Unix
Can you read the file?
You can connect to the challenge with the credentials ctf:ctf
ssh ctf@challs.studsec.nl -p2222
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Stack
J.R Overwrite recently died, can you bend his final program to your will?
Credit: VUBar (barbito)
nc challs.studsec.nl 9200
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Can you print the flag?
nc challs.studsec.nl 9400
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Can you break our URL builder?
Credit: VUBar (barbito)
nc challs.studsec.nl 9300
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Character encodings are hard, but surely it can't be that hard right? Right?
Credit: Yannik
nc challs.studsec.nl 9600
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Integers
NFT's seem to be all the rage, can you beat the market?
Credit: VUBar (barbito)
nc challs.studsec.nl 9100
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PWN
The art of exploiting a computer program on the lower level.
The aliens have created a propoganda machine in order to demotivate our troops please help us deal with it.
From VU-CTF 2024
nc challs.studsec.nl 9700
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The aliens have created a poor password generator system can you help us exploit it.
From VU-CTF 2024
nc challs.studsec.nl 9900
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If you have played CTF before, you have probably come across a stack overflow. Do you also have the skill to write exploits for other architectures than x86? This can be useful if you want to write exploits for Wii / Wii U games ... or certain alien systems.
From VU-CTF 2024
nc challs.studsec.nl 9800
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Heap
Have You Tried Turning It Off And On Again? No fear, the admin is here to help you with all your tech problems.
Credit: Rick de Jager & Per Schrijver
nc challs.studsec.nl 9500
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