asepharyana
7a6e717c28
- Deleted all previous dummy docs (defcon-quals-2024, infra/cloudflare-525, debugging/websocket-timeout, template, docs/*, notes/*, research/*) - Added 14 Gemastik warmup writeups covering encoding, stego, web, pwn, crypto - ch13: RSA small factors; ch14: RSA special integers via paper-search (GCD with paper appendix primes) - All flags recovered and documented with solution methods
610 B
610 B
title, event, challenge, category, points, difficulty, flag
| title | event | challenge | category | points | difficulty | flag |
|---|---|---|---|---|---|---|
| Sweet Cookie — Base64 Cookie | GEMASTIK 2026 Warmup | Sweet Cookie | web | 500 | easy | GEMASTIK19{c00k13_b4s3_d3c0d3} |
Sweet Cookie (500 pts) — Web
URL: http://15.232.89.109:8002/
Server mengirim cookie session. Nilainya cuma di-encode Base64 (JSON):
import base64
# Cookie value from Set-Cookie header
cookie = "eyJ1c2V..." # nilai session cookie
decoded = base64.b64decode(cookie)
print(decoded)
# {"user": "guest", "flag": "GEMASTIK19{c00k13_b4s3_d3c0d3}"}
Flag
GEMASTIK19{c00k13_b4s3_d3c0d3}