Scenario: "Geneva": Renew an SSL Certificate

Level: Easy

Type: Fix

Access: Email

Description: There's an Nginx web server running on this machine, configured to serve a simple "Hello, World!" page over HTTPS. However, the SSL certificate is expired.

Create a new SSL certificate for the Nginx web server with the same Issuer and Subject (same domain and company information).

Test: Certificate should not be expired: echo | openssl s_client -connect localhost:443 2>/dev/null | openssl x509 -noout -dates and the subject of the certificate should be the same as the original one: echo | openssl s_client -connect localhost:443 2>/dev/null | openssl x509 -noout -subject

The "Check My Solution" button runs the script /home/admin/agent/check.sh, which you can see and execute

Time to Solve: 10 minutes.

Scenario: "Lisbon": etcd SSL cert troubles

Level: Medium

Type: Fix

Access: Email

Description: There's an etcd server running on https://localhost:2379 , get the value for the key "foo", ie etcdctl get foo or curl https://localhost:2379/v2/keys/foo

Test: etcdctl get foo returns bar.

Time to Solve: 20 minutes.

Scenario: "Moyogalpa": Security Snag. The Trials of Mary and John

Level: Medium

Type: Fix

Access: Email

Description: Mary and John are working on a Golang web application, and the security team has asked them to implement security measures. Unfortunately, they have broken the application, and it no longer functions. They need your help to fix it.

The fixed application should be able to allow clients to communicate with the application over HTTPS without ignoring any checks. (eg: curl https://webapp:7000/users.html) and serve its static files.

Test: curl https://webapp:7000/users.html should return the content of file.

The "Check My Solution" button runs the script /home/admin/agent/check.sh, which you can see and execute.

Time to Solve: 30 minutes.