Challenge list
Network SecurityLevel 3★★★☆☆Network Analysis - SSL Strip Clear-text Credentials
An SSL Strip attack downgraded HTTPS to HTTP, so the victim's credentials traveled in clear text and were captured.…
Network SecurityLevel 3★★★☆☆Network Analysis - Unmasking WebSocket Frames
capture.pcap records WebSocket traffic between a browser and a chat server. Every client-to-server frame is masked…
Network SecurityLevel 3★★★☆☆Network Analysis - Custom Protocol Decoding
Traffic from a system using a small custom binary protocol was captured. Download the packet capture (traffic.pcap),…
LinuxLevel 4★★★★☆Linux-Kernel Module. Gaining Root via a Vulnerable Driver
This challenge analyzes a vulnerable character-device driver as a safe user-space simulation. No real kernel module is…
LinuxLevel 4★★★★☆Linux-Buffer Overflow. Exploiting a gets() Vulnerability
A vulnerable SUID C binary with protections disabled is provided. Exploit its buffer overflow to redirect control flow…
Web SecurityLevel 4★★★★☆Web-26. Prototype Pollution in User Profile Manager
In this Node.js/Express app, a logged-in user can update their own profile. Check whether the recursive merge function…
Web SecurityLevel 4★★★★☆Web-27. GraphQL Introspection Leak
This GraphQL API exposes a schema of User objects with introspection enabled. Investigate whether undocumented queries…
Web SecurityLevel 4★★★★☆Web-28. Hijacking an OAuth Authorization Code
This OAuth 2.0 authorization provider offers a login flow, but its redirect_uri validation may be weak. Investigate…
Web SecurityLevel 4★★★★☆Web-29. NoSQL Injection in a MongoDB Login Form
This login portal is backed by MongoDB and builds its query directly from raw JSON username/password input.…
Web SecurityLevel 4★★★★☆Web-30. Insecure Deserialization in KinoVault
A legacy backup system codenamed KinoVault reportedly serializes user session objects with Python's pickle module and…
Network SecurityLevel 4★★★★☆Network Analysis - Rebuilding Chunked gzip HTTP from TCP
capture.pcap records two HTTP exchanges over one TCP connection. The server's segments are reordered and some are…
Network SecurityLevel 4★★★★☆Network Analysis - TCP Retransmission Covert Channel
capture.pcap contains TCP retransmissions with duplicate sequence numbers. Extract retransmissions whose payload…
LinuxLevel 5★★★★★Linux-eBPF Rootkit. Unmasking a Hidden Process
This challenge safely recreates eBPF-rootkit investigation as offline evidence analysis. Without loading eBPF, tell…
LinuxLevel 5★★★★★Linux-Kernel Exploit. Rewriting a Read-Only File with Dirty COW
This challenge models mmap, MAP_PRIVATE, and madvise—the ingredients used by Dirty COW (CVE-2016-5195)—as a safe,…
Network SecurityLevel 5★★★★★Network Analysis - IPv4 Overlapping Fragment Reassembly
The UDP datagram with IPv4 ID 0xbeef in fragments.pcap contains overlapping fragments that overwrite earlier bytes.…