Signature-free Buffer Overflow Attack Blocker

1Xinran Wang 2Chi-Chun Pan 2Peng Liu 1
,
2Sencun Zhu
1Department of Computer Science and Engineering
2College of Information Sciences and Technology
The Pennsylvania State University, University Park, PA 16802


Abstract

We propose SigFree, a realtime, signature-free, out-ofthe- box, application layer blocker for preventing buffer overflow attacks, one of the most serious cyber security threats. SigFree can filter out code-injection buffer overflow attack messages targetin ....etc

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Definition

Have you ever thought of a buffer overflow attack ? It occurs through careless programming and due to patchy nature of the programs. Many C programs have buffer overflow vulnerabilities because the C language lacks array bounds checking, and the culture of C programmers encourages a performance-oriented style that avoids error checking where possible. Eg: gets and strcpy ( no bounds checking ). This paper presents a systematic solution to the persistent problem of buffer overflow attacks. Buffer overflow attack gained notoriety in ....etc

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A Signature-free Buffer Overflow Attack Blocker





Abstract:-

This project propose SigFree, a realtime, signature-free, out-ofthe-box, application layer blocker for preventing buffer overflow attacks, one of the most serious cyber security threats. SigFree can filter out code-injection buffer overflow attack messages targeting at various Internet services such as web service. Motivated by the observation that buffer overflow attacks typically contain execu ....etc

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to get information about the topic buffer overflow attack -problems and its imlicationsfull report ppt and related topic refer the page link bellow

http://seminarsprojects.net/Thread-buffer-overflow-attack-a-potential-problem-and-its-implications?pid=41276&mode=threaded

http://seminarsprojects.net/Thread-buffer-overflow-attack-a-potential-problem-and-its-implications?pid=34079&mode=threaded ....etc

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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 adjacent memory 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 o ....etc

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BY:-Bablu Joshi

UNDER THE GUIDENCE OF:-
Ankit Agarwal


AGENDA

An overview to Buffer
Buffer overflow
Buffer overflow Attack
Counter measures
Stack Guard
W Execute
Address Space Layout Randomly
Buffer overflow attack in terms of C language
Stack Smashing
Heap Attack
Function Pointer Attack
Return-into-libC Attack
Attacking Behaviours
Keylogging
Sniffing Traffic
Spamming
Distributed Denial Of Services(DDOS)

Overview to Buffer overflow

Buffer: memory used to stor ....etc

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Chapter 1. Introduction
By combining the C programming language s liberal approach to memory
handling with specific Linux filesystem permissions, this operating system
can be manipulated to grant unrestricted privilege to unprivileged accounts
or users. A variety of exploit that relies upon these two factors is commonly
known as a buffer overflow, or stack smashing vulnerability. Stack smashing
plays an important role in high profile computer security incidents. In order
to secure modern Linux systems, it is necessar ....etc

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Buffer Overflow , Virus & Worms and The stacheldraht service attack tool

abstract
over flow
A process in memory:
- text (Program code; marked
read-only, so any attempts to
write to it will result in
segmentation fault)
- data segment (Global and
static variables)
- stack (Dynamic variables)

The process is blocked and is rescheduled to run again with a larger memory space if the user attack exhausts available memory.

worm and virus

parasitic programs which are ....etc

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please send me the documentation of buffer overflow attck:a potential problem and its implications ....etc

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