zaq3m1hjx@mozmail.com's Time-Locked Authentication

Author:
zaq3m1hjx@mozmail.com

Language:
C/C++

Upload:
2025-11-22 10:07

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Platform:
Unix/linux etc.

Difficulty:
2.5

Quality:
4.0

Arch:
x86

Downloads:
135

Size:
14.13 KB

Writeups:
3

Comments:
9

Description

Password changes every millisecond, brute force impossible... think outside the password.

Comments (9)
Writeups (3)

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spitfire on 2025-11-24 00:26: [Click to reveal]

zaq3m1hjx@mozmail.com on 2025-11-24 06:41: @spitfire This is a cool solution. However, there's actually a much simpler approach that doesn't require any library hijacking

spitfire on 2025-11-24 17:00: Buffer overflow? It's cool too.

zaq3m1hjx@mozmail.com on 2025-11-24 20:42: Yes!

karabatik on 2025-12-06 00:05: Quick solve using IDA Pro. Checked the binary, found what I was looking for, patched one jump and done. LD_PRELOAD hooking would work too but didn't bother since the patch was easier. Fun challenge, thanks :=)

0xN0V4 on 2025-12-23 12:07: [Click to reveal]

zaq3m1hjx@mozmail.com on 2025-12-24 19:28: @0xN0V4 You're right, its because you can solve it without entering the actual password. The intended solution is to buffer overflow the string such that it overflows and writes 1 to the stack address of isAuthenticated

zaq3m1hjx@mozmail.com on 2025-12-24 19:37: @georgepaphitis great writeup!

mboyer on 2026-01-25 14:53: [Click to reveal]

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Solution by MaxVi on 2025-11-30 23:48:
Here is a write-up containing the to main methods that could be used to solve it. Very well detailed to allow beginners to understand clearly the solving path.

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Solution by birk_blog on 2025-12-04 13:42:
See also: https://birk.blog/crackme/69218b532d267f28f69b7fd3/

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Solution by georgepaphitis on 2025-12-15 14:22:

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crackmes.one

crackmes.one

zaq3m1hjx@mozmail.com's Time-Locked Authentication