Tamil CTF 2021
44 challenges with 84 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 CTFtimeUncategorised13
The upstream scoreboard did not say, so neither do we.
Insecure System
3 official solutionsAlso written up in: vital-information-resource-under-siege/PWN-Challenges, vital-information-resource-under-siege/PWN-Challenges, vital-information-resource-under-siege/PWN-Challenges
Vuln Storage
3 official solutionsAlso written up in: vital-information-resource-under-siege/PWN-Challenges, vital-information-resource-under-siege/PWN-Challenges, vital-information-resource-under-siege/PWN-Challenges
No Output
2 official solutionsAlso written up in: vital-information-resource-under-siege/PWN-Challenges, vital-information-resource-under-siege/PWN-Challenges
Overflow Me
2 official solutionsAlso written up in: 0xrakesh/tamilctf2021-writeups, 0xrakesh/tamilctf2021-writeups
Akka University
1 official solutionAlso written up in: an0n4ce/CTF-Write-Ups
Akka university exploit
1 official solutionAlso written up in: vital-information-resource-under-siege/PWN-Challenges
Choco Cookies
1 official solutionAlso written up in: an0n4ce/CTF-Write-Ups
Corrupt Pannitaanga Karna
1 official solutionAlso written up in: an0n4ce/CTF-Write-Ups
GitHub
1 official solutionAlso written up in: an0n4ce/CTF-Write-Ups
GoodBook
1 official solutionAlso written up in: an0n4ce/CTF-Write-Ups
House Of Einherjar
1 official solutionAlso written up in: vital-information-resource-under-siege/PWN-Challenges
Poison Null Byte
1 official solutionAlso written up in: vital-information-resource-under-siege/PWN-Challenges
RevEng
1 official solutionAlso written up in: 0xrakesh/tamilctf2021-writeups
Cryptography7
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.
- aes
- crypto
- xor
Same technique in picoCTF: AES-ABC, Compress and Attack, Custom encryption
- basecrack
- crypto
Same technique in picoCTF: It's Not My Fault 2, StegoRSA, AES-ABC
- crypto
- rsa
Same technique in picoCTF: It's Not My Fault 2, StegoRSA, john_pollard
Chall3 A35
1 official solutionAlso written up in: OxOv3rH4uL/Tamil-CTF-2021
- aes-ecb
- crypto
Same technique in picoCTF: AES-ABC, Compress and Attack, cryptomaze
- shamir
- crypto
Same technique in picoCTF: It's Not My Fault 2, StegoRSA, AES-ABC
- 3des
- crypto
Same technique in picoCTF: It's Not My Fault 2, StegoRSA, AES-ABC
Web6
Reach data or functionality the application meant to keep from you - through its inputs, its tokens, or its trust in the client.
Also written up in: apostolides/ctf-writeups
- web
Same technique in picoCTF: Live Art, secure-email-service, No FA
Also written up in: apostolides/ctf-writeups, ZhaoQi99/CTF-Writeups, ZhaoQi99/CTF-Writeups
- ssti
- web
- web
Same technique in picoCTF: Live Art, secure-email-service, No FA
- web
Same technique in picoCTF: Live Art, secure-email-service, No FA
- web
Same technique in picoCTF: Live Art, secure-email-service, No FA
- xxe
- web
- sqli
Same technique in picoCTF: Irish-Name-Repo 3, Startup Company, More SQLi
Reverse engineering6
Work out what a compiled program does without its source, then work backwards from the check to the input that passes it.
Also written up in: goseungduk/CTF_WriteUp, goseungduk/CTF_WriteUp
- reverse
Same technique in picoCTF: Checkpass, WinAntiDbg0x100, WinAntiDbg0x200
Also written up in: goseungduk/CTF_WriteUp, goseungduk/CTF_WriteUp
- reversing
Same technique in picoCTF: Checkpass, WinAntiDbg0x100, WinAntiDbg0x200
Also written up in: goseungduk/CTF_WriteUp, goseungduk/CTF_WriteUp
- reversing
Same technique in picoCTF: Checkpass, WinAntiDbg0x100, WinAntiDbg0x200
Also written up in: goseungduk/CTF_WriteUp, goseungduk/CTF_WriteUp
- reversing
Same technique in picoCTF: Checkpass, WinAntiDbg0x100, WinAntiDbg0x200
- reverse
Same technique in picoCTF: Checkpass, WinAntiDbg0x100, WinAntiDbg0x200
- mobile
- reversing
- android
Binary exploitation5
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: nobodyisnobody/write-ups, vital-information-resource-under-siege/PWN-Challenges, vital-information-resource-under-siege/PWN-Challenges, vital-information-resource-under-siege/PWN-Challenges
- pwn
- heap
Same technique in picoCTF: vr-school, sice_cream, zero_to_hero
Working.Exploit
4 official solutionsAlso written up in: nobodyisnobody/write-ups, nobodyisnobody/write-ups, nobodyisnobody/write-ups, nobodyisnobody/write-ups
Also written up in: nobodyisnobody/write-ups
- sigrop
- pwn
Same technique in picoCTF: lockdown-horses, Guessing Game 1, vr-school
- ropchain
- pwn
Same technique in picoCTF: lockdown-horses, Guessing Game 1, vr-school
Also written up in: CamelRiders/CTF-Writeups
Forensics5
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: investigation_encoded_2, FindAndOpen, Ph4nt0m 1ntrud3r
Also written up in: EvilBunnyWrote/Write-ups
- forensics
Same technique in picoCTF: investigation_encoded_2, FindAndOpen, Ph4nt0m 1ntrud3r
Also written up in: goseungduk/CTF_WriteUp
- forensics
Same technique in picoCTF: investigation_encoded_2, FindAndOpen, Ph4nt0m 1ntrud3r
- forensics
Same technique in picoCTF: investigation_encoded_2, FindAndOpen, Ph4nt0m 1ntrud3r
Stefanofraphy
1 official solutionAlso written up in: OxOv3rH4uL/Tamil-CTF-2021
Misc1
Everything that fits no other box: esolangs, puzzles, scripting exercises, and the jail escapes that have not yet earned their own category.
- misc
- drawing
Same technique in picoCTF: PW Crack 2, Permissions, Specialer
OSINT1
Answer a question about the real world from public sources. The work is pivoting between identifiers, not exploiting anything.
- osint
Same technique in picoCTF: CVE-XXXX-XXXX