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1 / 202 22540 / 22791

Triple Dereference

Time of First Successful Submission: 2026-02-04 11:15:53

Intro to Programming Languages

15 / 234 8243 / 31955

Commands

Time of First Successful Submission: 2026-01-31 07:20:50

Command Arguments

Time of First Successful Submission: 2026-01-31 07:21:46

Command History

Time of First Successful Submission: 2026-01-31 07:22:20

The Root Path

Time of First Successful Submission: 2026-01-31 07:23:13

Absolute Paths

Time of First Successful Submission: 2026-01-31 07:24:46

Changing position

Time of First Successful Submission: 2026-01-31 07:25:49

Changing to an Absolute Path

Time of First Successful Submission: 2026-01-31 07:27:38

Relative Paths

Time of First Successful Submission: 2026-01-31 22:42:58

Cat

Time of First Successful Submission: 2026-01-31 22:48:41

Ls

Time of First Successful Submission: 2026-02-01 00:10:27

Ls All

Time of First Successful Submission: 2026-02-01 01:27:39

Find

Time of First Successful Submission: 2026-01-31 07:34:52

Piping Echo

Time of First Successful Submission: 2026-02-01 05:11:44

Piping Stdout

Time of First Successful Submission: 2026-02-01 05:16:48

Piping Stdin

Time of First Successful Submission: 2026-02-01 06:35:23

Intro to Cybersecurity

104 / 183 2084 / 20023

Path Traversal 1

Time of First Successful Submission: 2026-03-27 23:22:51

Path Traversal 2

Time of First Successful Submission: 2026-03-27 23:35:26

CMDi 1

Time of First Successful Submission: 2026-03-29 03:52:38

CMDi 2

Time of First Successful Submission: 2026-03-29 03:55:49

CMDi 3

Time of First Successful Submission: 2026-03-29 04:03:09

CMDi 4

Time of First Successful Submission: 2026-03-29 04:07:04

CMDi 5

Time of First Successful Submission: 2026-03-29 04:17:47

CMDi 6

Time of First Successful Submission: 2026-03-29 04:43:11

Authentication Bypass 1

Time of First Successful Submission: 2026-03-29 06:08:56

Authentication Bypass 2

Time of First Successful Submission: 2026-03-29 06:13:39

SQLi 1

Time of First Successful Submission: 2026-03-29 06:54:27

SQLi 2

Time of First Successful Submission: 2026-03-29 07:26:07

SQLi 3

Time of First Successful Submission: 2026-03-29 07:49:51

SQLi 4

Time of First Successful Submission: 2026-03-29 08:01:09

SQLi 5

Time of First Successful Submission: 2026-03-29 11:15:33

XSS 1

Time of First Successful Submission: 2026-03-29 11:44:21

XSS 2

Time of First Successful Submission: 2026-03-29 11:49:42

XSS 3

Time of First Successful Submission: 2026-03-29 12:12:26

XSS 4

Time of First Successful Submission: 2026-03-29 12:20:34

XSS 5

Time of First Successful Submission: 2026-03-29 14:03:23

XSS 6

Time of First Successful Submission: 2026-03-29 14:20:26

XSS 7

Time of First Successful Submission: 2026-03-29 15:30:09

CSRF 1

Time of First Successful Submission: 2026-03-29 23:41:38

CSRF 2

Time of First Successful Submission: 2026-03-29 23:56:23

CSRF 3

Time of First Successful Submission: 2026-03-30 00:16:43

CSRF 4

Time of First Successful Submission: 2026-03-30 00:43:44

CSRF 5

Time of First Successful Submission: 2026-03-30 00:59:53

Connect

Time of First Successful Submission: 2026-03-30 05:25:12

Send

Time of First Successful Submission: 2026-03-30 05:26:35

Shutdown

Time of First Successful Submission: 2026-03-30 05:29:06

Listen

Time of First Successful Submission: 2026-03-30 05:30:23

Scan 1

Time of First Successful Submission: 2026-03-30 05:43:57

Scan 2

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

Monitor 1

Time of First Successful Submission: 2026-03-30 06:41:37

Monitor 2

Time of First Successful Submission: 2026-03-30 06:52:17

Sniffing Cookies

Time of First Successful Submission: 2026-03-30 07:00:05

Network Configuration

Time of First Successful Submission: 2026-03-30 07:57:57

Firewall 1

Time of First Successful Submission: 2026-03-30 08:04:55

Firewall 2

Time of First Successful Submission: 2026-03-30 08:10:22

Firewall 3

Time of First Successful Submission: 2026-03-30 08:15:27

Denial of Service 1

Time of First Successful Submission: 2026-03-30 08:54:59

Denial of Service 2

Time of First Successful Submission: 2026-03-30 08:58:51

Denial of Service 3

Time of First Successful Submission: 2026-03-30 10:58:54

Ethernet

Time of First Successful Submission: 2026-03-30 11:15:42

IP

Time of First Successful Submission: 2026-03-30 11:31:47

TCP

Time of First Successful Submission: 2026-03-30 11:38:32

TCP Handshake

Time of First Successful Submission: 2026-03-30 11:44:55

UDP

Time of First Successful Submission: 2026-03-30 12:00:04

UDP 2

Time of First Successful Submission: 2026-03-30 12:07:15

UDP Spoofing 1

Time of First Successful Submission: 2026-03-30 12:13:06

UDP Spoofing 2

Time of First Successful Submission: 2026-03-30 12:40:25

UDP Spoofing 3

Time of First Successful Submission: 2026-03-30 12:53:39

UDP Spoofing 4

Time of First Successful Submission: 2026-03-30 13:04:50

ARP

Time of First Successful Submission: 2026-03-30 13:23:22

Intercept

Time of First Successful Submission: 2026-03-30 15:22:56

Man-in-the-Middle

Time of First Successful Submission: 2026-03-31 01:56:09

XOR

Time of First Successful Submission: 2026-03-30 01:47:55

XORing Hex

Time of First Successful Submission: 2026-03-30 01:51:25

XORing ASCII

Time of First Successful Submission: 2026-03-30 01:56:58

XORing ASCII Strings

Time of First Successful Submission: 2026-03-30 02:04:56

One-time Pad

Time of First Successful Submission: 2026-03-30 02:19:48

One-time Pad Tampering

Time of First Successful Submission: 2026-03-30 02:47:59

Many-time Pad

Time of First Successful Submission: 2026-03-30 03:57:54

AES

Time of First Successful Submission: 2026-03-30 04:19:26

level1

Time of First Successful Submission: 2026-03-31 02:18:28

level2

Time of First Successful Submission: 2026-03-31 02:18:56

level3

Time of First Successful Submission: 2026-03-31 02:19:30

level4

Time of First Successful Submission: 2026-03-31 02:22:18

level5

Time of First Successful Submission: 2026-03-31 02:26:52

level6

Time of First Successful Submission: 2026-03-31 02:32:40

level7

Time of First Successful Submission: 2026-03-31 03:03:39

level8

Time of First Successful Submission: 2026-03-31 03:05:07

level9

Time of First Successful Submission: 2026-03-31 03:07:06

level10

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

level11

Time of First Successful Submission: 2026-03-31 03:12:19

level12

Time of First Successful Submission: 2026-03-31 03:16:50

level13

Time of First Successful Submission: 2026-03-31 03:19:05

level14

Time of First Successful Submission: 2026-03-31 03:50:53

level15

Time of First Successful Submission: 2026-03-31 03:54:21

level16

Time of First Successful Submission: 2026-03-31 03:57:27

level17

Time of First Successful Submission: 2026-03-31 04:47:23

level18

Time of First Successful Submission: 2026-03-31 04:59:46

level19

Time of First Successful Submission: 2026-03-31 05:04:19

Your First Overflow (easy)

Time of First Successful Submission: 2026-03-31 05:14:54

Your First Overflow (hard)

Time of First Successful Submission: 2026-03-31 05:18:21

Precision (easy)

Time of First Successful Submission: 2026-03-31 06:12:16

Precision (hard)

Time of First Successful Submission: 2026-03-31 06:20:17

Variable Control (easy)

Time of First Successful Submission: 2026-03-31 06:27:53

Variable Control (hard)

Time of First Successful Submission: 2026-03-31 06:30:45

Control Hijack (easy)

Time of First Successful Submission: 2026-03-31 06:34:45

Control Hijack (hard)

Time of First Successful Submission: 2026-03-31 06:37:06

Tricky Control Hijack (easy)

Time of First Successful Submission: 2026-03-31 06:45:05

Tricky Control Hijack (hard)

Time of First Successful Submission: 2026-03-31 06:47:25

PIEs (easy)

Time of First Successful Submission: 2026-03-31 09:13:47

PIEs (hard)

Time of First Successful Submission: 2026-03-31 09:16:14

String Lengths (easy)

Time of First Successful Submission: 2026-03-31 09:27:43

String Lengths (hard)

Time of First Successful Submission: 2026-03-31 09:33:01

Basic Shellcode

Time of First Successful Submission: 2026-03-31 09:40:04

NOP Sleds

Time of First Successful Submission: 2026-03-31 09:45:30

NULL-Free Shellcode

Time of First Successful Submission: 2026-03-31 10:36:05

Hijack to (Mapped) Shellcode (easy)

Time of First Successful Submission: 2026-03-31 10:52:01

Hijack to (Mapped) Shellcode (hard)

Time of First Successful Submission: 2026-03-31 10:57:51

Hijack to Shellcode (easy)

Time of First Successful Submission: 2026-03-31 12:42:22

Hijack to Shellcode (hard)

Time of First Successful Submission: 2026-03-31 13:22:23

Program Security

13 / 162 4738 / 9565

ello ackers!

Time of First Successful Submission: 2026-03-28 03:49:48

Syscall Smuggler

Time of First Successful Submission: 2026-03-28 05:50:29

Syscall Shenanigans

Time of First Successful Submission: 2026-03-28 07:38:34

Byte Budget

Time of First Successful Submission: 2026-03-28 10:22:27

ClobberCode

Time of First Successful Submission: 2026-04-03 13:48:39

Diverse Delivery

Time of First Successful Submission: 2026-04-03 14:44:10

Pocket Payload

Time of First Successful Submission: 2026-04-03 14:49:07

Freebie (Easy)

Time of First Successful Submission: 2026-03-31 13:57:40

Freebie (Hard)

Time of First Successful Submission: 2026-03-31 14:05:53

Freebin Feint (Easy)

Time of First Successful Submission: 2026-04-02 22:47:40

Freebin Feint (Hard)

Time of First Successful Submission: 2026-04-02 23:07:02

Free Flag Fumble (Easy)

Time of First Successful Submission: 2026-04-02 23:09:37

Free Flag Fumble (Hard)

Time of First Successful Submission: 2026-04-02 23:56:58

System Security

8 / 95 2162 / 3325

level1.0

Time of First Successful Submission: 2026-02-08 05:13:08

level1.1

Time of First Successful Submission: 2026-02-08 05:26:20

level2.0

Time of First Successful Submission: 2026-02-08 09:42:18

level2.1

Time of First Successful Submission: 2026-02-08 09:43:54

level3.0

Time of First Successful Submission: 2026-02-08 09:46:46

level3.1

Time of First Successful Submission: 2026-02-08 09:48:13

level4.0

Time of First Successful Submission: 2026-02-08 11:18:54

level4.1

Time of First Successful Submission: 2026-03-29 02:11:38

Start Here

10 / 12 19310 / 43301

Using the Terminal

Time of First Successful Submission: 2026-01-31 03:55:05

Using the VSCode Workspace

Time of First Successful Submission: 2026-01-31 03:58:17

Using the GUI Desktop

Time of First Successful Submission: 2026-01-31 04:00:39

Pasting into the Desktop

Time of First Successful Submission: 2026-01-31 04:03:09

Restarting Challenges

Time of First Successful Submission: 2026-01-31 04:11:51

Challenge Programs

Time of First Successful Submission: 2026-01-31 04:22:18

The Flag File

Time of First Successful Submission: 2026-01-31 04:26:31

Using Privileged Mode

Time of First Successful Submission: 2026-01-31 04:34:32

Persistent Home Directories - One

Time of First Successful Submission: 2026-01-31 04:37:07

Persistent Home Directories - Two

Time of First Successful Submission: 2026-01-31 04:38:00

Linux Luminarium

128 / 128 1894 / 32363

Intro to Commands

Time of First Successful Submission: 2026-01-31 07:20:50

Intro to Arguments

Time of First Successful Submission: 2026-01-31 07:21:46

Command History

Time of First Successful Submission: 2026-01-31 07:22:20

The Root

Time of First Successful Submission: 2026-01-31 07:23:13

Program and absolute paths

Time of First Successful Submission: 2026-01-31 07:24:46

Position thy self

Time of First Successful Submission: 2026-01-31 07:25:49

Position elsewhere

Time of First Successful Submission: 2026-01-31 07:27:38

implicit relative paths, from /

Time of First Successful Submission: 2026-01-31 22:42:58

explicit relative paths, from /

Time of First Successful Submission: 2026-01-31 22:43:47

implicit relative path

Time of First Successful Submission: 2026-01-31 22:44:45

home sweet home

Time of First Successful Submission: 2026-01-31 22:47:35

cat: not the pet, but the command!

Time of First Successful Submission: 2026-01-31 22:48:41

catting absolute paths

Time of First Successful Submission: 2026-01-31 22:49:29

more catting practice

Time of First Successful Submission: 2026-01-31 22:51:15

grepping for a needle in a haystack

Time of First Successful Submission: 2026-01-31 22:52:18

comparing files

Time of First Successful Submission: 2026-01-31 22:53:12

listing files

Time of First Successful Submission: 2026-02-01 00:10:27

touching files

Time of First Successful Submission: 2026-02-01 00:11:13

removing files

Time of First Successful Submission: 2026-02-01 00:11:45

moving files

Time of First Successful Submission: 2026-02-01 00:12:36

copying files

Time of First Successful Submission: 2026-02-01 01:26:40

hidden files

Time of First Successful Submission: 2026-02-01 01:27:39

An Epic Filesystem Quest

Time of First Successful Submission: 2026-02-01 01:33:46

making directories

Time of First Successful Submission: 2026-02-01 01:34:37

finding files

Time of First Successful Submission: 2026-01-31 07:34:52

linking files

Time of First Successful Submission: 2026-01-31 07:40:22

Learning From Documentation

Time of First Successful Submission: 2026-02-01 02:03:19

Learning Complex Usage

Time of First Successful Submission: 2026-02-01 02:04:18

Reading Manuals

Time of First Successful Submission: 2026-02-01 02:06:08

Searching Manuals

Time of First Successful Submission: 2026-02-01 02:15:15

Searching For Manuals

Time of First Successful Submission: 2026-02-01 03:53:00

Helpful Programs

Time of First Successful Submission: 2026-02-01 03:54:39

Help for Builtins

Time of First Successful Submission: 2026-02-01 03:55:54

Matching with *

Time of First Successful Submission: 2026-02-01 04:10:26

Matching with ?

Time of First Successful Submission: 2026-02-01 04:11:30

Matching with []

Time of First Successful Submission: 2026-02-01 04:15:32

Matching paths with []

Time of First Successful Submission: 2026-02-01 04:16:28

Multiple globs

Time of First Successful Submission: 2026-02-01 04:18:24

Mixing globs

Time of First Successful Submission: 2026-02-01 04:52:21

Exclusionary globbing

Time of First Successful Submission: 2026-02-01 04:53:35

Tab completion

Time of First Successful Submission: 2026-02-01 05:01:27

Multiple options for tab completion

Time of First Successful Submission: 2026-02-01 05:05:29

Tab completion on commands

Time of First Successful Submission: 2026-02-01 05:06:17

Redirecting output

Time of First Successful Submission: 2026-02-01 05:11:44

Redirecting more output

Time of First Successful Submission: 2026-02-01 05:16:48

Appending output

Time of First Successful Submission: 2026-02-01 05:29:30

Redirecting errors

Time of First Successful Submission: 2026-02-01 05:30:51

Redirecting input

Time of First Successful Submission: 2026-02-01 06:35:23

Grepping stored results

Time of First Successful Submission: 2026-02-01 06:36:59

Grepping live output

Time of First Successful Submission: 2026-02-01 06:38:02

Grepping errors

Time of First Successful Submission: 2026-02-01 06:39:19

Filtering with grep -v

Time of First Successful Submission: 2026-02-01 06:48:54

Filtering with sed

Time of First Successful Submission: 2026-02-01 06:50:51

Duplicating piped data with tee

Time of First Successful Submission: 2026-02-01 07:17:37

Process substitution for input

Time of First Successful Submission: 2026-02-01 07:27:08

Writing to multiple programs

Time of First Successful Submission: 2026-02-01 09:49:44

Split-piping stderr and stdout

Time of First Successful Submission: 2026-02-01 10:20:42

Named pipes

Time of First Successful Submission: 2026-02-01 11:33:02

Printing Variables

Time of First Successful Submission: 2026-02-02 09:25:36

Setting Variables

Time of First Successful Submission: 2026-02-02 09:26:15

Multi-word Variables

Time of First Successful Submission: 2026-02-02 09:26:47

Exporting Variables

Time of First Successful Submission: 2026-02-02 09:28:15

Printing Exported Variables

Time of First Successful Submission: 2026-02-02 09:28:44

Storing Command Output

Time of First Successful Submission: 2026-02-02 09:29:46

Reading Input

Time of First Successful Submission: 2026-02-02 09:34:43

Reading Files

Time of First Successful Submission: 2026-02-02 09:35:49

Translating characters

Time of First Successful Submission: 2026-02-02 09:38:48

Deleting characters

Time of First Successful Submission: 2026-02-02 10:18:42

Deleting newlines

Time of First Successful Submission: 2026-02-02 10:27:09

Extracting the first lines with head

Time of First Successful Submission: 2026-02-02 10:38:16

Extracting specific sections of text

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

Sorting data

Time of First Successful Submission: 2026-02-02 10:50:57

Listing Processes

Time of First Successful Submission: 2026-02-02 11:21:12

Killing Processes

Time of First Successful Submission: 2026-02-02 11:25:10

Interrupting Processes

Time of First Successful Submission: 2026-02-02 11:28:07

Killing Misbehaving Processes

Time of First Successful Submission: 2026-02-02 13:59:36

Suspending Processes

Time of First Successful Submission: 2026-02-02 14:00:07

Resuming Processes

Time of First Successful Submission: 2026-02-02 14:00:41

Backgrounding Processes

Time of First Successful Submission: 2026-02-02 14:10:26

Foregrounding Processes

Time of First Successful Submission: 2026-02-02 14:14:42

Starting Backgrounded Processes

Time of First Successful Submission: 2026-02-02 14:15:32

Process Exit Codes

Time of First Successful Submission: 2026-02-02 14:23:43

Becoming root with su

Time of First Successful Submission: 2026-02-02 14:26:59

Other users with su

Time of First Successful Submission: 2026-02-02 14:27:49

Cracking passwords

Time of First Successful Submission: 2026-02-02 14:35:20

Using sudo

Time of First Successful Submission: 2026-02-02 14:40:05

Changing File Ownership

Time of First Successful Submission: 2026-02-02 23:38:57

Groups and Files

Time of First Successful Submission: 2026-02-02 23:55:37

Fun With Groups Names

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

Changing Permissions

Time of First Successful Submission: 2026-02-03 00:09:10

Executable Files

Time of First Successful Submission: 2026-02-03 00:10:53

Permission Tweaking Practice

Time of First Successful Submission: 2026-02-03 00:15:30

Permissions Setting Practice

Time of First Successful Submission: 2026-02-03 00:21:35

The SUID Bit

Time of First Successful Submission: 2026-02-03 00:24:35

Chaining with Semicolons

Time of First Successful Submission: 2026-02-03 06:35:04

Building on Success

Time of First Successful Submission: 2026-02-03 06:37:37

Handling Failure

Time of First Successful Submission: 2026-02-03 06:38:19

Your First Shell Script

Time of First Successful Submission: 2026-02-03 06:40:44

Redirecting Script Output

Time of First Successful Submission: 2026-02-03 06:52:01

Executable Shell Scripts

Time of First Successful Submission: 2026-02-03 06:55:38

Understanding Shebangs

Time of First Successful Submission: 2026-02-03 07:03:32

Scripting with Arguments

Time of First Successful Submission: 2026-02-03 07:06:22

Scripting with Conditionals

Time of First Successful Submission: 2026-02-03 07:08:43

Scripting with Default Cases

Time of First Successful Submission: 2026-02-03 07:10:19

Scripting with Multiple Conditions

Time of First Successful Submission: 2026-02-03 07:13:38

Reading Shell Scripts

Time of First Successful Submission: 2026-02-03 07:15:39

Launching Screen

Time of First Successful Submission: 2026-02-03 12:03:48

Detaching and Attaching

Time of First Successful Submission: 2026-02-03 12:11:25

Finding Sessions

Time of First Successful Submission: 2026-02-03 12:16:55

Switching Windows

Time of First Successful Submission: 2026-02-03 12:18:11

Detaching and Attaching (tmux)

Time of First Successful Submission: 2026-02-03 12:19:25

Switching Windows (tmux)

Time of First Successful Submission: 2026-02-03 12:24:18

The PATH Variable

Time of First Successful Submission: 2026-02-03 12:27:33

Setting PATH

Time of First Successful Submission: 2026-02-03 12:30:38

Finding Commands

Time of First Successful Submission: 2026-02-03 12:33:21

Adding Commands

Time of First Successful Submission: 2026-02-03 12:45:16

Hijacking Commands

Time of First Successful Submission: 2026-02-03 12:50:36

Bashrc Backdoor

Time of First Successful Submission: 2026-02-03 13:03:27

Sniffing Input

Time of First Successful Submission: 2026-02-03 13:51:10

Overshared Directories

Time of First Successful Submission: 2026-02-03 14:45:12

Tricky Linking

Time of First Successful Submission: 2026-02-03 23:17:33

Sniffing Process Arguments

Time of First Successful Submission: 2026-02-03 23:29:07

Snooping on Configurations

Time of First Successful Submission: 2026-02-03 23:47:15

The Fork Bomb

Time of First Successful Submission: 2026-02-04 02:04:46

Disk-Space Doomsday

Time of First Successful Submission: 2026-02-04 02:17:16

rm -rf /

Time of First Successful Submission: 2026-02-04 02:30:39

Life after rm -rf /

Time of First Successful Submission: 2026-02-04 02:40:34

Finding meaning after rm -rf /

Time of First Successful Submission: 2026-02-04 03:15:35

Computing 101

94 / 94 293 / 21516

Your First Register

Time of First Successful Submission: 2026-02-04 04:46:41

Your First Syscall

Time of First Successful Submission: 2026-02-04 04:53:31

Exit Codes

Time of First Successful Submission: 2026-02-04 04:57:35

Building Executables

Time of First Successful Submission: 2026-02-04 05:33:51

Moving Between Registers

Time of First Successful Submission: 2026-02-04 07:55:03

Loading From Memory

Time of First Successful Submission: 2026-02-04 10:45:51

More Loading Practice

Time of First Successful Submission: 2026-02-04 10:47:57

Dereferencing Pointers

Time of First Successful Submission: 2026-02-04 11:02:09

Dereferencing Yourself

Time of First Successful Submission: 2026-02-04 11:05:02

Dereferencing with Offsets

Time of First Successful Submission: 2026-02-04 11:06:20

Stored Addresses

Time of First Successful Submission: 2026-02-04 11:09:36

Double Dereference

Time of First Successful Submission: 2026-02-04 11:11:29

The Stack

Time of First Successful Submission: 2026-03-17 23:09:05

Stack Offsets

Time of First Successful Submission: 2026-03-17 23:10:52

Program Arguments on the Stack

Time of First Successful Submission: 2026-03-17 23:19:42

Popping From the Stack

Time of First Successful Submission: 2026-03-17 23:24:59

Disassembling Programs

Time of First Successful Submission: 2026-03-17 23:34:02

Tracing Syscalls

Time of First Successful Submission: 2026-02-04 10:33:19

Starting GDB

Time of First Successful Submission: 2026-02-04 10:34:02

Quitting GDB

Time of First Successful Submission: 2026-03-17 23:26:15

Starting Programs in GDB

Time of First Successful Submission: 2026-02-04 10:35:01

Disassembling in GDB

Time of First Successful Submission: 2026-03-18 00:20:59

Stepping Through Instructions

Time of First Successful Submission: 2026-03-18 00:37:47

Reading Register Values

Time of First Successful Submission: 2026-03-18 00:38:37

Popping Stack Values

Time of First Successful Submission: 2026-03-18 00:44:48

Examining Memory

Time of First Successful Submission: 2026-03-18 00:54:37

Examining Stack Pointers

Time of First Successful Submission: 2026-03-18 00:57:04

Cooperative Debugging

Time of First Successful Submission: 2026-03-18 01:15:22

Writing Output

Time of First Successful Submission: 2026-02-04 11:28:05

Chaining Syscalls

Time of First Successful Submission: 2026-02-04 11:29:20

Writing Strings

Time of First Successful Submission: 2026-02-04 11:30:08

Reading Data

Time of First Successful Submission: 2026-02-04 11:33:44

Opening Files

Time of First Successful Submission: 2026-03-18 01:53:03

Hardcoding the Filename

Time of First Successful Submission: 2026-03-18 02:06:52

Comparing Values

Time of First Successful Submission: 2026-03-18 04:06:17

Comparing Characters

Time of First Successful Submission: 2026-03-18 04:20:20

Conditional Control Flow

Time of First Successful Submission: 2026-03-18 04:32:57

Comparing Strings

Time of First Successful Submission: 2026-03-18 04:37:34

Reverse the Password

Time of First Successful Submission: 2026-03-18 04:46:26

Conditionals Without Conditionals

Time of First Successful Submission: 2026-03-18 05:04:34

Looping

Time of First Successful Submission: 2026-03-18 05:07:48

Reverse the Calculation

Time of First Successful Submission: 2026-03-18 07:01:56

Reverse the Reverse

Time of First Successful Submission: 2026-03-18 07:04:11

Dealing with Bitwise Operations

Time of First Successful Submission: 2026-03-18 07:07:23

Loops on Data

Time of First Successful Submission: 2026-03-18 07:18:44

set-register

Time of First Successful Submission: 2026-02-04 11:45:15

set-multiple-registers

Time of First Successful Submission: 2026-02-04 11:47:31

add-to-register

Time of First Successful Submission: 2026-02-04 11:49:02

linear-equation-registers

Time of First Successful Submission: 2026-02-04 11:52:59

integer-division

Time of First Successful Submission: 2026-02-04 11:59:40

modulo-operation

Time of First Successful Submission: 2026-02-04 12:03:00

set-upper-byte

Time of First Successful Submission: 2026-02-04 12:15:53

efficient-modulo

Time of First Successful Submission: 2026-02-04 12:31:09

byte-extraction

Time of First Successful Submission: 2026-02-04 13:00:50

bitwise-and

Time of First Successful Submission: 2026-02-04 13:06:29

check-even

Time of First Successful Submission: 2026-02-06 23:44:56

memory-read

Time of First Successful Submission: 2026-02-06 23:47:08

memory-write

Time of First Successful Submission: 2026-03-18 07:33:02

memory-increment

Time of First Successful Submission: 2026-03-18 07:43:54

byte-access

Time of First Successful Submission: 2026-03-18 07:53:22

memory-size-access

Time of First Successful Submission: 2026-03-18 07:58:32

little-endian-write

Time of First Successful Submission: 2026-03-18 08:25:36

memory-sum

Time of First Successful Submission: 2026-03-18 10:43:23

stack-subtraction

Time of First Successful Submission: 2026-03-18 10:46:03

swap-stack-values

Time of First Successful Submission: 2026-03-18 10:47:20

average-stack-values

Time of First Successful Submission: 2026-03-18 10:52:25

absolute-jump

Time of First Successful Submission: 2026-03-18 10:59:54

relative-jump

Time of First Successful Submission: 2026-03-18 11:15:05

jump-trampoline

Time of First Successful Submission: 2026-03-18 11:16:22

conditional-jump

Time of First Successful Submission: 2026-03-18 12:17:18

indirect-jump

Time of First Successful Submission: 2026-03-18 13:57:56

average-loop

Time of First Successful Submission: 2026-03-18 14:14:02

count-non-zero

Time of First Successful Submission: 2026-03-18 14:23:34

string-lower

Time of First Successful Submission: 2026-03-19 03:53:34

most-common-byte

Time of First Successful Submission: 2026-03-19 11:53:09

Exit

Time of First Successful Submission: 2026-03-19 12:34:24

Socket

Time of First Successful Submission: 2026-03-19 13:00:05

Bind

Time of First Successful Submission: 2026-03-20 05:05:37

Listen

Time of First Successful Submission: 2026-03-20 05:41:44

Accept

Time of First Successful Submission: 2026-03-20 05:53:07

Static Response

Time of First Successful Submission: 2026-03-21 13:28:15

Dynamic Response

Time of First Successful Submission: 2026-03-22 01:05:24

Iterative GET Server

Time of First Successful Submission: 2026-03-22 01:12:58

Concurrent GET Server

Time of First Successful Submission: 2026-03-22 01:31:22

Concurrent POST Server

Time of First Successful Submission: 2026-03-22 02:21:21

Web Server

Time of First Successful Submission: 2026-03-22 04:11:49

Debugging Programs

Time of First Successful Submission: 2026-03-19 13:57:02

Inspecting Registers

Time of First Successful Submission: 2026-03-19 14:02:31

Examining Memory

Time of First Successful Submission: 2026-03-19 14:11:57

Setting Breakpoints

Time of First Successful Submission: 2026-03-19 14:46:21

GDB Scripting

Time of First Successful Submission: 2026-03-19 23:47:13

Modifying Data

Time of First Successful Submission: 2026-03-20 01:06:33

Modifying Execution

Time of First Successful Submission: 2026-03-20 01:14:55

Broken Functions

Time of First Successful Submission: 2026-03-20 01:30:19

Playing With Programs

116 / 116 847 / 23371

What's the password?

Time of First Successful Submission: 2026-03-20 08:40:41

... and again!

Time of First Successful Submission: 2026-03-20 09:11:08

Newline Troubles

Time of First Successful Submission: 2026-03-20 09:23:19

Reasoning about files

Time of First Successful Submission: 2026-03-20 09:29:54

Specifying Filenames

Time of First Successful Submission: 2026-03-20 09:35:42

Binary and Hex Encoding

Time of First Successful Submission: 2026-03-22 04:15:37

More Hex

Time of First Successful Submission: 2026-03-22 04:21:34

Decoding Hex

Time of First Successful Submission: 2026-03-22 04:29:51

Decoding Practice

Time of First Successful Submission: 2026-03-22 05:53:56

Encoding Practice

Time of First Successful Submission: 2026-03-22 05:56:29

Hex-encoding ASCII

Time of First Successful Submission: 2026-03-22 06:22:50

Nested Encoding

Time of First Successful Submission: 2026-03-22 06:31:28

Hex-encoding UTF-8

Time of First Successful Submission: 2026-03-22 06:52:58

UTF Mixups

Time of First Successful Submission: 2026-03-22 07:06:45

Modifying Encoded Data

Time of First Successful Submission: 2026-03-22 07:18:16

Decoding Base64

Time of First Successful Submission: 2026-03-22 09:30:30

Encoding Base64

Time of First Successful Submission: 2026-03-22 09:32:00

Dealing with Obfuscation

Time of First Successful Submission: 2026-03-22 10:37:45

Dealing with Obfuscation 2

Time of First Successful Submission: 2026-03-22 10:42:42

Your First HTTP Request

Time of First Successful Submission: 2026-03-22 11:55:41

Reading Flask

Time of First Successful Submission: 2026-03-22 12:02:01

Commented Data

Time of First Successful Submission: 2026-03-22 13:11:05

HTTP Metadata

Time of First Successful Submission: 2026-03-22 13:51:00

HTTP (netcat)

Time of First Successful Submission: 2026-03-22 14:29:32

HTTP Paths (netcat)

Time of First Successful Submission: 2026-03-22 14:32:14

HTTP (curl)

Time of First Successful Submission: 2026-03-22 15:09:38

HTTP (python)

Time of First Successful Submission: 2026-03-22 15:16:40

HTTP Host Header (python)

Time of First Successful Submission: 2026-03-23 01:25:39

HTTP Host Header (curl)

Time of First Successful Submission: 2026-03-23 01:30:33

HTTP Host Header (netcat)

Time of First Successful Submission: 2026-03-23 01:33:54

URL Encoding (netcat)

Time of First Successful Submission: 2026-03-23 05:41:46

HTTP GET Parameters

Time of First Successful Submission: 2026-03-23 10:34:43

Multiple HTTP Parameters (netcat)

Time of First Successful Submission: 2026-03-23 11:06:12

Multiple HTTP Parameters (curl)

Time of First Successful Submission: 2026-03-23 11:14:48

HTTP Forms

Time of First Successful Submission: 2026-03-23 13:44:37

HTTP Forms (curl)

Time of First Successful Submission: 2026-03-23 13:52:26

HTTP Forms (netcat)

Time of First Successful Submission: 2026-03-23 14:50:03

HTTP Forms (python)

Time of First Successful Submission: 2026-03-25 05:41:55

HTTP Forms Without Forms

Time of First Successful Submission: 2026-03-25 06:05:08

Multiple Form Fields (curl)

Time of First Successful Submission: 2026-03-25 09:15:00

Multiple Form Fields (netcat)

Time of First Successful Submission: 2026-03-25 09:23:10

HTTP Redirects (netcat)

Time of First Successful Submission: 2026-03-25 09:33:34

HTTP Redirects (curl)

Time of First Successful Submission: 2026-03-25 09:35:21

HTTP Redirects (python)

Time of First Successful Submission: 2026-03-25 09:38:08

HTTP Cookies (curl)

Time of First Successful Submission: 2026-03-25 10:13:33

HTTP Cookies (netcat)

Time of First Successful Submission: 2026-03-25 11:11:27

HTTP Cookies (python)

Time of First Successful Submission: 2026-03-25 11:21:01

Server State (python)

Time of First Successful Submission: 2026-03-25 11:29:02

Listening Web

Time of First Successful Submission: 2026-03-25 12:13:51

Speaking Redirects

Time of First Successful Submission: 2026-03-25 12:32:10

JavaScript Redirects

Time of First Successful Submission: 2026-03-25 13:38:33

Including JavaScript

Time of First Successful Submission: 2026-03-26 00:11:12

HTTP (javascript)

Time of First Successful Submission: 2026-03-26 04:14:17

HTTP Get Parameters (javascript)

Time of First Successful Submission: 2026-03-26 04:35:07

HTTP Forms (javascript)

Time of First Successful Submission: 2026-03-26 05:00:31

cat

Time of First Successful Submission: 2026-03-26 05:01:37

more

Time of First Successful Submission: 2026-03-26 05:02:04

less

Time of First Successful Submission: 2026-03-26 05:02:40

tail

Time of First Successful Submission: 2026-03-26 05:03:06

head

Time of First Successful Submission: 2026-03-26 05:03:27

sort

Time of First Successful Submission: 2026-03-26 11:22:28

vim

Time of First Successful Submission: 2026-03-26 11:22:54

emacs

Time of First Successful Submission: 2026-03-26 11:23:43

nano

Time of First Successful Submission: 2026-03-26 11:25:00

rev

Time of First Successful Submission: 2026-03-26 11:26:19

od

Time of First Successful Submission: 2026-03-26 11:34:30

hd

Time of First Successful Submission: 2026-03-26 11:35:24

xxd

Time of First Successful Submission: 2026-03-26 11:36:36

base32

Time of First Successful Submission: 2026-03-26 11:38:25

base64

Time of First Successful Submission: 2026-03-26 11:40:11

split

Time of First Successful Submission: 2026-03-26 11:41:32

gzip

Time of First Successful Submission: 2026-03-26 11:50:11

bzip2

Time of First Successful Submission: 2026-03-26 11:51:36

zip

Time of First Successful Submission: 2026-03-26 12:02:47

tar

Time of First Successful Submission: 2026-03-26 12:15:17

ar

Time of First Successful Submission: 2026-03-26 12:24:43

cpio

Time of First Successful Submission: 2026-03-26 12:58:47

genisoimage

Time of First Successful Submission: 2026-03-26 13:36:28

env

Time of First Successful Submission: 2026-03-26 13:45:33

find

Time of First Successful Submission: 2026-03-26 13:57:22

make

Time of First Successful Submission: 2026-03-26 14:22:36

nice

Time of First Successful Submission: 2026-03-26 23:18:00

timeout

Time of First Successful Submission: 2026-03-26 23:19:18

stdbuf

Time of First Successful Submission: 2026-03-26 23:20:43

setarch

Time of First Successful Submission: 2026-03-26 23:22:59

watch

Time of First Successful Submission: 2026-03-26 23:23:57

socat

Time of First Successful Submission: 2026-03-26 23:32:15

whiptail

Time of First Successful Submission: 2026-03-26 23:34:55

awk

Time of First Successful Submission: 2026-03-26 23:40:01

sed

Time of First Successful Submission: 2026-03-26 23:42:02

ed

Time of First Successful Submission: 2026-03-26 23:44:49

chown

Time of First Successful Submission: 2026-03-26 23:45:28

chmod

Time of First Successful Submission: 2026-03-26 23:45:54

cp

Time of First Successful Submission: 2026-03-26 23:53:25

mv

Time of First Successful Submission: 2026-03-27 00:16:40

perl

Time of First Successful Submission: 2026-03-27 00:22:16

python

Time of First Successful Submission: 2026-03-27 00:24:18

ruby

Time of First Successful Submission: 2026-03-27 00:26:59

bash

Time of First Successful Submission: 2026-03-27 00:32:27

date

Time of First Successful Submission: 2026-03-27 00:33:56

dmesg

Time of First Successful Submission: 2026-03-27 00:36:56

wc

Time of First Successful Submission: 2026-03-27 00:57:27

gcc

Time of First Successful Submission: 2026-03-27 01:00:23

as

Time of First Successful Submission: 2026-03-27 01:01:36

wget

Time of First Successful Submission: 2026-03-27 01:09:28

ssh-keygen

Time of First Successful Submission: 2026-03-27 05:00:54

SQL Queries

Time of First Successful Submission: 2026-03-27 05:15:26

Filtering SQL

Time of First Successful Submission: 2026-03-27 05:26:01

Choosing Columns

Time of First Successful Submission: 2026-03-27 05:28:20

Exclusionary Filtering

Time of First Successful Submission: 2026-03-27 05:34:32

Filtering Strings

Time of First Successful Submission: 2026-03-27 05:35:37

Filtering on Expressions

Time of First Successful Submission: 2026-03-27 07:34:42

SELECTing Expressions

Time of First Successful Submission: 2026-03-27 08:09:23

Composite Conditions

Time of First Successful Submission: 2026-03-27 08:30:10

Reaching Your LIMITs

Time of First Successful Submission: 2026-03-27 08:34:02

Querying Metadata

Time of First Successful Submission: 2026-03-27 08:45:37

GCA CTF

10 / 104 19435 / 43578

Using the Terminal

Time of First Successful Submission: 2026-01-31 03:55:05

Using the VSCode Workspace

Time of First Successful Submission: 2026-01-31 03:58:17

Using the GUI Desktop

Time of First Successful Submission: 2026-01-31 04:00:39

Pasting into the Desktop

Time of First Successful Submission: 2026-01-31 04:03:09

Restarting Challenges

Time of First Successful Submission: 2026-01-31 04:11:51

Challenge Programs

Time of First Successful Submission: 2026-01-31 04:22:18

The Flag File

Time of First Successful Submission: 2026-01-31 04:26:31

Using Privileged Mode

Time of First Successful Submission: 2026-01-31 04:34:32

Persistent Home Directories - One

Time of First Successful Submission: 2026-01-31 04:37:07

Persistent Home Directories - Two

Time of First Successful Submission: 2026-01-31 04:38:00