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sploitF-U-N

March 7, 2016. BKP CTF – Complex Calc Writeup. March 7, 2016. March 8, 2016. Is almost same as simple calc. Elf with some minor change! To figure out what that change is, I first ran simple calc’s exp.py against complex calc’s binary and found that complex calc’s binary crashed. Lets analyze the core file! Gdb -q ./d60001db1a24eca410c5d102410c3311d34d832c. Reading symbols from ./d60001db1a24eca410c5d102410c3311d34d832c.(no debugging symbols found).done. gdb-peda$ core-file core. 000 rw-p 00000000 00:00 0...

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sploitF-U-N | sploitfun.wordpress.com Reviews

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March 7, 2016. BKP CTF – Complex Calc Writeup. March 7, 2016. March 8, 2016. Is almost same as simple calc. Elf with some minor change! To figure out what that change is, I first ran simple calc’s exp.py against complex calc’s binary and found that complex calc’s binary crashed. Lets analyze the core file! Gdb -q ./d60001db1a24eca410c5d102410c3311d34d832c. Reading symbols from ./d60001db1a24eca410c5d102410c3311d34d832c.(no debugging symbols found).done. gdb-peda$ core-file core. 000 rw-p 00000000 00:00 0...

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sploitF-U-N | sploitfun.wordpress.com Reviews

https://sploitfun.wordpress.com

March 7, 2016. BKP CTF – Complex Calc Writeup. March 7, 2016. March 8, 2016. Is almost same as simple calc. Elf with some minor change! To figure out what that change is, I first ran simple calc’s exp.py against complex calc’s binary and found that complex calc’s binary crashed. Lets analyze the core file! Gdb -q ./d60001db1a24eca410c5d102410c3311d34d832c. Reading symbols from ./d60001db1a24eca410c5d102410c3311d34d832c.(no debugging symbols found).done. gdb-peda$ core-file core. 000 rw-p 00000000 00:00 0...

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sploitfun.wordpress.com

1

BKP CTF – Complex Calc Writeup | sploitF-U-N

https://sploitfun.wordpress.com/2016/03/07/bkp-ctf-complex-calc-writeup

BKP CTF – Complex Calc Writeup. March 7, 2016. March 8, 2016. Is almost same as simple calc. Elf with some minor change! To figure out what that change is, I first ran simple calc’s exp.py against complex calc’s binary and found that complex calc’s binary crashed. Lets analyze the core file! Gdb -q ./d60001db1a24eca410c5d102410c3311d34d832c. Reading symbols from ./d60001db1a24eca410c5d102410c3311d34d832c.(no debugging symbols found).done. gdb-peda$ core-file core. 0 0x00000000004156e9 in free (). 000 rw-...

2

Use-After-Free | sploitF-U-N

https://sploitfun.wordpress.com/2015/06/16/use-after-free

June 16, 2015. July 23, 2015. Off-By-One Vulnerability (Heap Based). What is use-after-free (UaF)? Continuing to use a heap memory pointer which is already been freed is called use-after-free bug! This bug can lead to arbitrary code execution. Echo 2 /proc/sys/kernel/randomize va space $gcc -o vuln vuln.c $sudo chown root vuln $sudo chgrp root vuln $sudo chmod s vuln. Line[6]’s UaF leads to information leakage while Line[13]’s UaF leads to arbitrary code execution. What is information leakage? Line [4] a...

3

Integer Overflow | sploitF-U-N

https://sploitfun.wordpress.com/2015/06/23/integer-overflow

June 23, 2015. June 25, 2015. Ubuntu 12.04 (x86). What is Integer Overflow? Data types size and its range:. When we try to store a value greater than maximum supported value, our value gets wrapped around. For example when we try to store 2147483648 to signed int data type, its gets wrapped around and stored as -21471483648. This is called integer overflow and this overflow could lead to arbitrary code execution! Echo 0 /proc/sys/kernel/randomize va space $gcc -g -fno-stack-protector -z execstack -o vuln...

4

Understanding glibc malloc | sploitF-U-N

https://sploitfun.wordpress.com/2015/02/10/understanding-glibc-malloc

February 10, 2015. July 6, 2015. I always got fascinated by heap memory. Questions such as. How heap memory is obtained from kernel? How efficiently memory is managed? Is it managed by kernel or by library or by application itself? Can heap memory be exploited? Were in my mind for quite some time. But only recently I got time to understand about it. So here I would like to share my fascination turned knowledge! Out there in the wild, many memory allocators are available:. Ptmalloc2 – glibc. After fork, t...

5

Off-By-One Vulnerability (Stack Based) | sploitF-U-N

https://sploitfun.wordpress.com/2015/06/07/off-by-one-vulnerability-stack-based-2

Off-By-One Vulnerability (Stack Based). June 7, 2015. July 5, 2015. Classic Stack Based Buffer Overflow. Ubuntu 12.04 (x86). What is off-by-one bug? Copying source string into destination buffer could result in off-by-one when. Source string length is equal to destination buffer length. As always enough of definitions, lets look into an off-by-one vulnerable code! Echo 0 /proc/sys/kernel/randomize va space $gcc -fno-stack-protector -z execstack -mpreferred-stack-boundary=2 -o vuln vuln.c $sudo chown ...

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sploitF-U-N

March 7, 2016. BKP CTF – Complex Calc Writeup. March 7, 2016. March 8, 2016. Is almost same as simple calc. Elf with some minor change! To figure out what that change is, I first ran simple calc’s exp.py against complex calc’s binary and found that complex calc’s binary crashed. Lets analyze the core file! Gdb -q ./d60001db1a24eca410c5d102410c3311d34d832c. Reading symbols from ./d60001db1a24eca410c5d102410c3311d34d832c.(no debugging symbols found).done. gdb-peda$ core-file core. 000 rw-p 00000000 00:00 0...

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Welcome to SploitLab, a collection of tools, projects, links, and blogs related to my passion of working and volunteering in the information security community. University of Florida Student Infosec Team (UF SIT). July 22, 2015:. Dark Reading Webinar: Effective Incident Response Using Actionable Intelligence. July 29, 2015:. Red vs Red vs Blue Cyber Event. Sept 25, 2015:. June 2, 2015:. Dark Reading Radio: Developing a Data Breach Incident Response Plan. Apr 27, 2015:. 2015 Interop Las Vegas.

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Some sploits, code, and ramblings. Nothing of much consequence. New content and modules on the way. Bull;November 15, 2011 • 1 Comment. I’ve since rewritten the module with native MSF libs, removed the dependency on an external JSON rubygem, added support for the “page” Shodan variable, and more. The final thing to do before resubmitting (via the new git system) is to debug an issue where my results differ from a Shodan web search with the same parameters. More to come…. SHODAN is an extremely useful too...

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PyHashcat v0.5 beta Released. NOTE: This is a cross-post from www.frogstarworldc.com]. PyHashcat v0.5 has been released on github. You can find it here. If you're not familiar with pyHashcat you can read a little about it here. Added support for hashcat via the HashcatWrapper class. Usage is similar to the oclHashcatWrapper class. See the README.txt. Support for new hash types added to oclHashcat v1.30. Added cpu type to HashcatWrapper to use AVX/XOP binaries ( again thanks to Michael Sprecher). Wrapper ...

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