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Intro to Programming Languages

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Cat

Time of First Successful Submission: 2026-03-21 05:42:21

Intro to Cybersecurity

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Path Traversal 1

Time of First Successful Submission: 2026-03-10 01:20:54

Path Traversal 2

Time of First Successful Submission: 2026-03-10 01:33:22

CMDi 1

Time of First Successful Submission: 2026-03-10 01:38:03

CMDi 2

Time of First Successful Submission: 2026-03-10 01:40:23

CMDi 3

Time of First Successful Submission: 2026-03-10 01:46:36

CMDi 4

Time of First Successful Submission: 2026-03-10 01:52:05

CMDi 5

Time of First Successful Submission: 2026-03-10 01:55:15

CMDi 6

Time of First Successful Submission: 2026-03-10 02:48:10

Authentication Bypass 1

Time of First Successful Submission: 2026-03-10 04:04:47

Authentication Bypass 2

Time of First Successful Submission: 2026-03-10 04:09:43

SQLi 1

Time of First Successful Submission: 2026-03-10 04:16:37

SQLi 2

Time of First Successful Submission: 2026-03-10 04:23:10

SQLi 3

Time of First Successful Submission: 2026-03-10 04:26:42

SQLi 4

Time of First Successful Submission: 2026-03-10 04:30:19

SQLi 5

Time of First Successful Submission: 2026-03-10 05:21:08

XSS 1

Time of First Successful Submission: 2026-03-10 08:42:47

XSS 2

Time of First Successful Submission: 2026-03-10 08:47:21

XSS 3

Time of First Successful Submission: 2026-03-10 08:56:15

XSS 4

Time of First Successful Submission: 2026-03-10 09:00:53

XSS 5

Time of First Successful Submission: 2026-03-10 13:32:01

XSS 6

Time of First Successful Submission: 2026-03-10 13:46:39

XSS 7

Time of First Successful Submission: 2026-03-10 13:53:15

CSRF 1

Time of First Successful Submission: 2026-03-11 14:24:56

CSRF 2

Time of First Successful Submission: 2026-03-11 14:48:11

CSRF 3

Time of First Successful Submission: 2026-03-12 00:48:43

CSRF 4

Time of First Successful Submission: 2026-03-12 00:57:37

CSRF 5

Time of First Successful Submission: 2026-03-12 01:09:31

Connect

Time of First Successful Submission: 2026-03-12 01:15:33

Send

Time of First Successful Submission: 2026-03-12 10:26:23

Shutdown

Time of First Successful Submission: 2026-03-12 10:31:45

Listen

Time of First Successful Submission: 2026-03-12 10:35:58

Scan 1

Time of First Successful Submission: 2026-03-12 10:37:47

Scan 2

Time of First Successful Submission: 2026-03-14 06:03:43

Monitor 1

Time of First Successful Submission: 2026-03-16 01:28:35

Monitor 2

Time of First Successful Submission: 2026-03-19 02:40:31

Sniffing Cookies

Time of First Successful Submission: 2026-03-19 12:00:35

Network Configuration

Time of First Successful Submission: 2026-03-21 06:06:11

Firewall 1

Time of First Successful Submission: 2026-03-21 06:35:07

Firewall 2

Time of First Successful Submission: 2026-03-21 06:41:00

Firewall 3

Time of First Successful Submission: 2026-03-21 07:01:33

Denial of Service 1

Time of First Successful Submission: 2026-03-21 07:03:09

Denial of Service 2

Time of First Successful Submission: 2026-03-21 07:05:29

Denial of Service 3

Time of First Successful Submission: 2026-03-21 10:29:13

Ethernet

Time of First Successful Submission: 2026-03-22 09:49:40

IP

Time of First Successful Submission: 2026-03-24 14:55:21

TCP

Time of First Successful Submission: 2026-03-25 08:26:12

TCP Handshake

Time of First Successful Submission: 2026-03-25 08:57:01

Start Here

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Using the Terminal

Time of First Successful Submission: 2026-02-23 15:22:07

Using the VSCode Workspace

Time of First Successful Submission: 2026-02-23 15:26:05

Using the GUI Desktop

Time of First Successful Submission: 2026-02-23 15:28:18

Pasting into the Desktop

Time of First Successful Submission: 2026-02-23 15:30:27

Restarting Challenges

Time of First Successful Submission: 2026-02-23 15:35:21

Challenge Programs

Time of First Successful Submission: 2026-02-23 15:36:55

The Flag File

Time of First Successful Submission: 2026-02-23 15:39:03

Using Privileged Mode

Time of First Successful Submission: 2026-02-23 15:42:51

Persistent Home Directories - One

Time of First Successful Submission: 2026-02-23 15:45:45

Persistent Home Directories - Two

Time of First Successful Submission: 2026-02-23 15:46:32

Linux Luminarium

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cat: not the pet, but the command!

Time of First Successful Submission: 2026-03-21 05:42:21

catting absolute paths

Time of First Successful Submission: 2026-03-21 05:43:41

more catting practice

Time of First Successful Submission: 2026-03-21 05:49:18

grepping for a needle in a haystack

Time of First Successful Submission: 2026-03-21 05:49:40

comparing files

Time of First Successful Submission: 2026-03-21 05:50:50

Computing 101

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Your First Register

Time of First Successful Submission: 2026-02-24 00:50:43

Your First Syscall

Time of First Successful Submission: 2026-02-24 13:59:42

Exit Codes

Time of First Successful Submission: 2026-02-24 14:01:43

Building Executables

Time of First Successful Submission: 2026-02-24 14:07:31

Moving Between Registers

Time of First Successful Submission: 2026-02-24 14:11:10

Loading From Memory

Time of First Successful Submission: 2026-02-25 00:13:23

More Loading Practice

Time of First Successful Submission: 2026-02-25 00:16:52

Dereferencing Pointers

Time of First Successful Submission: 2026-02-25 00:20:11

Dereferencing Yourself

Time of First Successful Submission: 2026-02-25 00:22:28

Dereferencing with Offsets

Time of First Successful Submission: 2026-02-25 12:59:14

Stored Addresses

Time of First Successful Submission: 2026-02-25 13:09:03

Double Dereference

Time of First Successful Submission: 2026-02-25 13:06:10

The Stack

Time of First Successful Submission: 2026-02-25 13:11:41

Stack Offsets

Time of First Successful Submission: 2026-02-25 13:12:41

Program Arguments on the Stack

Time of First Successful Submission: 2026-02-25 13:16:04

Popping From the Stack

Time of First Successful Submission: 2026-02-25 13:17:59

Disassembling Programs

Time of First Successful Submission: 2026-02-25 13:28:59

Tracing Syscalls

Time of First Successful Submission: 2026-02-26 13:51:46

Starting GDB

Time of First Successful Submission: 2026-02-26 13:53:08

Quitting GDB

Time of First Successful Submission: 2026-02-26 13:55:14

Starting Programs in GDB

Time of First Successful Submission: 2026-02-26 13:57:21

Disassembling in GDB

Time of First Successful Submission: 2026-02-26 13:58:22

Stepping Through Instructions

Time of First Successful Submission: 2026-02-26 14:00:47

Reading Register Values

Time of First Successful Submission: 2026-02-26 14:01:45

Popping Stack Values

Time of First Successful Submission: 2026-02-26 14:03:27

Examining Memory

Time of First Successful Submission: 2026-02-26 14:05:01

Examining Stack Pointers

Time of First Successful Submission: 2026-02-26 14:08:37

Cooperative Debugging

Time of First Successful Submission: 2026-02-26 14:23:58

Writing Output

Time of First Successful Submission: 2026-02-27 04:51:30

Chaining Syscalls

Time of First Successful Submission: 2026-02-27 04:53:39

Writing Strings

Time of First Successful Submission: 2026-02-27 04:55:35

Reading Data

Time of First Successful Submission: 2026-02-27 04:59:38

Opening Files

Time of First Successful Submission: 2026-02-27 05:02:57

Hardcoding the Filename

Time of First Successful Submission: 2026-02-27 05:09:36

Comparing Values

Time of First Successful Submission: 2026-02-28 03:04:52

Comparing Characters

Time of First Successful Submission: 2026-02-28 03:24:24

Conditional Control Flow

Time of First Successful Submission: 2026-02-28 03:30:27

Comparing Strings

Time of First Successful Submission: 2026-02-28 03:34:04

Reverse the Password

Time of First Successful Submission: 2026-02-28 09:10:11

Conditionals Without Conditionals

Time of First Successful Submission: 2026-02-28 10:03:45

Looping

Time of First Successful Submission: 2026-02-28 10:08:11

Reverse the Calculation

Time of First Successful Submission: 2026-02-28 14:11:17

Reverse the Reverse

Time of First Successful Submission: 2026-02-28 14:12:37

Dealing with Bitwise Operations

Time of First Successful Submission: 2026-02-28 14:15:33

Loops on Data

Time of First Successful Submission: 2026-02-28 14:17:45

set-register

Time of First Successful Submission: 2026-03-01 00:36:06

set-multiple-registers

Time of First Successful Submission: 2026-03-01 00:37:24

add-to-register

Time of First Successful Submission: 2026-03-01 00:40:17

linear-equation-registers

Time of First Successful Submission: 2026-03-01 00:41:51

integer-division

Time of First Successful Submission: 2026-03-01 01:03:50

modulo-operation

Time of First Successful Submission: 2026-03-01 01:08:07

set-upper-byte

Time of First Successful Submission: 2026-03-01 07:34:34

efficient-modulo

Time of First Successful Submission: 2026-03-01 07:37:07

byte-extraction

Time of First Successful Submission: 2026-03-01 07:40:37

bitwise-and

Time of First Successful Submission: 2026-03-01 07:42:27

check-even

Time of First Successful Submission: 2026-03-01 08:18:57

memory-read

Time of First Successful Submission: 2026-03-01 08:21:21

memory-write

Time of First Successful Submission: 2026-03-01 08:22:58

memory-increment

Time of First Successful Submission: 2026-03-01 08:26:46

byte-access

Time of First Successful Submission: 2026-03-01 08:29:07

memory-size-access

Time of First Successful Submission: 2026-03-01 08:31:13

little-endian-write

Time of First Successful Submission: 2026-03-01 10:34:58

memory-sum

Time of First Successful Submission: 2026-03-01 10:41:55

stack-subtraction

Time of First Successful Submission: 2026-03-01 11:05:18

swap-stack-values

Time of First Successful Submission: 2026-03-01 11:06:02

average-stack-values

Time of First Successful Submission: 2026-03-01 11:08:03

absolute-jump

Time of First Successful Submission: 2026-03-01 11:09:31

relative-jump

Time of First Successful Submission: 2026-03-01 11:14:39

jump-trampoline

Time of First Successful Submission: 2026-03-01 11:17:36

conditional-jump

Time of First Successful Submission: 2026-03-01 11:54:06

indirect-jump

Time of First Successful Submission: 2026-03-02 13:02:42

average-loop

Time of First Successful Submission: 2026-03-02 13:08:07

count-non-zero

Time of First Successful Submission: 2026-03-02 13:15:11

string-lower

Time of First Successful Submission: 2026-03-03 13:56:59

most-common-byte

Time of First Successful Submission: 2026-03-04 14:33:41

Exit

Time of First Successful Submission: 2026-03-06 00:16:05

Socket

Time of First Successful Submission: 2026-03-06 12:15:03

Bind

Time of First Successful Submission: 2026-03-06 12:53:59

Listen

Time of First Successful Submission: 2026-03-06 13:00:16

Accept

Time of First Successful Submission: 2026-03-06 13:10:38

Static Response

Time of First Successful Submission: 2026-03-06 13:23:06

Dynamic Response

Time of First Successful Submission: 2026-03-06 13:39:40

Iterative GET Server

Time of First Successful Submission: 2026-03-06 13:44:51

Concurrent GET Server

Time of First Successful Submission: 2026-03-06 13:54:19

Concurrent POST Server

Time of First Successful Submission: 2026-03-06 16:15:45

Web Server

Time of First Successful Submission: 2026-03-06 16:31:15

Debugging Programs

Time of First Successful Submission: 2026-03-07 02:14:14

Inspecting Registers

Time of First Successful Submission: 2026-03-07 02:17:11

Examining Memory

Time of First Successful Submission: 2026-03-07 02:23:53

Setting Breakpoints

Time of First Successful Submission: 2026-03-07 07:04:18

GDB Scripting

Time of First Successful Submission: 2026-03-07 07:23:45

Modifying Data

Time of First Successful Submission: 2026-03-07 07:27:47

Modifying Execution

Time of First Successful Submission: 2026-03-07 08:00:57

Broken Functions

Time of First Successful Submission: 2026-03-07 08:15:59

Playing With Programs

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What's the password?

Time of First Successful Submission: 2026-03-07 08:17:49

... and again!

Time of First Successful Submission: 2026-03-07 08:18:35

Newline Troubles

Time of First Successful Submission: 2026-03-07 08:20:07

Reasoning about files

Time of First Successful Submission: 2026-03-07 08:21:27

Specifying Filenames

Time of First Successful Submission: 2026-03-07 08:22:27

Binary and Hex Encoding

Time of First Successful Submission: 2026-03-07 12:24:48

More Hex

Time of First Successful Submission: 2026-03-07 12:29:32

Decoding Hex

Time of First Successful Submission: 2026-03-07 12:33:44

Decoding Practice

Time of First Successful Submission: 2026-03-07 12:37:26

Encoding Practice

Time of First Successful Submission: 2026-03-07 12:40:58

Hex-encoding ASCII

Time of First Successful Submission: 2026-03-07 13:31:54

Nested Encoding

Time of First Successful Submission: 2026-03-08 05:26:19

Hex-encoding UTF-8

Time of First Successful Submission: 2026-03-08 05:30:49

UTF Mixups

Time of First Successful Submission: 2026-03-08 05:35:42

Modifying Encoded Data

Time of First Successful Submission: 2026-03-08 05:39:15

Decoding Base64

Time of First Successful Submission: 2026-03-08 05:41:43

Encoding Base64

Time of First Successful Submission: 2026-03-08 05:46:39

Dealing with Obfuscation

Time of First Successful Submission: 2026-03-08 05:52:37

Dealing with Obfuscation 2

Time of First Successful Submission: 2026-03-08 05:56:56

Your First HTTP Request

Time of First Successful Submission: 2026-03-08 06:30:54

Reading Flask

Time of First Successful Submission: 2026-03-08 06:32:26

Commented Data

Time of First Successful Submission: 2026-03-08 06:34:51

HTTP Metadata

Time of First Successful Submission: 2026-03-08 10:22:38

HTTP (netcat)

Time of First Successful Submission: 2026-03-08 10:27:08

HTTP Paths (netcat)

Time of First Successful Submission: 2026-03-08 10:28:43

HTTP (curl)

Time of First Successful Submission: 2026-03-08 10:29:35

HTTP (python)

Time of First Successful Submission: 2026-03-08 10:32:09

HTTP Host Header (python)

Time of First Successful Submission: 2026-03-08 10:37:19

HTTP Host Header (curl)

Time of First Successful Submission: 2026-03-08 10:39:05

HTTP Host Header (netcat)

Time of First Successful Submission: 2026-03-08 10:40:38

URL Encoding (netcat)

Time of First Successful Submission: 2026-03-08 10:48:03

HTTP GET Parameters

Time of First Successful Submission: 2026-03-08 10:50:20

Multiple HTTP Parameters (netcat)

Time of First Successful Submission: 2026-03-08 10:52:35

Multiple HTTP Parameters (curl)

Time of First Successful Submission: 2026-03-08 10:53:50

HTTP Forms

Time of First Successful Submission: 2026-03-08 10:55:27

HTTP Forms (curl)

Time of First Successful Submission: 2026-03-08 10:58:53

HTTP Forms (netcat)

Time of First Successful Submission: 2026-03-08 11:02:11

HTTP Forms (python)

Time of First Successful Submission: 2026-03-08 11:06:14

HTTP Forms Without Forms

Time of First Successful Submission: 2026-03-08 11:17:54

Multiple Form Fields (curl)

Time of First Successful Submission: 2026-03-08 11:21:06

Multiple Form Fields (netcat)

Time of First Successful Submission: 2026-03-08 11:22:55

HTTP Redirects (netcat)

Time of First Successful Submission: 2026-03-08 11:26:37

HTTP Redirects (curl)

Time of First Successful Submission: 2026-03-08 11:27:23

HTTP Redirects (python)

Time of First Successful Submission: 2026-03-08 11:28:29

HTTP Cookies (curl)

Time of First Successful Submission: 2026-03-08 11:55:20

HTTP Cookies (netcat)

Time of First Successful Submission: 2026-03-08 11:54:35

HTTP Cookies (python)

Time of First Successful Submission: 2026-03-08 11:59:40

Server State (python)

Time of First Successful Submission: 2026-03-08 12:00:53

Listening Web

Time of First Successful Submission: 2026-03-08 12:05:08

Speaking Redirects

Time of First Successful Submission: 2026-03-08 14:14:40

JavaScript Redirects

Time of First Successful Submission: 2026-03-08 14:23:36

Including JavaScript

Time of First Successful Submission: 2026-03-08 14:52:01

HTTP (javascript)

Time of First Successful Submission: 2026-03-08 14:58:12

HTTP Get Parameters (javascript)

Time of First Successful Submission: 2026-03-08 15:01:50

HTTP Forms (javascript)

Time of First Successful Submission: 2026-03-08 15:05:22

cat

Time of First Successful Submission: 2026-03-08 15:09:07

more

Time of First Successful Submission: 2026-03-08 15:09:30

less

Time of First Successful Submission: 2026-03-09 01:04:12

tail

Time of First Successful Submission: 2026-03-09 01:04:35

head

Time of First Successful Submission: 2026-03-09 01:04:54

sort

Time of First Successful Submission: 2026-03-09 01:06:08

vim

Time of First Successful Submission: 2026-03-09 01:06:32

emacs

Time of First Successful Submission: 2026-03-09 01:06:54

nano

Time of First Successful Submission: 2026-03-09 01:07:17

rev

Time of First Successful Submission: 2026-03-09 01:07:41

od

Time of First Successful Submission: 2026-03-09 01:09:54

hd

Time of First Successful Submission: 2026-03-09 01:10:48

xxd

Time of First Successful Submission: 2026-03-09 01:11:41

base32

Time of First Successful Submission: 2026-03-09 01:12:07

base64

Time of First Successful Submission: 2026-03-09 01:12:28

split

Time of First Successful Submission: 2026-03-09 01:13:46

gzip

Time of First Successful Submission: 2026-03-09 01:17:42

bzip2

Time of First Successful Submission: 2026-03-09 02:05:12

zip

Time of First Successful Submission: 2026-03-09 02:58:40

tar

Time of First Successful Submission: 2026-03-09 07:10:24

ar

Time of First Successful Submission: 2026-03-09 07:13:35

cpio

Time of First Successful Submission: 2026-03-09 07:16:52

genisoimage

Time of First Successful Submission: 2026-03-09 11:21:56

env

Time of First Successful Submission: 2026-03-09 07:18:21

find

Time of First Successful Submission: 2026-03-09 07:07:52

make

Time of First Successful Submission: 2026-03-09 07:20:51

nice

Time of First Successful Submission: 2026-03-09 07:39:25

timeout

Time of First Successful Submission: 2026-03-09 07:40:03

stdbuf

Time of First Successful Submission: 2026-03-09 07:40:52

setarch

Time of First Successful Submission: 2026-03-09 08:22:20

watch

Time of First Successful Submission: 2026-03-09 07:43:05

socat

Time of First Successful Submission: 2026-03-09 10:32:53

whiptail

Time of First Successful Submission: 2026-03-09 10:30:46

awk

Time of First Successful Submission: 2026-03-09 06:59:06

sed

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ed

Time of First Successful Submission: 2026-03-09 07:46:35

chown

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chmod

Time of First Successful Submission: 2026-03-09 07:00:49

cp

Time of First Successful Submission: 2026-03-09 07:05:15

mv

Time of First Successful Submission: 2026-03-09 09:07:54

perl

Time of First Successful Submission: 2026-03-09 07:54:21

python

Time of First Successful Submission: 2026-03-09 06:56:16

ruby

Time of First Successful Submission: 2026-03-09 07:56:18

bash

Time of First Successful Submission: 2026-03-09 06:55:04

date

Time of First Successful Submission: 2026-03-09 07:57:24

dmesg

Time of First Successful Submission: 2026-03-09 07:58:01

wc

Time of First Successful Submission: 2026-03-09 07:59:00

gcc

Time of First Successful Submission: 2026-03-09 07:59:46

as

Time of First Successful Submission: 2026-03-09 08:17:35

wget

Time of First Successful Submission: 2026-03-09 08:16:19

ssh-keygen

Time of First Successful Submission: 2026-03-09 10:22:11

SQL Queries

Time of First Successful Submission: 2026-03-09 11:25:37

Filtering SQL

Time of First Successful Submission: 2026-03-09 11:27:50

Choosing Columns

Time of First Successful Submission: 2026-03-09 11:29:38

Exclusionary Filtering

Time of First Successful Submission: 2026-03-09 11:31:16

Filtering Strings

Time of First Successful Submission: 2026-03-09 11:32:47

Filtering on Expressions

Time of First Successful Submission: 2026-03-09 11:35:53

SELECTing Expressions

Time of First Successful Submission: 2026-03-09 11:40:05

Composite Conditions

Time of First Successful Submission: 2026-03-09 11:42:19

Reaching Your LIMITs

Time of First Successful Submission: 2026-03-09 11:43:47

Querying Metadata

Time of First Successful Submission: 2026-03-09 11:45:48

GCA CTF

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Using the Terminal

Time of First Successful Submission: 2026-02-23 15:22:07

Using the VSCode Workspace

Time of First Successful Submission: 2026-02-23 15:26:05

Using the GUI Desktop

Time of First Successful Submission: 2026-02-23 15:28:18

Pasting into the Desktop

Time of First Successful Submission: 2026-02-23 15:30:27

Connecting over SSH

Time of First Successful Submission: 2026-02-23 15:31:21

Restarting Challenges

Time of First Successful Submission: 2026-02-23 15:35:21

Challenge Programs

Time of First Successful Submission: 2026-02-23 15:36:55

The Flag File

Time of First Successful Submission: 2026-02-23 15:39:03

Using Privileged Mode

Time of First Successful Submission: 2026-02-23 15:42:51

Persistent Home Directories - One

Time of First Successful Submission: 2026-02-23 15:45:45

Persistent Home Directories - Two

Time of First Successful Submission: 2026-02-23 15:46:32