$ ctf42

#jni CTF challenges

4 CTF challenges using jni from 4 CTFs (2018–2026), 4 with writeups. Mostly Reverse (25%) and Mobile (25%).

Reverse · 1 Mobile · 1 Misc · 1 Pwn · 1

Often combined with

#native-library 3 #android 2 #jadx 1 #arm 1 #android-reversing 1 #type-confusion 1 #pyjnius 1

Challenges

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Challenge CTF Weight Category Has
android_ololo_country_checker CTFZone 2018 Quals 23.92 Misc files wu 2
Snaking_Revenge SAS 2026 Quals 31.00 Pwn files wu 1
watercolor S4CTF 2021 24.52 Reverse files wu 1
JNIdorino UMDCTF 2023 – Mobile files wu 1