BackdoorCTF 2021
8 challenges with 19 published community solutions between them. Solution links go to CTFtime’s task page, which aggregates every writeup for a challenge - individual blog posts rot, the aggregator does not.
Full task list on CTFtimeUncategorised4
The upstream scoreboard did not say, so neither do we.
babyKernel
6 official solutionsAlso written up in: mito753/Kernel-Exploit-Dojo, mito753/Kernel-Exploit-Dojo, mito753/Kernel-Exploit-Dojo, mito753/Kernel-Exploit-Dojo, mito753/Kernel-Exploit-Dojo, mito753/Kernel-Exploit-Dojo
Babycompiler
1 official solutionAlso written up in: qsctr/ctf
Haikyu
1 official solutionAlso written up in: jontay999/CTF-writeups
P33 Kill
1 official solutionAlso written up in: qsctr/ctf
Cryptography2
Recover a plaintext or a key from something that was supposed to protect it. In practice: identify the scheme, find the parameter the author got wrong, exploit it.
Also written up in: ahmedazizkhelifi/CTF
- misc
- crypto
Same technique in picoCTF: It's Not My Fault 2, StegoRSA, AES-ABC
- crypto
Same technique in picoCTF: It's Not My Fault 2, StegoRSA, AES-ABC
Binary exploitation1
Turn a memory-safety bug in a native binary into control of execution. Usually a stack overflow, a format string, or a heap primitive.
Also written up in: junron/writeups, badsudo/ctf-writeups, badsudo/ctf-writeups
- heap
- integer_overflow
- use-after-free
Same technique in picoCTF: vr-school, sice_cream, zero_to_hero
Misc1
Everything that fits no other box: esolangs, puzzles, scripting exercises, and the jail escapes that have not yet earned their own category.
SCAndal
1 writeupAlso written up in: junron/writeups
Same technique in picoCTF: PW Crack 2, Permissions, Specialer