Cybersecurity Challenge 2025
9 challenges with 9 published solutions between them. The writeups for this event were found in public repositories. Each link is pinned to the commit it was read from.
Where these writeups liveBinary exploitation3
Turn a memory-safety bug in a native binary into control of execution. Usually a stack overflow, a format string, or a heap primitive.
Abnormal
1 official solutionAlso written up in: 8-4-9-0/writeups-event
Here are GOT and PLT
1 official solutionAlso written up in: 8-4-9-0/writeups-event
Also written up in: 8-4-9-0/writeups-event
Misc3
Everything that fits no other box: esolangs, puzzles, scripting exercises, and the jail escapes that have not yet earned their own category.
HiddenService
1 official solutionAlso written up in: 8-4-9-0/writeups-event
Also written up in: 8-4-9-0/writeups-event
Salted Hash Hunt
1 official solutionAlso written up in: 8-4-9-0/writeups-event
Uncategorised2
The upstream scoreboard did not say, so neither do we.
Acrobatics
1 official solutionAlso written up in: 8-4-9-0/writeups-event
CustomEncryptor
1 official solutionAlso written up in: 8-4-9-0/writeups-event
Web1
Reach data or functionality the application meant to keep from you - through its inputs, its tokens, or its trust in the client.
Secure Web Company
1 official solutionAlso written up in: 8-4-9-0/writeups-event