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hxp 39C3 CTF

<<39C3

The CTF is over, thanks for playing! hxp <3 you! ๐Ÿ˜Š
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brainfast

by rfab and aengelke
pwn

Difficulty estimate: easy - easy

Points: round(1000 ยท min(1, 10 / (9 + [28 solves]))) = 270 points

Description:

My brainfuck interpreter was too slow, so I added a JIT compiler. Alpine Linux helps to keep things lightwight.


Download:

brainfast-419f7142bd4c7f3f.tar.xz (9.8 KiB)

Connection (mirrors):

  • nc 46.224.122.168 1337

Solution:


CTFtime Logo CTFtime: Task & Writeups

Solved by:

# Team Time
brainfast released 2025-12-28 00:38:01 +0000 UTC
๐Ÿฅ‡ L.A.R.P. 2025-12-28 01:39:14 +0000 UTC
๐Ÿฅˆ The Flat Network Society 2025-12-28 02:35:45 +0000 UTC
๐Ÿฅ‰ mhackeroni 2025-12-28 03:36:18 +0000 UTC
4 bi0s 2025-12-28 06:07:51 +0000 UTC
5 FMC 2025-12-28 07:15:58 +0000 UTC
6 lasos 2025-12-28 08:49:52 +0000 UTC
7 pasten 2025-12-28 09:31:29 +0000 UTC
8 I_1AF 2025-12-28 10:38:29 +0000 UTC
9 PwnSec 2025-12-28 11:21:47 +0000 UTC
10 Redback Crawlers Ensemble 2025-12-28 11:34:11 +0000 UTC
11 Never Stop Exploiting 2025-12-28 12:20:24 +0000 UTC
12 KuK Hofhackerei 2025-12-28 12:27:22 +0000 UTC
13 dizziness 2025-12-28 13:03:20 +0000 UTC
14 crazyman's friends 2025-12-28 14:32:50 +0000 UTC
15 justCatTheFish 2025-12-28 14:44:59 +0000 UTC
16 Marcio Herobrine 2025-12-28 16:31:35 +0000 UTC
17 W4llz 2025-12-28 17:29:21 +0000 UTC
18 Dragon Sector 2025-12-28 20:36:45 +0000 UTC
19 0xfun 2025-12-28 21:56:35 +0000 UTC
20 Fermion 2025-12-29 02:26:40 +0000 UTC
21 WROng_flag 2025-12-29 04:07:16 +0000 UTC
22 BunkyoWesterns 2025-12-29 06:35:51 +0000 UTC
23 pandasiuuuu 2025-12-29 07:08:53 +0000 UTC
24 infobahn 2025-12-29 07:54:19 +0000 UTC
25 FluxFingers 2025-12-29 11:20:01 +0000 UTC
26 SoloSoLow 2025-12-29 12:16:24 +0000 UTC
27 Call the Team 2025-12-29 13:40:58 +0000 UTC
28 More Smoked Leet Chicken 2025-12-29 15:24:22 +0000 UTC