#ctf

The capture contains a file transfer over the TFTP protocol (Trivial File Transfer Protocol)....

A .pcap file is provided. Filtering on the HTTP protocol and following the TCP stream (Follow → TCP...

The flag is XOR-encrypted with a short repeating key. Since we know every picoCTF flag starts with...

Unlike Caesar, each letter is replaced by a different letter according to an arbitrary mapping (not a...

The Caesar cipher has exactly 26 possible shifts (modulo the 26 letters of the alphabet). A Python...

The login form filters classic SQL keywords (spaces, OR, --) in an overly simplistic way. By varying...

Summary Olympus is a Linux box built around an old Victor CMS 1.0 install hidden under...

Summary CyberHeros is an easy-rated web challenge built on the iPortfolio Bootstrap...

The flag is split into 3 pieces hidden in comments: one in the page's HTML, one in the linked .js...

A PNG image contains a ZIP file hidden inside it. We detect it with binwalk, extract it, and the flag...

The site uses a name cookie to display different types of cookies (the food). By enumerating values...

User www-data may run the following commands on this host: (root) NOPASSWD: /usr/bin/find