By Saurabh Sharma & Chinmaya Kamal                                       (SETLabs, Infosys)http://null.co.in/             ...
●   Buffer overflow attacks●   Cookie prevention●   Buffer Under Run Attacks                               Saurabh & Chinm...
•Buffer overflow attacks are caused when the buffers such as arraysare filled without the proper bound checking.•In some l...
Saurabh & Chinmaya
Saurabh & Chinmaya
Saurabh & Chinmaya
Saurabh & Chinmaya
Saurabh & Chinmaya
Demo       Saurabh & Chinmaya
•PHP5 Space Trimming Buffer UnderFlow (Header(), MacOSX)                       Saurabh & Chinmaya
Saurabh & Chinmaya
Thank You    Saurabh & Chinmaya
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nullcon 2011 - Buffer UnderRun Exploits

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Buffer UnderRun Exploits by Chinmaya Kamal & Saurabh Sharma

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nullcon 2011 - Buffer UnderRun Exploits

  1. 1. By Saurabh Sharma & Chinmaya Kamal (SETLabs, Infosys)http://null.co.in/ Saurabh & Chinmaya http://nullcon.net/
  2. 2. ● Buffer overflow attacks● Cookie prevention● Buffer Under Run Attacks Saurabh & Chinmaya
  3. 3. •Buffer overflow attacks are caused when the buffers such as arraysare filled without the proper bound checking.•In some languages like C, boundchecking mechanisms are notimplemented. When the input data whichis used to fill the buffer is greater thanthe size of the allocated buffer, othervalues in the stack get overwritten. If theattacker designs this input carefully, hecan overwrite the return address with theaddress of his will. This address maypoint to some custom code, can be amalicious shell code. These attacks areknown as buffer overflow attacks. Saurabh & Chinmaya
  4. 4. Saurabh & Chinmaya
  5. 5. Saurabh & Chinmaya
  6. 6. Saurabh & Chinmaya
  7. 7. Saurabh & Chinmaya
  8. 8. Saurabh & Chinmaya
  9. 9. Demo Saurabh & Chinmaya
  10. 10. •PHP5 Space Trimming Buffer UnderFlow (Header(), MacOSX) Saurabh & Chinmaya
  11. 11. Saurabh & Chinmaya
  12. 12. Thank You Saurabh & Chinmaya

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