PPT-Simple Buffer Overflow Example

Dan Fleck CS469 Security Engineering Reference http wwwthegeekstuffcom 201306bufferoverflow Coming up Buffer Overflows 1 1 Buffer Overflows Buffer overflows occur when some sized portion of memory is overwritten with something bigger. 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. KarlineSoetaert3example(image3D)example(contour3D)example(colkey)example(jet.col)example(perspbox)example(mesh)example(trans3D)example(plot.plist)example(ImageOcean)example(Oxsat)2.Functionsimage2Dand . Chapter 10 Malicious software. Part B. Index. Social Engineering. Malware Payload. Countermeasures of malware. DDoS. Buffer overflow. Social Engineering. Tricking user to assist in the comprise of their own systems or personal information. 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 . 15-213: Introduction to Computer Systems. 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. 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. . 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 . 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 . 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. Stack. in the higher parts of memory. Grows down. Used when a . function is called. Data Area. Global variables . not . inizialited. . to zero. BSS [. Block. . Started. by Symbol. ]. Segment. Global variables . 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); Bogi Hansen, Karin M. H. Larsen, Steffen Olsen, Detlef Quadfasel, Kerstin Jochumsen, Svein Østerhus. Canonical value for. IFR-overflow: 1 Sv . IFR. Arctic Mediterranean. WV-overflow:. Western Valley 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..