Past CTFs

You can look back on CTFs from the past.
All writeups
You can review the solution of the challenge by reading writeups.
Title
CTF
Author
Created at
{ "id": 569, "order_display": "B", "tags": [ "pwnable" ], "deployed": true, "hints": [], "order": 1, "title": "uniqdb", "description": "##### Description\n\nflask와 ctypes 모듈을 이용해 다양한 연산을 할 수 있는 웹 서비스를 만들었어요.\n취약점을 찾고 익스플로잇해 플래그를 획득하세요!\n\n플래그 형식은 DH{...} 입니다.\n", "public": "https://sfo2.digitaloceanspaces.com/wargame1/public/0383f6e1-8093-4743-9a73-7a2c85e50847.zip?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=OIK4A6AORYFTHBTQUV55%2F20221128%2Fsfo2%2Fs3%2Faws4_request&X-Amz-SignedHeaders=host&X-Amz-Expires=86400&X-Amz-Date=20221128T135414Z&X-Amz-Signature=8fa0d52defe4902ff296b6927332fc7b0e4952115d5b5918244a13a9561e75c0", "public_expires": "2022-11-29T10:54:14.819216+09:00", "needs_vm": true, "is_public_available": true, "score": 998, "exported_to": 681 } Dreamhack CTF Season 2 Round #9 2022.11.17. 00:00:00
{ "id": 570, "order_display": "C", "tags": [ "web" ], "deployed": true, "hints": [], "order": 2, "title": "Blind Board", "description": "##### Description\n\n일반 사용자는 볼 수 없는 게시판을 만들었어요.\n관리자(admin)의 비밀번호를 알아내세요!\n\n관리자(admin)의 비밀번호가 플래그입니다.\n플래그 형식은 ```DH{[0-9]{16}}```입니다.\n", "public": "https://sfo2.digitaloceanspaces.com/wargame1/public/f9ae443b-9c16-42f0-9127-abd0e90d8b58.zip?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=OIK4A6AORYFTHBTQUV55%2F20221128%2Fsfo2%2Fs3%2Faws4_request&X-Amz-SignedHeaders=host&X-Amz-Expires=86400&X-Amz-Date=20221128T135414Z&X-Amz-Signature=3c57743a12220febe657ae22f2b77f73470011ddf74c74aa5870a0fdd8f59de7", "public_expires": "2022-11-29T10:54:14.898700+09:00", "needs_vm": true, "is_public_available": true, "score": 957, "exported_to": null } Dreamhack CTF Season 2 Round #9 2022.11.17. 00:00:00
{ "id": 565, "order_display": "D", "tags": [ "web" ], "deployed": true, "hints": [], "order": 3, "title": "CProxy: Poison", "description": "임의 웹사이트로 http 요청을 보내고 응답을 확인할 수 있는 온라인 프록시 서비스 `CProxy`입니다.\n\n프록시 서비스를 공격하여 서비스가 잘 작동하는지 확인하는 `watchdog` 서비스의 요청을 탈취하세요!\n\n-----\n\nNote: 모든 `CProxy` 문제들의 문제 파일과 동작 중인 서비스는 동일합니다.\n", "public": "https://sfo2.digitaloceanspaces.com/wargame1/public/c994dfa4-9477-402d-ad3e-9738dbb1536a.zip?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=OIK4A6AORYFTHBTQUV55%2F20221128%2Fsfo2%2Fs3%2Faws4_request&X-Amz-SignedHeaders=host&X-Amz-Expires=86400&X-Amz-Date=20221128T054057Z&X-Amz-Signature=ec130ed8f0f51bd314abdc1356c6bb2d0b512097a938422a9503b115225da9bf", "public_expires": "2022-11-29T02:40:57.460576+09:00", "needs_vm": true, "is_public_available": true, "score": 992, "exported_to": 679 } Dreamhack CTF Season 2 Round #8 2022.11.10. 00:00:00
{ "id": 566, "order_display": "E", "tags": [ "misc", "crypto" ], "deployed": true, "hints": [], "order": 4, "title": "Robot Only", "description": "# Description\n로봇만 이용할 수 있는 도박장이에요.\n로봇임을 인증하고 경기에서 이겨 플래그를 구매하세요!\n", "public": "https://sfo2.digitaloceanspaces.com/wargame1/public/cfa07366-aeaf-4298-9eb1-d23f3c6df1cb.zip?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=OIK4A6AORYFTHBTQUV55%2F20221128%2Fsfo2%2Fs3%2Faws4_request&X-Amz-SignedHeaders=host&X-Amz-Expires=86400&X-Amz-Date=20221128T054057Z&X-Amz-Signature=c7afaf36df9c7f597f32011469ce0ae87dcb25a5341e4a8da0675b96dc1121bb", "public_expires": "2022-11-29T02:40:57.540102+09:00", "needs_vm": true, "is_public_available": true, "score": 372, "exported_to": 680 } Dreamhack CTF Season 2 Round #8 2022.11.10. 00:00:00
{ "id": 563, "order_display": "B", "tags": [ "web" ], "deployed": true, "hints": [], "order": 1, "title": "CProxy: Inject", "description": "임의 웹사이트로 http 요청을 보내고 응답을 확인할 수 있는 온라인 프록시 서비스 `CProxy`입니다.\n\n`admin_inject` 계정을 탈취하고 프록시 응답 기록을 유출하여 플래그를 획득하세요!\n\n-----\n\nNote: 모든 `CProxy` 문제들의 문제 파일과 동작 중인 서비스는 동일합니다.\n", "public": "https://sfo2.digitaloceanspaces.com/wargame1/public/5887587e-e677-449b-adcc-dbcef6297d3e.zip?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=OIK4A6AORYFTHBTQUV55%2F20221128%2Fsfo2%2Fs3%2Faws4_request&X-Amz-SignedHeaders=host&X-Amz-Expires=86400&X-Amz-Date=20221128T054057Z&X-Amz-Signature=81fdc90ec1d2a7748cb696f48581ff2a3cd7662f25016663624570a7d7e517c0", "public_expires": "2022-11-29T02:40:57.295005+09:00", "needs_vm": true, "is_public_available": true, "score": 866, "exported_to": 677 } Dreamhack CTF Season 2 Round #8 2022.11.10. 00:00:00
{ "id": 564, "order_display": "C", "tags": [ "web" ], "deployed": true, "hints": [], "order": 2, "title": "CProxy: Forge", "description": "임의 웹사이트로 http 요청을 보내고 응답을 확인할 수 있는 온라인 프록시 서비스 `CProxy`입니다.\n\n프록시를 통해 내부 API `/api/local/flag`에 요청을 보내 플래그를 획득하세요!\n\n-----\n\nNote: 모든 `CProxy` 문제들의 문제 파일과 동작 중인 서비스는 동일합니다.\n", "public": "https://sfo2.digitaloceanspaces.com/wargame1/public/27efe810-49d2-4797-a078-3c0ab2fbf45e.zip?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=OIK4A6AORYFTHBTQUV55%2F20221128%2Fsfo2%2Fs3%2Faws4_request&X-Amz-SignedHeaders=host&X-Amz-Expires=86400&X-Amz-Date=20221128T054057Z&X-Amz-Signature=d48836e3378ef56fa18cc5399d0d69d604dac4aca52e0f5041d437c483677e7d", "public_expires": "2022-11-29T02:40:57.379303+09:00", "needs_vm": true, "is_public_available": true, "score": 924, "exported_to": 678 } Dreamhack CTF Season 2 Round #8 2022.11.10. 00:00:00
{ "id": 513, "order_display": "B", "tags": [ "pwnable" ], "deployed": true, "hints": [], "order": 1, "title": "Find Candy", "description": "##### Description\n어딘가에 사탕을 숨겨놓았어요\n쉘코드로 사탕을 찾아주세요!\n\n- `flag` 파일은 458바이트 크기 아스키아트입니다. 아스키아트 속에 DH{...} 형태의 플래그가 존재합니다.\n", "public": "https://sfo2.digitaloceanspaces.com/wargame1/public/5902a635-919c-44e4-a341-6fe433efc27d.zip?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=OIK4A6AORYFTHBTQUV55%2F20221128%2Fsfo2%2Fs3%2Faws4_request&X-Amz-SignedHeaders=host&X-Amz-Expires=86400&X-Amz-Date=20221128T045655Z&X-Amz-Signature=bda3d720db416bd4b55ab816d966e8b9484cd0e2ec01fd621d4ab8153063ffc6", "public_expires": "2022-11-29T01:56:55.276005+09:00", "needs_vm": true, "is_public_available": true, "score": 897, "exported_to": 661 } Dreamhack CTF Season 2 Round #7 2022.10.27. 00:00:00
{ "id": 535, "order_display": "C", "tags": [ "pwnable" ], "deployed": true, "hints": [], "order": 2, "title": "House of Pumpkin", "description": "# House of Pumpkin\n\nEverybody loves old festival and old heap. Am I wrong? \n\n\n\n\n ████\n ██▓▓▓▓██\n ██▓▓▓▓██\n ██▓▓██\n ████████ ██▓▓██ ████████\n ████░░░░░░░░████▓▓████░░░░░░░░████\n ████░░░░░░░░░░██░░░░██░░░░██░░░░░░░░░░████\n ██░░░░██░░░░░░██░░░░░░░░░░░░░░██░░░░░░██░░░░██\n ██░░░░██░░░░░░░░░░░░░░░░██░░░░░░░░░░░░░░░░██░░░░██\n ██░░██░░░░░░░░██░░░░░░░░██░░░░░░░░██░░░░░░░░██░░██\n ██░░██░░░░░░░░██████░░░░░░██░░░░░░██████░░░░░░░░██░░██\n ██░░██░░░░░░██████████░░░░░░░░░░██████████░░░░░░██░░██\n ██░░██░░░░░░██████████░░░░░░░░░░██████████░░░░░░██░░██\n ██░░██░░░░░░░░░░░░░░░░░░░░██░░░░░░░░░░░░░░░░░░░░██░░██\n ██░░██░░░░░░░░░░░░░░░░░░██████░░░░░░░░░░░░░░░░░░██░░██\n ██░░██░░░░░░░░░░░░░░░░██████████░░░░░░░░░░░░░░░░██░░██\n ██░░░░░░░░░░░░████░░░░░░░░░░░░░░░░░░████░░░░░░░░░░░░██\n ██░░░░░░░░░░░░░░████░░░░░░░░░░░░░░████░░░░░░░░░░░░░░██\n ██░░██░░░░░░░░░░██████████████████░░░░░░░░░░██░░██\n ██░░░░██░░░░░░░░░░░░██████████░░░░░░░░░░░░██░░░░██\n ██░░░░██░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░██░░░░██\n ████░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░████\n ████░░░░░░░░░░░░██░░░░░░░░░░░░████\n ████████████ ████████████\n\n\n\n\n", "public": "https://sfo2.digitaloceanspaces.com/wargame1/public/5ea7fd14-31d8-4ccb-b42d-b03b8dbcf22a.zip?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=OIK4A6AORYFTHBTQUV55%2F20221128%2Fsfo2%2Fs3%2Faws4_request&X-Amz-SignedHeaders=host&X-Amz-Expires=86400&X-Amz-Date=20221128T045655Z&X-Amz-Signature=0c613b8c8447bac5970f722e4a94de2c3f954ac886a4c0aee9937d392fded98b", "public_expires": "2022-11-29T01:56:55.350933+09:00", "needs_vm": true, "is_public_available": true, "score": 998, "exported_to": 624 } Dreamhack CTF Season 2 Round #7 2022.10.27. 00:00:00
{ "id": 508, "order_display": "B", "tags": [ "reversing" ], "deployed": true, "hints": [], "order": 1, "title": "Theori of Relativity", "description": "드멍이는 가을학기 중간고사를 위해 열심히 공부 중이에요.\n상대성 이론이 이해가 되지 않아 드냥이에게 물어보니, 이 문제를 풀어오면 도와주겠다고 하네요.\n문제를 풀고 드멍이의 중간고사 점수를 지켜주세요!\n", "public": "https://sfo2.digitaloceanspaces.com/wargame1/public/6926a106-2235-49d1-bee4-ac0e4b61a23f.zip?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=OIK4A6AORYFTHBTQUV55%2F20221128%2Fsfo2%2Fs3%2Faws4_request&X-Amz-SignedHeaders=host&X-Amz-Expires=86400&X-Amz-Date=20221128T020531Z&X-Amz-Signature=143691fa4f492c98c8d5851bba4125a03506866cfa407231654410fe60873c3c", "public_expires": "2022-11-28T23:05:31.960647+09:00", "needs_vm": false, "is_public_available": true, "score": 850, "exported_to": 638 } Dreamhack CTF Season 2 Round #6 2022.10.20. 00:00:00
{ "id": 509, "order_display": "C", "tags": [ "pwnable", "crypto" ], "deployed": true, "hints": [], "order": 2, "title": "Shared Library", "description": "독서의 계절을 맞아 드멍이와 드냥이가 도서관을 방문했어요.\n도서관에서 읽고 싶은 책을 찾아 읽어보고, 마음에 드는 책은 빌려가서 잘 읽고 원 상태로 반납해주세요!\n", "public": "https://sfo2.digitaloceanspaces.com/wargame1/public/fd1d2a57-479e-404f-858f-afb6e8f871b7.zip?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=OIK4A6AORYFTHBTQUV55%2F20221128%2Fsfo2%2Fs3%2Faws4_request&X-Amz-SignedHeaders=host&X-Amz-Expires=86400&X-Amz-Date=20221128T020532Z&X-Amz-Signature=0c06f248e3af9691ddebf53256080a363a4a269e1c42b04a433d51c6267902af", "public_expires": "2022-11-28T23:05:32.040578+09:00", "needs_vm": true, "is_public_available": true, "score": 996, "exported_to": 639 } Dreamhack CTF Season 2 Round #6 2022.10.20. 00:00:00