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PlaidCTF 2014 parlor writeup

The Plague is running a betting service to build up funds for his massive empire. Can you figure out a way to beat the house? The service is running at 54.197.195.247:4321.

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PlaidCTF 2014 __nightmares__ writeup

The Plague is building an army of evil hackers, and they are starting off by teaching them python with this simple service. Maybe if you could get full access to this system, at 54.196.37.47:9990, you would be able to find out more about The Plague’s evil plans. Code: (can be run locally with $ socat …

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PlaidCTF 2014 RSA writeup

Our archaeologists recovered a dusty and corrupted old hard drive used by The Plague in his trips into the past. It contains a private key, but this has long since been lost to bitrot. Can you recover the full key from the little information we have recovered?

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Boston Key Party CTF – Differential Power (Crypto 400)

we hooked up a power meter to this encryption box. we don’t know the key. that’s what we want to know. you can encrypt any string of 8 characters on the service http://54.218.22.41:6969/string_to_encrypt encrypt.asm chall source (released after ctf)

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Codegate 2014 Quals – Angry Doraemon (pwn 250)

□ description ========================================== OS : Ubuntu 13.10 x86 IP : 58.229.183.18 / TCP 8888 http://58.229.183.26/files/angry_doraemon_c927b1681064f78612ce78f6b93c14d9 ========================================== □ number of solvers : 57 □ breakthrough by 1 : More Smoked Leet Chicken (02/23 06:16) 2 : ppp (02/23 06:22) 3 : stratumauhuur (02/23 06:28) Binary

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Codegate 2014 Quals – Minibomb (pwn 400)

□ description ========================================== ssh guest@58.229.183.14 / ExtremelyDangerousGuest ssh guest@58.229.183.15 / ExtremelyDangerousGuest ========================================== □ number of solvers : 15 □ breakthrough by 1 : More Smoked Leet Chicken (02/23 02:38) 2 : Hexcellents (02/23 02:42) 3 : ppp (02/23 03:16) Binary

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Olympic CTF 2014 GuessGame (300)

Be careful, it’s cheating! nc 109.233.61.11 3126 Summary: discrete logarithm with group oracle

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Olympic CTF Sochi 2014 Registration is Open

Let there be Olympics MSLC proudly presents…Alright, do we even need words here? Game starts: February 7th, 2014 16:14 UTC (yeah yeah, those Sochi number freaks… it’s 20:14 in MSK timezone) Game ends: February 9th, 2014 16:14 UTC Sign up: https://olympic-ctf.ru/ Prize set: 1500 USD, 1000 USD, 500 USD. Expect decent tasks. Twenty of them.

Sudden CTF syndrome

Happy new 2014 and merry Orthodox Christmas if you’re religious ;-D Maybe you already know hack you and hack you too, so I won’t even say that hack you is an individual CTF that we originally held for our university freshmen and opened it for everyone interested in the world. Couple days after this New …

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GITS 2014 Teaser – PPC

Find the key. (File) PPC running at ppc.2014.ghostintheshellcode.com:10000. Summary: format string vuln, communication via qrcodes

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RuCTFe rocks, iCTF is fine, rwthCTF are assholes

The traditional Winter Attack-Defense Spree is over, and what can I say…

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Hack.lu 2013 CTF – Crypto 350 (BREW’r’Y)

BREW’r’Y (Category: Crypto) Author(s): dwuid Finally, the robots managed to sneak into one of our breweries. I guess I won’t have to explain how bad that really is. That darn non-physical ones even shutdown our login system. Shiny thing, advanced technology, all based on fingerprints. Been secure as hell. If only it was running. Well, …

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Defcon CTF Quals 2013 – \xff\xe4\xcc 4 (penser)

good luck. penser.shallweplayaga.me:8273 http://assets-2013.legitbs.net/liabilities/penser Download penser binary » Summary: x86_64 Unicode-proof shellcoding.

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Defcon CTF Quals 2013 – \xff\xe4\xcc 3 (linked)

typedef struct _llist { struct _llist *next; uint32_t tag; char data[100]; llist; and: register char *answer; char *(*func)(); llist *head; … func = (char *(*)(llist *))userBuf; answer = (char *)(*func)(head); send_string(answer); exit(0); Write me shellcode that traverses the randomly generated linked list, looking for a node with a tag 0x41414100, and returns a pointer to …

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Defcon CTF Quals 2013 – All Web Challenges (3dub)

Summary: 3dub (1) – babysfirst: SQLite SQL injection 3dub (2) – badmedicine: Stream cipher bit flipping 3dub (3) – hypeman: Rack/Sinatra session secret disclosure 3dub (4) – rememberme: Bruteforce 3dub (5) – worsemedicine: Block cipher bit flipping

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