PPT-Buffer Overflows

Many of the following slides are based on those from Complete Powerpoint Lecture Notes for Computer Systems A Programmers Perspective CSAPP Randal E Bryant and David R OHallaron. More over buffer overflow vulnerabilities dominate the area of remote network penetra tion vulnerabilities where an anonymous Inter net user seeks to gain partial or total control of a host If buffer overflow vulnerabilities could be effectively eli More over buffer overflow vulnerabilities dominate the area of remote network penetra tion vulnerabilities where an anonymous Inter net user seeks to gain partial or total control of a host If buffer overflow vulnerabilities could be effectively eli More over buffer overflow vulnerabilities dominate the area of remote network penetra tion vulnerabilities where an anonymous Inter net user seeks to gain partial or total control of a host If buffer overflow vulnerabilities could be effectively eli . Attacker’s goal. :. Take over target machine (e.g. web server). Execute arbitrary code on target by . hijacking application control flow. This lecture: three examples.. Buffer overflow attacks. Overflow Example. 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.. Buffer Overflows for Beginners. Herbert . Bos. VU University Amsterdam. Buffer overflows are…. ancient. First . discussed. in a US Air . Force. document in 70s. Used. in the . first. Internet Worm (. 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. Our City’s . Old Sewers. How the state is helping. In early 2015, New Jersey issued new permits to the 25 communities and sewage treatment plants that have CSOs. These permits require that cities and treatment plants must: . C memory layout. We talked about the heap and stack last time.. Heap: dynamically allocated data (so grows and shrinks depending on objects created). Stack: grows and shrinks as functions are called and return. Serious Note. Try a web search for “buffer overflow exploit”.. Check alt.2600, rootshell.com, antionline.com – you can find long lists of . exploits. based on buffer overflow.. Even the original version of . Trausti Saemundsson, . Reykjavik University. Introduction. I am Trausti Saemundsson, a MSc student at Reykjavik University in Iceland . My supervisor is Ymir Vigfusson . I´m here in London doing research with Gregory Chockler on a multitenant cache algorithm . David Brumley. Carnegie Mellon University. You will find. a. t least one . error. on each set of slides. . :). 2. Red. format c:. Blue. vs.. 3. An Epic Battle. Red. format c:. Blue. Bug. 4. Find. . Exploitable. based on those . from . Complete . Powerpoint. Lecture Notes for. Computer Systems: A Programmer's Perspective (CS:APP). Randal E. Bryant. and . David R. . O'Hallaron. . http://. www.cs.cmu.edu/afs/cs/academic/class/15213-f15/www/schedule.html. 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..