にあります。
https://onedrive.live.com/redir?resid=5EC2715BAF0C5F2B!10056&authkey=!ANE0wqC_trouhy0&ithint=folder%2czip
Veriloggen is a Python library that allows users to generate RTL from Python code for FPGA implementation. It supports threads to model hardware tasks, streams to connect hardware components, and intrinsic functions that map to RTL. The library can synthesize Python code into Verilog for FPGA synthesis and implementation, providing an easier high-level approach to developing FPGA hardware compared to writing RTL directly in Verilog.
[TGDF 2019] Mali GPU Architecture and Mobile StudioOwen Wu
This document provides an overview of Arm's Mobile Studio tools for optimizing graphics and application performance. It describes the GPU architecture of Mali GPUs and concepts like tile-based rendering and render passes. It then introduces the tools in Mobile Studio - Streamline for profiling, Graphics Analyzer for debugging graphics, the Offline Shader Compiler, and Performance Advisor (currently in beta).
A deep dive into energy efficient multi core processorZongYing Lyu
This document discusses techniques for improving energy efficiency in multi-core processors. It describes how the operating system can schedule cores to enter idle states like C1, C2, or C3 to reduce power when not in use. These idle states turn off different components gradually to balance power savings and transition speed. The document also explains how Intel Core 2 Duo processors manage power at the core and shared resource levels, and how cache sizes can be dynamically adjusted based on core activity to optimize performance and power usage.
The document summarizes the steps taken to analyze and exploit a DEFCON CTF binary file called "annyong". It describes using various Linux commands like file, strings, hexdump, readelf, and checksec to gather information about the binary. The analysis revealed the binary is position independent and has NX, PIE, and partial RELRO protections. The exploit uses return oriented programming (ROP) to execute a system call and spawn an interactive shell, bypassing protections by overwriting return addresses on the stack.
eBPF is an exciting new technology that is poised to transform Linux performance engineering. eBPF enables users to dynamically and programatically trace any kernel or user space code path, safely and efficiently. However, understanding eBPF is not so simple. The goal of this talk is to give audiences a fundamental understanding of eBPF, how it interconnects existing Linux tracing technologies, and provides a powerful aplatform to solve any Linux performance problem.
The document describes the GCC Link Time Optimization (LTO) compilation process. It shows how GCC and the linker communicate via a transfer vector in the liblto_plugin.so library. GCC generates LTO objects and passes symbol information to the linker. The lto-wrapper driver then performs the LTO and code generation steps, outputting new object files for the linker to incorporate into the final executable.
The document discusses the construction of the Linux kernel image. It describes how the kernel code is organized and hardware-independent. It then explains the process of building the composite kernel image (vmlinux) by linking object files together. This involves using the linker to combine files like head.o, piggy.o and misc.o into a binary image. It also discusses the roles of the bootstrap loader and how it loads and decompresses the kernel image.
This document discusses Veriloggen, a Python framework for generating Verilog HDL code from Python. It allows designing hardware at the register-transfer level using Python by mapping Python constructs to Verilog modules, always blocks, wires, and other Verilog constructs. Veriloggen includes modules for RTL generation (Core), connecting Python threads to finite state machines (Thread), and defining streaming hardware (Stream). It aims to support a "Veriloggen for DSL X" approach to create domain-specific hardware description languages in Python.
Conduct a few internal pen tests and you’re bound to come across Jenkins, the world’s most popular build automation server. When you encounter it, what do you do? Go beyond a 5-minute Google search and checking for open script consoles. This talk dives into various ways to exploit Jenkins and how to move laterally into sensitive systems.
The presentation deals with the range of features of the Linux sound subsystem — Advanced Linux Sound Architecture (ALSA). During the presentation, the participants were provided with case studies of the difference it makes for the development of audio drivers for PC and embedded systems. Also, it was
shared an overview of the state-of-the-art tendencies in the development of audio drivers for embedded systems.
This presentation by Vadym Shovkoplias (Senior Software Engineer, GlobalLogic Kharkiv) was delivered at GlobalLogic Kharkiv Embedded TechTalk #1 on March 13, 2018.
Understanding a kernel oops and a kernel panicJoseph Lu
This document discusses Linux kernel oops and kernel panics. It explains that a kernel oops occurs when there is an illegal instruction or illegal memory access in kernel space, and will kill the offending process to keep the system running. A kernel panic means the system must stop immediately. Kernel oops can be caused by illegal instructions, unrecognized system calls, undefined CPU instructions, unknown data aborts, or prefetch aborts. These result in a call to the arm_notify_die() function and generate an oops. Illegal instructions that handle interrupt vectors can cause a panic directly. A kernel panic performs further actions like console output and stopping other CPUs before restarting or halting the system. Methods to capture crash
This document summarizes a presentation on analyzing the security of smart locks. It defines IoT and describes the target smart lock device. It details analyzing the device components and chipset, reverse engineering the mobile app, intercepting BLE communications, and finding vulnerabilities in the API and BLE authentication that allow exploiting the lock. Solutions proposed include updating firmware to add BLE crypto and adding authentication to the API backend.
CTF for ビギナーズのバイナリ講習で使用した資料です。
講習に使用したファイルは、以下のリンク先にあります。
https://onedrive.live.com/redir?resid=5EC2715BAF0C5F2B!10056&authkey=!ANE0wqC_trouhy0&ithint=folder%2czip
Veriloggen is a Python library that allows users to generate RTL from Python code for FPGA implementation. It supports threads to model hardware tasks, streams to connect hardware components, and intrinsic functions that map to RTL. The library can synthesize Python code into Verilog for FPGA synthesis and implementation, providing an easier high-level approach to developing FPGA hardware compared to writing RTL directly in Verilog.
[TGDF 2019] Mali GPU Architecture and Mobile StudioOwen Wu
This document provides an overview of Arm's Mobile Studio tools for optimizing graphics and application performance. It describes the GPU architecture of Mali GPUs and concepts like tile-based rendering and render passes. It then introduces the tools in Mobile Studio - Streamline for profiling, Graphics Analyzer for debugging graphics, the Offline Shader Compiler, and Performance Advisor (currently in beta).
A deep dive into energy efficient multi core processorZongYing Lyu
This document discusses techniques for improving energy efficiency in multi-core processors. It describes how the operating system can schedule cores to enter idle states like C1, C2, or C3 to reduce power when not in use. These idle states turn off different components gradually to balance power savings and transition speed. The document also explains how Intel Core 2 Duo processors manage power at the core and shared resource levels, and how cache sizes can be dynamically adjusted based on core activity to optimize performance and power usage.
Libckpt transparent checkpointing under unixZongYing Lyu
James S. Plank, Micah Beck, Gerry Kingsley, Kai Li, “Libckpt: Transparent Checkpointing under UNIX“, Conference Proceedings, Usenix Winter 1995 Technical Conference, New Orleans, LA, January, 1995, pp. 213--223
The document discusses denormalizing database tables to improve query performance. It describes replicating columns across tables to co-locate commonly joined data and facilitate three-table joins without redistributing large amounts of data. This involves adding additional columns like customer ID to other tables to enable co-locating the tables during queries. The approach increases storage usage but can significantly speed up queries.
This document provides a summary of funding opportunities, events, and support for UK creative and digital businesses. It highlights several Innovate UK funding calls for innovative projects in areas like robotics and autonomous systems. It also lists upcoming Horizon 2020 calls and details support available from organizations like Tech City UK, Innovate UK, and the Enterprise Europe Network.
Everyone Needs Life Insurance discusses the importance of life insurance for individuals and families. It notes that life insurance provides money to help support a family after someone passes away by covering costs like funeral expenses and bills. The document recommends considering one's family situation and financial obligations when deciding on life insurance, and suggests using an online calculator to determine the appropriate amount of coverage needed.
1) O documento fornece instruções sobre como criar e configurar questionários no Moodle, incluindo como adicionar perguntas, configurar opções de tempo e tentativas, fornecer feedback e visualizar resultados.
2) São descritos vários tipos de perguntas que podem ser criadas, como múltipla escolha, verdadeiro/falso, ensaio e numéricas.
3) As configurações permitem controlar aspectos como ordem das perguntas, número de tentativas, cálculo de notas e visualização de resultados.
Programme on recently recruited clerks of UCB/DCC/State Cooperative Banksvamnicom123
Programme on recently recruited clerks of UCB/DCC/State Cooperative Banks (4 to 6 October,2016). The objective of this programme to prepare a disciplined market oriented staff understanding cooperative culture. The programme fee is Rs.5,150/-per participant in favor of 'The Director, VAMNICOM, Pune'.
This document discusses expressing certainty and reporting information in text. It provides examples of phrases for asking and giving certainty or uncertainty in responses. These include asking with phrases like "Are you sure?" and giving certainty with responses like "Yes, definitely." The document also provides a sample dialogue demonstrating the use of these phrases and defines a report text as presenting systematic information about a topic. It concludes by thanking the reader and providing the names of the document authors.
1. The report proposes constructing a coffee house called Vivlio Cafe in an empty space at Level 2 of Block E on the university campus.
2. The site is a 27m x 15m roof terrace with nice views that is currently empty space. A concept book cafe style is proposed to provide students a place to study with food and drinks.
3. Plans include furniture like wooden tables and chairs, a counter with books, book shelves, plants and glass walls. A floor plan lays out the zoning and layout of the coffee house.
This document provides a summary of various funding opportunities and events for UK creative businesses in October and November 2015. It lists public funding calls from Innovate UK, including calls related to digital media technologies, smart urban spaces, internet of things security, and more. It also lists upcoming events about accessing Horizon 2020 funding from the EU for areas like smart systems, creativity technologies, and gaming/gamification. Private funding opportunities and non-financial business support resources are also mentioned.
Experian Lunchsessie 25 juli: Loyaliteit begint met een eerste acquirerende s...experiannederland
Het LEARN model: de KPI’s voor elke marketeer: Loyalty, Enrichment, Acquisition, Retention en het NOW moment
In deze sessie gaan we dieper in op de journey van acquisitie naar loyale klant. Een aantal vraagstukken hierbij:
* Wat kun je als bedrijf bieden om klanten tevreden te houden?
* Hoe kom ik van een emailadres tot een volledig profiel?
* Waarom zou een klant 1 op 1 met jouw bedrijf willen communiceren?
The document outlines the agenda for an H2020 5G event on July 12th. The agenda includes sessions on 5G topics from the European Commission, project stories from BT and 5G PPP, views from 5G innovation centers at the University of Surrey and University of Bristol, and a session on the H2020 process and practicalities. The event runs from 12:00-17:00 and includes presentations, Q&A sessions, and networking breaks.
Year 7 energy_resources_and_electrical_circuits_mark_scheme (1)Nurul Aron
1. The document is an exam paper on energy resources and electrical circuits with 6 questions. It provides the questions, marks allocated to each question, and sample answers.
2. Question 1 covers solar cells and wind turbines, asking about reasons they may not work at night or when there is little wind. Question 2 is about fuels and their emissions, asking about ethanol, hydrogen, oxygen and reasons crops are a renewable resource.
3. Question 3 asks about fossil fuels and renewable energy sources. Question 4 covers series and parallel circuits and how circuits are affected if a component fails. Question 5 is about a doorbell circuit and safety around electricity.
4. Question 6 asks about the transfer of energy in a hydro
1. The document is a review for lab practical #3 on anatomy and physiology (A&P) covering bones, muscles, joints, and other structures. It contains 46 multiple choice or fill-in-the-blank questions asking students to identify various anatomical features, structures, and bones labeled on diagrams.
2. The review covers topics including the sella turcica, pituitary gland, external acoustic meatus, oblique muscles, joint types, bones of the skull, femur, and structures of the foot.
3. Bonus questions ask students to identify the side of the body depicted and notches between bones.
It's not difficult to improve yourself, even small changes can make a lot of difference.
This slide is to inform the students on how they should carry themselves at school to look presentable. :D
Enjoy!!
Appul Jot Singh reported on progress made over the last two weeks learning about status reports, keyword planning tools, and finding keywords. They learned how to check robots.txt files, Google sitemaps, 404 error pages, and social media buttons as part of making a status report. They also studied how to analyze keywords by finding random and significant words on a website, such as choosing "free horoscope" from their own site.
Architecture of the oasis mobile shared virtual memory systemZongYing Lyu
William H. Schroeder, Brett D. Fleisch “ Architecture of the Oasis Mobile Shared Virtual Memory System“, The Department of Computer Science and Engineering at the University of California, Riverside (UCR)
Ballette, M. Liotta, A. Ramzy, S.M. ” Execution time prediction in DSM-based mobile grids” : on IEEE International Symposium Cluster Computing and the Grid, 2005. CCGrid 2005.
This document discusses various consistency protocols for replicated data in distributed systems. It covers primary-based protocols where each data item has a primary replica, and replication-based protocols where writes can be done at multiple replicas. For primary-based protocols, it distinguishes between remote-write protocols where operations are done remotely at the primary and local-write protocols where the primary may be copied locally. It also discusses quorum-based replication protocols that use voting to achieve consistency across replicas.
The document discusses various compiler optimizations including:
1. Procedure integration replaces procedure calls with the procedure body to eliminate function call overhead.
2. Common subexpression elimination replaces repeated computations of the same expression with a single variable to store the result.
3. Constant propagation replaces variables assigned a constant value with the constant throughout the code.
4. The document provides examples of these and other optimizations like copy propagation, code motion, induction variable elimination, and loop unrolling which aims to improve performance by reducing instructions and improving pipeline utilization.
The document discusses parallel program design and parallel programming techniques. It introduces parallel algorithm design based on four steps: partitioning, communication, agglomeration, and mapping. It also covers parallel programming tools including pthreads, OpenMP, and MPI. Common parallel constructs like private, shared, barrier, and reduction are explained. Examples of parallel programs using pthreads and OpenMP are provided.
MPI is a language-independent communications protocol used to program parallel computers. It allows processes to communicate and synchronize through point-to-point and collective communication primitives. The document discusses how to install MPI on Linux clusters, describes common MPI functions for communication (e.g. MPI_Send, MPI_Recv) and collective operations (e.g. MPI_Bcast, MPI_Reduce). It also provides an example MPI program to demonstrate basic point-to-point communication between two processes.
This document discusses OpenMP, a specification for parallel programming on shared memory architectures. It provides an outline of OpenMP features, basic syntax using #pragma directives, and support requirements. Examples are given of using OpenMP constructs like parallel for, sections, and directives like num_threads to parallelize loops and divide work across threads. Guidelines are also presented around avoiding data races, deadlocks, and other issues in OpenMP programming.
27. 嵌入式及平行系統27
read 作業方法範例 (1)
ssize_t scull_read(struct file *filp, char user *buf, size_t count, loff_t *f_pos){
struct scull_dev *dev = filp->private_data;
struct scull_qset *dptr; /* the first listitem */
int quantum = dev->quantum, qset = dev->qset;
int itemsize = quantum * qset; /* how many bytes in the listitem */
int item, s_pos, q_pos, rest;
ssize_t retval = 0;
if (down_interruptible(&dev->sem))
return -ERESTARTSYS;
if (*f_pos >= dev->size)
goto out;
if (*f_pos + count > dev->size)
count = dev->size - *f_pos;
/* find listitem, qset index, and offset in the quantum */
item = (long)*f_pos / itemsize;
rest = (long)*f_pos % itemsize;
s_pos = rest / quantum; q_pos = rest % quantum;
28. 嵌入式及平行系統28
read 作業方法範例 (2)
/* follow the list up to the right position (defined elsewhere) */
dptr = scull_follow(dev, item);
if (dptr = = NULL || !dptr->data || ! dptr->data[s_pos])
goto out; /* don't fill holes */
/* read only up to the end of this quantum */
if (count > quantum - q_pos)
count = quantum - q_pos;
if (copy_to_user(buf, dptr->data[s_pos] + q_pos, count)) {
retval = -EFAULT;
goto out;
}
*f_pos += count;
retval = count;
out:
up(&dev->sem);
return retval;
}