题目先屯一份打完取证回来慢慢的复现~~
Reverse
i can count – 50pts
Let’s do this together. You do know how to count, don’t you?
The .Wat ness – 250pts
The .Wat ness is open for testing!
http://watness.pwni.ng:7744/
When it came out in 2016, the Witness impressed with its ability to gradually teach new players the rules of the game by simply having them play it. With the .Wat ness, we take this just a small step further.
Plaid Party Planning III – 500pts
This year, we’re having another party. We managed to come to a consensus to have Indian food, but I can’t figure out where everyone should sit. Can you help us make sure the dinner goes off without a hitch?
Plaid Party Planning III 2 – 500pts
This binary has a fix for an unintentional solution. Let’s keep the party going.
NOTE: We have pushed an updated binary. This update fixes a bug in the check function and should hopefully make the check function easier to understand. The diff with the binary below should be minimal. Apologies.
The previous Plaid Party Planning III 2 binary.
Hint: Admin contact
Please message strikeskids on IRC (#pctf on freenode) if you have a solution that should pass the check, but does not give a valid flag.
big maffs – 250 pts
Do you have enough memory? big_maffs
Crypto
SPlaid Cypress – 600pts
I came up with this carbon-neutral cryptosystem and hid my secrets in the forest. Can you help them find their way out?
R u SAd? – 150pts
Tears dripped from my face as I stood over the bathroom sink. Exposed again! The tears melted into thoughts, and an idea formed in my head. This will surely keep my secrets safe, once and for all. I crept back to my computer and began to type.
Horst – 200pts
They say 3 rounds is provably secure, right? Download
Misc
docker – 10pts
docker pull whowouldeverguessthis/public
Everland – 250pts
In a darkened land, a hero must fight for their flag! Source
running at everland.pwni.ng:7772
can you guess me – 100pts
Here’s the source to a guessing game: here
You can access the server at
nc canyouguessme.pwni.ng 12349
Space Saver – 100pts
we couldn’t think of anything cute so here you go
graffiti – 333pts
QUAAAAAKE
In lieu of a description, please watch this video. Alternate link
A Whaley Good Joke – 150pts
You’ll have a whale of a time with this one! I couldn’t decide what I wanted the flag to be so I alternated adding and removing stuff in waves until I got something that looked good. Can you dive right in and tell me what was so punny?
Project Eulernt – 200pts
Guys, guys, don’t fight. I’m sure we’ll be able to come up with something roughly equal.
source
eulernt.pwni.ng:5555
NOTE: We originally uploaded the wrong version. It is still available here if you really want it: wrong version.
Pwn
CPP – 150pts
C++ is hard.
cppp.pwni.ng 4444
binary, libc
Hint: Additional port
The service is now also running on cppp.pwni.ng:7777 for those ISPs that block egress to port 4444.
SPlaid Birch – 300pts
I make sure never to use
scanf(“%s”)
when doing competitive programming so that my solutions don’t have buffer overflows. But writing algorithms is hard.
files
splaid-birch.pwni.ng:17579
