hxp CTF 2020


The CTF is over, thanks for playing! hxp <3 you! ๐Ÿ˜Š
This is a static mirror, we try to keep files online, but all services will be down.
If you want to hack the services, please check out the hxp CTF 2020 VM (Torrent).

Join us on IRC! freenode | #hxpctf - Stalk us on Twitter @hxpctf


by hlt

Difficulty estimate: hard - hard

Points: round(1000 ยท min(1, 10 / (9 + [3 solves]))) = 833 points


I’ve been waiting anxiously for a package… Do you know what I bought?

Note: If the binary segfaults, try using a newer kernel (we verified that it works on Linux 5.0 and later). Sorry about that!

Note 2: Please download the challenge again (or change the byte at file offset 0x9058 from 0x07 to 0x0f), we fixed an alignment issue on some versions of Ubuntu (thank you to Redford for reporting that one)!


restless-ba52b83c100b1ec2.tar.xz (25.8 KiB)


CTFtime Logo CTFtime: Task & Writeups

Solved by:

# Team Time
restless released 2020-12-18 15:00:00 +0000 UTC
๐Ÿฅ‡ pasten 2020-12-19 00:07:03 +0000 UTC
๐Ÿฅˆ Dragon Sector 2020-12-19 12:41:54 +0000 UTC
๐Ÿฅ‰ 5unkn0wn 2020-12-20 05:46:03 +0000 UTC