'Buffer overflows' diaporamas de présentation

Software Vulnerabilities: Definition, Classification, and Prevention

Software Vulnerabilities: Definition, Classification, and Prevention. Overview. What are software vulnerabilities? Types of vulnerabilities Buffer Overflows Format String Vulnerabilities How to find these vulnerabilities and prevent them? Classes of software vulnerabilities.

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Bugs, security vulnerabilities, and automated tools

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UNIX Security

UNIX Security. These slides were prepared by Mr Campbell Wilson School of CSSE Campbell.Wilson@infotech.monash.edu.au. History . UNIX was never supposed to be secure. Security compromises convenience.

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Topics

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Buffer Overflows : An In-depth Analysis

Buffer Overflows : An In-depth Analysis. Introduction. A buffer overflow occurs when data written to a buffer, due to insufficient bounds checking, corrupts data values in memory addresses adjacent to the allocated buffer. Buffer overflows were understood as early as 1972.

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David Evans evans@cs.virginia cs.virginia/~evans

The Bugs and the Bees Research in Programming Languages and Security. David Evans evans@cs.virginia.edu http://www.cs.virginia.edu/~evans. University of Virginia Department of Computer Science. What is Computer Science?.

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Hacking Exposed

Hacking Exposed. May 5, 2004 Jan Decrock Karel Dekyvere. Agenda. Some reflections The attackers process Things you must do. What is it about?. P P T. In this order!. eople rocess echnology. How it usually goes. Attacker Processes. Buffer Overflows Shovel a Shell

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Buffer Overflow

Buffer Overflow. Introduction. On many C implementations, it is possible to corrupt the execution stack by writing past the end of an array. Known as smash the stack. It can cause return from the routine to jump to a random address.

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Control Hijacking Attacks

Control Hijacking Attacks. Buffer overflows and format string bugs. Buffer overflows. Extremely common bug. First major exploit: 1988 Internet Worm. fingerd. 15 years later: ? 50% of all CERT advisories: 1998: 9 out of 13 2001: 14 out of 37 2003: 13 out of 28

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DieHard: Probabilistic Memory Safety for Unsafe Programming Languages

DieHard: Probabilistic Memory Safety for Unsafe Programming Languages. Emery Berger University of Massachusetts Amherst. Ben Zorn Microsoft Research. Problems with Unsafe Languages. C, C++: pervasive apps, but langs. memory unsafe Numerous opportunities for security vulnerabilities, errors

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Security Testing Fundamentals

Security Testing Fundamentals. Susan Congiu QASecure@aol.com 2/2002. 5 Principles Needing to Test. Authentication: Identity - Validity Login, timeout, failures, pw changes, mins/maxs, stored encrypted, bypass captured URL, handling deletion of outdated, expirations, 2-factor:atm

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Protecting Memory

Protecting Memory. What is there to protect in memory? Page tables and virtual memory protection Special security issues for memory Buffer overflows. What Is In Memory?. Executable code Integrity required to ensure secure operations Copies of permanently stored data

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Keynote Frank Fischer Manager Technologieberater Microsoft Deutschland GmbH

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System Hacking

System Hacking. Active System Intrusion. Aspects of System Hacking. System password guessing Password cracking Key loggers Eavesdropping Sniffers Man in the middle DoS Buffer overflows Privilege escalation Remote control and backdoor Track covering Hide sensitive information.

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Statically Detecting Likely Buffer Overflow Vulnerabilities

Statically Detecting Likely Buffer Overflow Vulnerabilities. David Larochelle David Evans. Supported by USENIX Student Grant and NASA LRC. University of Virginia Department of Computer Science. 1988: Morris worm exploits buffer overflows in fingerd to infect 6,000 servers

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Buffer Overflows: Attacks and Defenses for the Vulnerability of the Decade

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Computer Science Patent Ideas Team JABS Group # 1

Computer Science Patent Ideas Team JABS Group # 1. Joanne Akshay Boaz Siddharth. Students . Joanne Chen EECS Major Akshay Kannan EECS Major with entrepreneurial interest Boaz Avital EECS Major with interest in databases Siddharth EECS Major. Area of Interest .

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The Evolution and Decay of Statically Detected Source Code Vulnerabilities

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Security and Open Source: the 2-Edged Sword

Security and Open Source: the 2-Edged Sword. Crispin Cowan, Ph.D WireX Communications, Inc wirex.com. Reliability and Security.

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Simple Buffer Overflow Example

Simple Buffer Overflow Example. Dan Fleck CS469 Security Engineering Reference: http:// www.thegeekstuff.com /2013/06/buffer-overflow/ . 1. 1. Buffer Overflows. Buffer overflows occur when some sized portion of memory is overwritten with something bigger. For example:

280 views • 7 slides