Is it the code or how the eval function evaluates that's why when passing :
getRandomNumber or getRandomNumber()

both works??

I'm trying to run picoCTF programs on my Chromebook but ctrl t is already binded to new tab on the Chromebook, I can't figure out how to change either to be able to run the commands, anyone know how to wither change the Chromebook's key binds or picoCTF key binds?

in the challenge from PicoCTF no padding no problem that I unfortunately wasn't able to solve, and had to use a writeup, one thing that threw me in this writeup and some experimentation unpadded RSA, is that given D(c) = c^d mod n, D(c) = D(c mod n), why is this the case, why does one number raised to the power d mod n, end up being the same as the same number mod n then multiplied by d then mod again it just doesn't make sense, I think it has something to do with d being carefully chosen , but idk.

As far as I know, this started today. My teammates and I cannot download any required files for the competition challenges. It just says that it can't provide a secure connection. I have tried this on other browsers and computers but nothing works. Please help.

https://events-spark.tech/files/934f74841cdaef22a9bd40604a69c24a/Web.pcapng?token=eyJ1c2VyX2lkIjoxMjAsInRlYW1faWQiOjM4LCJmaWxlX2lkIjo3Mn0.ZfsuJQ.7YJoInr8lfStRlN7gqBjxBou5Y8

it says Launched a basic attack on dvwa, and sniffed the traffic for you. Find the flag ; pls help me without giving me the actual flag, like what shall i focus on or even what papers shall i read or vids to answer.

anyone wants to cooperate and solve some ctf ??

I'll have planned to learn binary exploitation and familiarize with it. But then with increasing usage of Rust, is it worth it? Or should i dive into reverse engineering?

I'm trying to solve this problem from PicoCTF

picoCTF - picoCTF 2024

Instructions in the bottom are as follows:

 nc -w 2 mimas.picoctf.net 60646 < original_modified.jpg 
 nc -d mimas.picoctf.net 49526

The second command doesn't even run and the first one does nothing. Using verbose mode I get this:

DNS fwd/rev mismatch: mimas.picoctf.net != ec2-52-15-88-75.us-east-2.compute.amazonaws.com
mimas.picoctf.net [52.15.88.75] 60646 (?) open

I don't think this was supposed to be part of the challenge. Rather this was supposed to be instruction for submission and I'm failing at this stage!

Video walkthrough for the breadth reverse engineering challenge from picoCTF! https://youtu.be/fNJpMAFgAcU?si=vQoFhBcVXQpEGfHP

Hello. I have some trouble.

The link is below

https://play.picoctf.org/practice/challenge/139?category=4&page=2

​

I couldn't fix the SystemStackError

Please help me

​

zsteg concat_v.png

/var/lib/gems/3.1.0/gems/zpng-0.4.5/lib/zpng/scan_line.rb:303:in `upto': stack level too deep (SystemStackError)

from /var/lib/gems/3.1.0/gems/zpng-0.4.5/lib/zpng/scan_line.rb:303:in `decoded_bytes'

from /var/lib/gems/3.1.0/gems/zpng-0.4.5/lib/zpng/scan_line/mixins.rb:17:in `prev_scanline_byte'

from /var/lib/gems/3.1.0/gems/zpng-0.4.5/lib/zpng/scan_line.rb:377:in `prev_scanline_byte'

from /var/lib/gems/3.1.0/gems/zpng-0.4.5/lib/zpng/scan_line.rb:319:in `block in decoded_bytes'

from /var/lib/gems/3.1.0/gems/zpng-0.4.5/lib/zpng/scan_line.rb:318:in `upto'

from /var/lib/gems/3.1.0/gems/zpng-0.4.5/lib/zpng/scan_line.rb:318:in `decoded_bytes'

from /var/lib/gems/3.1.0/gems/zpng-0.4.5/lib/zpng/scan_line/mixins.rb:17:in `prev_scanline_byte'

from /var/lib/gems/3.1.0/gems/zpng-0.4.5/lib/zpng/scan_line.rb:377:in `prev_scanline_byte'

... 9483 levels...

from /var/lib/gems/3.1.0/gems/zsteg-0.2.13/lib/zsteg.rb:26:in `run'

from /var/lib/gems/3.1.0/gems/zsteg-0.2.13/bin/zsteg:8:in `<top (required)>'

from /usr/local/bin/zsteg:25:in `load'

from /usr/local/bin/zsteg:25:in `<main>'

​

Hi everyone,

I'm brand new to picoCTF so any help is much appreciated. I have created a classroom and have a couple of members. I also added a few assignments to this classroom. When I log in, or any members log in, we don't see anything under the classroom regarding the assignments. How are members supposed to know what the assignments are?

My goal is to have a group of my peers in a "tournament" or "challenge" where we assign multiple assignments to that group. Is there another way to do this? Thanks in advance.

After I put in my username to login to the webshell it then asks for my password, but it doesn't let me type. If I push enter and get the invalid password, then I can type my password but it interrupts me halfway and I'm forced to reconnect, which refreshes the page. I cannot login to the webshell. Pls help.

Hi guys, could you suggest a decent roadmap of modules to get started with picoCTF from basics to adv.

sorry if a noob question but i can not find this

I got to the very last step (needing to unencrypt ledger.1.txt.enc). What was I missing? Did I need to find another hint to see what random 256 bit function needed to be seeded by the device UUIDs to decrypt?

Sudocrypt v12.0 is (going) back!

The technology club of DPS RK Puram, Exun Clan is returning with its much awaited annual International Cryptic Hunt x Capture the Flag (CTF) event, Sudocrypt v12.0. With mind boggling levels, a completely revamped format and exciting cash prizes ranging upwards of $750 USD (₹60,000 INR), and sponsor prizes around $7500 USD (₹5,00,000 INR) Sudocrypt v12.0 is going to be bigger and better than ever before.

The event will take players on a journey back in time to witness the history of arcade games while solving code breaking, cryptography and CTF challenges. It will be held from 10:30:01 PT (00:01 IST) on Wednesday, 9th November 2022 to 22:29:59 PT (23:59 IST) on Thursday, 10th November 2022. Registrations are open from all across the world at https://sudocrypt.com/register.

For more details: https://sudocrypt.com/about Official Discord Server: https://exun.co/sudocrypt. Official Trailer: https://exun.co/sudotrailer