Hacktober CTF
48 challenges with 87 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 CTFtimeMisc21
Everything that fits no other box: esolangs, puzzles, scripting exercises, and the jail escapes that have not yet earned their own category.
- programming
Same technique in picoCTF: Permissions, Specialer, Codebook
Same technique in picoCTF: Permissions, Specialer, Codebook
- linux
Same technique in picoCTF: Permissions, Specialer, plumbing
Same technique in picoCTF: Permissions, Specialer, Codebook
Same technique in picoCTF: Permissions, Specialer, Codebook
Same technique in picoCTF: Permissions, Specialer, Codebook
Talking to the Dead 3
3 writeupsSame technique in picoCTF: Permissions, Specialer, Codebook
Same technique in picoCTF: Permissions, Specialer, Codebook
- programming
Same technique in picoCTF: Permissions, Specialer, Codebook
Same technique in picoCTF: Permissions, Specialer, Codebook
Same technique in picoCTF: Permissions, Specialer, Codebook
- python3
- python
- scripting
Same technique in picoCTF: PW Crack 1, PW Crack 2, PW Crack 3
- linux
Same technique in picoCTF: Permissions, Specialer, plumbing
Same technique in picoCTF: Permissions, Specialer, Codebook
Same technique in picoCTF: Permissions, Specialer, Codebook
Same technique in picoCTF: Permissions, Specialer, Codebook
Same technique in picoCTF: Permissions, Specialer, Codebook
Same technique in picoCTF: Permissions, Specialer, Codebook
- programming
Same technique in picoCTF: Permissions, Specialer, Codebook
Same technique in picoCTF: Permissions, Specialer, Codebook
- bonus
Same technique in picoCTF: Permissions, Specialer, Codebook
Forensics12
Recover something from a file, a capture, or a disk image - often from a part of it the format says is unused.
- forensics
Same technique in picoCTF: FindAndOpen, c0rrupt, extensions
- analysis
- traffic
Same technique in picoCTF: FindAndOpen, c0rrupt, extensions
- volatility
- forensics
- windows
Same technique in picoCTF: FindAndOpen, c0rrupt, extensions
- analysis
- traffic
Same technique in picoCTF: FindAndOpen, c0rrupt, extensions
- analysis
- traffic
Same technique in picoCTF: FindAndOpen, c0rrupt, extensions
- analysis
- traffic
Same technique in picoCTF: FindAndOpen, c0rrupt, extensions
- forensics
Same technique in picoCTF: FindAndOpen, c0rrupt, extensions
- analysis
- traffic
Same technique in picoCTF: FindAndOpen, c0rrupt, extensions
- analysis
- traffic
Same technique in picoCTF: FindAndOpen, c0rrupt, extensions
- analysis
- traffic
Same technique in picoCTF: FindAndOpen, c0rrupt, extensions
Evil Corps Child 1-3
1 writeup- traffic
Same technique in picoCTF: FindAndOpen, c0rrupt, extensions
- forensics
Same technique in picoCTF: FindAndOpen, c0rrupt, extensions
Web8
Reach data or functionality the application meant to keep from you - through its inputs, its tokens, or its trust in the client.
- sql
Same technique in picoCTF: Irish-Name-Repo 3, More SQLi, Secret Box
- sql
Same technique in picoCTF: Irish-Name-Repo 3, More SQLi, Secret Box
- sql
Same technique in picoCTF: Irish-Name-Repo 3, More SQLi, Secret Box
- sql
Same technique in picoCTF: Irish-Name-Repo 3, More SQLi, Secret Box
- sql
Same technique in picoCTF: Irish-Name-Repo 3, More SQLi, Secret Box
- sql
Same technique in picoCTF: Irish-Name-Repo 3, More SQLi, Secret Box
- sql
Same technique in picoCTF: Irish-Name-Repo 3, More SQLi, Secret Box
- web
Same technique in picoCTF: Client-side-again, dont-use-client-side, Irish-Name-Repo 3
Cryptography4
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.
- cryptography
Same technique in picoCTF: StegoRSA, Timestamped Secrets, AES-ABC
- crypto
- crytography
Same technique in picoCTF: Mod 26, New Caesar, credstuff
- cryptography
Same technique in picoCTF: StegoRSA, Timestamped Secrets, AES-ABC
- crypto
- des
Same technique in picoCTF: StegoRSA, Timestamped Secrets, AES-ABC
Steganography2
Find the payload hidden inside a carrier that looks ordinary. Bit planes, appended data, metadata, and audio spectrograms.
- steganography
Same technique in picoCTF: FindAndOpen, StegoRSA, Glory of the Garden
- stego
Same technique in picoCTF: FindAndOpen, StegoRSA, Glory of the Garden
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.
- shellcode
- forensics
Same technique in picoCTF: Binary Gauntlet 2, ropfu, solfire