Taipei - normal port knocking#

nmap -p- --min-rate=1000 -T4 localhost

Unimak - json parsing#

jq '.data.stations[] | select(.has_kiosk==false and .capacity>30) | .station_id' station_information.json > ~/mysolution

Ivujivik - csv parsing#

find out the row first run without try - error - and catch it

import csv

max_rejected = 0
max_district = ""

with open("table_tableau11.csv") as f:
    reader = csv.reader(f)
    next(reader)  # skip header

    for row in reader:
        name = row[1]
        try:
            rejected = int(row[8])
        except ValueError:
            print(f"Could not convert rejected ballots to int for district {name}")
            rejected = 0
        population = int(row[3])

        if population < 100000 and rejected > max_rejected:
            max_rejected = rejected
            max_district = name

print(max_district)

Monaco#

# - get the POST field
curl localhost:5000
# format with 
curl -X POST -F 'password=PASSWORD' http://localhost:5000/
git restore ./

cat webserver.py
#locate the password location

ps aux | grep python

# find the pid

cat /proc/1234/environ | grep SUPERSECRETPASSWORD

get the env 

format and post it

pretty cool about /proc tricks. you can even see a background progress stderr/stdout with cat /proc/1444/fd/{1,2}

Chennai#

pretty rough. read the repo read .env docker-compose not present, convert the docker-compose to docker commands

# Create rabbitmq1 container
docker run -d  --network my-network  --hostname rabbitmq1 --env RABBITMQ_DEFAULT_USER=guest --env RABBITMQ_DEFAULT_PASS=guest --env RABBITMQ_DEFAULT_VHOST=/ --volume ./.erlang.cookie:/var/lib/rabbitmq/.erlang.cookie --volume ./cluster-entrypoint.sh:/usr/local/bin/cluster-entrypoint.sh --entrypoint /usr/local/bin/cluster-entrypoint.sh rabbitmq:3-management

# Create rabbitmq2 container 
docker run -d  --network my-network  --hostname rabbitmq2 --env JOIN_CLUSTER_HOST=rabbitmq1 --volume ./.erlang.cookie:/var/lib/rabbitmq/.erlang.cookie --volume ./cluster-entrypoint.sh:/usr/local/bin/cluster-entrypoint.sh --entrypoint /usr/local/bin/cluster-entrypoint.sh rabbitmq:3-management

# Create rabbitmq3 container
docker run -d  --network my-network  --hostname rabbitmq3 --env JOIN_CLUSTER_HOST=rabbitmq1 --volume ./.erlang.cookie:/var/lib/rabbitmq/.erlang.cookie --volume ./cluster-entrypoint.sh:/usr/local/bin/cluster-entrypoint.sh --entrypoint /usr/local/bin/cluster-entrypoint.sh rabbitmq:3-management

# Create haproxy container
docker run -d  --network my-network  --volume ./haproxy.cfg:/usr/local/etc/haproxy/haproxy.cfg:ro  -p 15672:15672 -p 5672:5672 haproxy:1.7

it doesnt really run, investigate(docker logs -f) and find out entrance.sh error give it something random to loop (how to make it easier) haproxy not finding the mq1 mq2 mq3

• docker create network. docker network create my-network
• adding --network my-network to the docker command
• the producer doesnt run

pika.exceptions.IncompatibleProtocolError: StreamLostError: (‘Transport indicated EOF’,)

because the channel is empty - reading - it takes the channel from ENV

RMQ_QUEUE="hello" python3 producer.py

# works

export RMQ_QUEUE="hello" 

the consumer doesnt run - error auth

pika.exceptions.ProbableAuthenticationError: ConnectionClosedByBroker: (403) ‘ACCESS_REFUSED - Login was refused using authentication mechanism PLAIN. For details see the broker logfile.’

adding a user for it

docker exec -it 6414fa8a1402 rabbitmqctl add_user username password

#and set up proper vhost perm for it
docker exec -it 6414fa8a1402 rabbitmqctl set_permissions -p "/" username ".*" ".*" ".*"