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+---
+title: "umdctf2024 - Donations Fixed"
+date: 2024-04-28T19:18:00-03:00
+draft: false
+description: ""
+tags: ["web", "ctf"]
+---
+
+
+This is the harder version of [donations](/writeups/umdctf-2024-donations-fixed), it's the same challenge, but you can't donate negative amounts this time.
+
+After playing with it for a while, I realized that the solution was probably to find a way to donate money to your user, bypassing that Jeff Bezos check. So I tested adding more user id's in the `to` parameter and the money went to them.
+
+So the solution was to create users, and donate all of their money to a user which will retrieve the flag.
+
+```http
+POST /api/donate HTTP/2
+Host: donations2-api.challs.umdctf.io
+Cookie: session=...
+Content-Length: 36
+Content-Type: application/x-www-form-urlencoded
+
+to=lisanalgaib&to=gbrls&currency=999
+```