PPT-By Collin Donaldson Buffer Overflow

A buffer is a contiguous allocated chunk of memory such as pointers arrays lists etc Languages like C and C do not feature automatic bounds checking on the buffer so it can be bypassed. Buffer Overflow. modified from slides of . Lawrie. Brown. Buffer Overflow. a very common attack mechanism. first wide use by the Morris Worm in 1988. prevention techniques known. still of major concern. Chapter. 15 : . Attacking. . Compiled. Applications. Alexis Kirat - International Student. Native . execution. . environment. Vs. . Compiled. . execution. . environment. The majority of web applications are now written using languages and platforms that run in a managed execution environment in which classic vulnerabilities . http://en.wikipedia.org/wiki/Stack_buffer_overflow. What is a stack buffer overflow?. Caused when a program writes more data to a buffer on the stack than what was initially allocated for the buffer. CS 465. Slides by Kent Seamons and Tim van . der. Horst. Last Updated: . Nov 11, 2011. Buffer Overflow. The most common security vulnerability. Root cause. Unsafe programming languages. What areas of process memory are vulnerable to a buffer overflow?. Exploiting Software. Exploiting Software . The exploitation of software is one of the main ways that a users computer can be broken into. . It involves exploiting the software running on the users computer to do something that was not intended by the developer. . What is an Exploit?. An . exploit. . is any . input. (i.e., a piece of software, an argument string, or sequence of commands) that takes advantage of a bug, glitch or vulnerability in order to cause an attack. & . Rootkits. Warning. Do not use hacking tools unless you are . sure . you have . sysadmin’s. permission.. Company policy .  fired/suspended. Illegal Go to Jail. Honor Code. Just because you have a set of master-keys does NOT give you permission to drive anyone’s car!. Chih. Hung Wang. Reference:. 1. B. Chess and J. West, Secure Programming with Static Analysis, Addison-Wesley, 2007.. 2. R. C. . Seacord. , Secure Coding in C and C , Addison-Wesley, 2006.. 1. Introduction (1). modified from slides of . Lawrie. Brown. Buffer Overflow. a very common attack mechanism. first wide use by the Morris Worm in 1988. prevention techniques known. still of major concern. legacy of buggy code in widely deployed operating systems and applications. modified from slides of . Lawrie. Brown. Buffer Overflow. a very common attack mechanism. first wide use by the Morris Worm in 1988. prevention techniques known. still of major concern. legacy of buggy code in widely deployed operating systems and applications. modified from slides of . Lawrie. Brown. Buffer Overflow. a very common attack mechanism. first wide use by the Morris Worm in 1988. prevention techniques known. still of major concern. legacy of buggy code in widely deployed operating systems and . Recitation 6, Oct 1, 2012. Alexander Malyshev (amalyshe). Section A, 10:30a – 11:20p, WeH 4623. Agenda. Buffer overflow. Writing a C program. Makefiles. Revision Control. Buffer Overflow. We have . Network Security Fundamentals 2. Zero day attacks. “zero day”. Web application attacks. Signing up for a class. Hardening the web server. Enhancing the security. May not prevent against web attacks. Dan Fleck. CS469 Security Engineering. Reference: . http://. www.thegeekstuff.com. /2013/06/buffer-overflow/ . Coming up: Buffer Overflows. 1. 1. Buffer Overflows. Buffer overflows occur when some sized portion of memory is overwritten with something bigger..