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Application-Aware SoftWare AnomalyTreatment (SWAT)
Application-Aware SoftWare AnomalyTreatment (SWAT)

... Application Aware Out-of-Bounds Detector • Address faults may result in long detection latencies – Corrupt address unallocated but in valid page – Many data value corruptions before symptoms • Low-cost out-of-bounds detector for HW faults – Amortize resiliency cost with SW bug detectors ...
Lecture 16 Handout
Lecture 16 Handout

...  A Stack is an ordered collection of items into which new data items may be added/inserted and from which items may be deleted at only one end  A Stack is a container that implements the Last-In-First-Out (LIFO) protocol Stack in Our Life  Stacks in real life: stack of books, stack of plates  Ad ...
Transport
Transport

...  sender puts checksum value into UDP checksum field ...
EE4390 Microprocessors
EE4390 Microprocessors

... Assembly Process • Assembler converts assembly language source file (*.asm) to machine language (1’s and 0’s) • Motorola machine language file is an *.S19 • As part of the assembly process one can generate a list file (*.lst) – contains address for each instruction – provides contents of each addre ...
slides ppt
slides ppt

... solve an optimization problem. – We can choose which optimization problem, by choosing the right buffer size & by changing TCP’s code. ...
lecture - (www.CUNY.edu).
lecture - (www.CUNY.edu).

... unused buffer space by including rwnd value in segment header  sender: limits # of unACKed bytes to rwnd ...
Learning Objectives by Lesson
Learning Objectives by Lesson

... (a) Discuss the role of the operating system in bridging the gap between hardware and user applications and services. (b) Explain the relationship between secondary memory, main memory and the CPU. (c) Explain the meaning of the terms byte, word and half-word. (d) Convert between binary and decimal ...
pps - AquaLab - Northwestern University
pps - AquaLab - Northwestern University

... • Check if references are to inside sandbox – Dynamic jumps require dynamic checks (inserting code) – Systems calls through a reference monitor (interposition) ...
OKL4 Microvisor
OKL4 Microvisor

... • rexec to current host and would try a rsh command to the remote host using the username taken from the file. • This attack would succeed in those cases where the remote machine had a hosts.equiv file or the user had a .rhosts file that allowed remote execution without a password. ...
Web Application Attacks Presentation
Web Application Attacks Presentation

... see if http changes to https. ...
CS4023 * Operating Systems
CS4023 * Operating Systems

... operating system to delete it using the exit() system call. – Returns status data from child to parent (via wait()) – Process’ resources are deallocated by operating system ...
1 | I.C.T.C. “International Computer Training Center” www.ictc.gr info
1 | I.C.T.C. “International Computer Training Center” www.ictc.gr info

... This class will immerse the student into an interactive environment where they will be shown how to scan, test, hack and secure their own systems. Students then learn how intruders escalate privileges and what steps can be taken to secure a system. Who Should Attend This course will significantly be ...
Stacks - Courses
Stacks - Courses

... • The names of the methods supported by an ADT • How those methods are to be declared and used – e.g., what order the parameters are listed in ...
MICRO-35 Tutorial - Applied Research Laboratory
MICRO-35 Tutorial - Applied Research Laboratory

... in Proceedings of the 2000 International Conference on Supercomputing, May 2000. [CFBB00b] P. Crowley, M.E. Fiuczynski, J.-L. Baer, & B. N. Bershad, “Chapter 7: Workloads for Programmable Network Interfaces” in Workload Characterization for Computer System Design, Kluwer Academic Publishers, 2000. ...
Information Assurance Presentation
Information Assurance Presentation

... security flaw in programs. Unfortunately, matters haven't improved since that study was done in 1999. Not a week goes by without the announcement of yet another serious overflowtriggered vulnerability.  Overflows occur when a program tries to store more data than the allocated memory can hold. The ...
Lecture 16 - Suraj @ LUMS
Lecture 16 - Suraj @ LUMS

... – Blaster worm defect only two lines long – One line error can be catastrophic ...
System Security - Wright State engineering
System Security - Wright State engineering

... We think of computer systems as providing services to authorized users.  When a system is deliberately made to crash, or made to run legitimate users' programs so very slowly that it is unusable, we refer to it as a "denial of ...
Data and Applications Security - The University of Texas at Dallas
Data and Applications Security - The University of Texas at Dallas

... Other forms of attacks, such as distributed denial of service attacks, sometimes rely on B.O.A. B.O.A. exploit the memory organization of the traditional activation stack model to overwrite the return address stored on the stack. This memory organization can be slightly changed so as to prevent buff ...
Chapter 7 Review
Chapter 7 Review

... While reviewing logs for a web application, a developer, a developer notices that is has crashed several times reporting a memory error. Shortly after it crashes, the logs show malicious code that isn’t part of a known application. What is MOST likely occurring? A. Buffer overflow B. XSS C. Cross-s ...
PDF
PDF

... very simple to implement but does not provide fair distribution of buffer space. If multiple TCP connections exist in the system and a buffer overflow will cause TCP global synchronization, which reduce the network throughput.[1]. Active Queue Management employs preventive packet drop before the rou ...
Ex02
Ex02

... public static void main(String[] args) { try { // this could be changed to an IP name or address other than the localhost Socket sock = new Socket("127.0.0.1",6013); InputStream in = sock.getInputStream(); BufferedReader bin = new BufferedReader(new InputStreamReader(in)); String line; ...
4061_26
4061_26

... – Establish network connection with remote host, copy remainder of file over ...
Mapping of scalable RDMA protocols to ASIC/FPGA
Mapping of scalable RDMA protocols to ASIC/FPGA

... • Currently using Virtex-II/Virtex-IIPro (Xilinx) as target devices for our cores • Data indicate that most of the key cores will fit one FPGA device (Virtex-II) • Aggregate of all cores is spanning several FPGAs • Intra-device communication is a issue, need to be careful with PCB design. • We are c ...
Device Methods
Device Methods

... interface into a global list of network devices Interfaces are described in: struct net_device (in linux/netdevice.h) Keep track of sn0 and sn1 with this: struct net_device *snull_devs[2]; which are allocated with this: ...
Chapter 7 Review
Chapter 7 Review

... While reviewing logs for a web application, a developer notices that it has crashed several times reporting a memory error. Shortly after it crashes, the logs show malicious code that isn’t part of a known application. What is MOST likely occurring? A. Buffer overflow B. XSS C. Cross-site scripting ...
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Buffer overflow

In computer security and programming, a buffer overflow, or buffer overrun, is an anomaly where a program, while writing data to a buffer, overruns the buffer's boundary and overwrites memory in adjacent locations. This is a special case of the violation of memory safety.Buffer overflows can be triggered by inputs that are designed to execute code, or alter the way the program operates. This may result in erratic program behavior, including memory access errors, incorrect results, a crash, or a breach of system security. Thus, they are the basis of many software vulnerabilities and can be maliciously exploited.Programming languages commonly associated with buffer overflows include C and C++, which provide no built-in protection against accessing or overwriting data in any part of memory and do not automatically check that data written to an array (the built-in buffer type) is within the boundaries of that array. Bounds checking can prevent buffer overflows.
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