PPT-Stack buffer overflow

httpenwikipediaorgwikiStackbufferoverflow 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. 16. 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. 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 . (based on Ch. 10 and 11 . of Stallings and Brown) . Last time: Buffer Overflows. a very common attack mechanism. first widely used by the Morris . Worm. in 1988. still . of major . concern. legacy of buggy code in widely deployed operating systems and applications. Gabe Kanzelmeyer. CS 450. 4/14/10. Overview. What is buffer overflow?. How memory is processed and the stack. The threat. Stack overrun attack. Dangers. Prevention. What is buffer overflow?. A buffer (array/string) that holds data. 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. Dr. X. Metasploitable. Not everything is what it looks like. …. You opened a reverse shell with root priviledges. B. ut did you?. Metasploitable. There was a bug. You were root back on the kali VM not the . (based on Ch. 10 and 11 . of Stallings and Brown) . Last time: Buffer Overflows. a very common attack mechanism. first widely used by the Morris . Worm. in 1988. still . of major . concern. legacy of buggy code in widely deployed operating systems and applications. Stack frame layout. #include <. string.h. >. void foo (char *bar). {. . char c[12];. . . strcpy. (c, bar); //no bound. }. int. main (. int. . argc. , char **. argv. ). {. . foo(. argv. 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 . Compile time vs Run time main( argc , argv , envp ) int argc ; char ** argv ; char ** envp ; { int i ; char *name, buf [32]; name = getname (); printf ("your name is %s\n", name); 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..