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DroidComp - bi0sCTF 2022

komi
2023-01-25
Misc

tl;dr

  • Exploit Android Webview Javascript Interface
  • Communicate with a Service via AIDL
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Android bi0sCTF-2022

Lost Exponent - Pwn2Win 2021

xxMajinxx
2021-06-05
Misc

tl;dr

  • Reverse bytearray to recover matrix cflag.
  • Use first element of matrix to recover e (bruteforce &iroot)
  • Reduce the flag to finite field of a 32-bit prime, solve for each character.
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Pwn2Win Writeup Misc Matrix

Secure Note - InCTF Internationals 2020

4lph4
2020-08-14
Misc

tl;dr

  • Challenge involves Reversing, Web, and Crypto
  • Reverse the binary to get the endpoints
  • Trigger the XSS bug in the website and get admin cookie
  • Use Hash Length extension attack to get authenticated as admin and get the flag
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InCTFi Master Challenge

Invisible Maze- InCTF Internationals 2020

officialcjunior
2020-08-14
Misc

tl;dr

  • Challenge is a Nintendo GameBoy ROM image.
  • Reverse the ROM and figure out the implementation
  • Analyze the calling function’s checks to find the path along which we must move.
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InCTFi Gameboy

golf.so - PlaidCTF 2020

d4rk_kn1gh7
2020-04-29
Misc / Linux / ELF

tl;dr

  • Hand-crafting a linux shared object file with a size of less than 194 bytes
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Plaid

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    (Juniors CTF)

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