This year, DEF CON 21 CTF Quals were hosted by Legitimate Business Syndicate. Really nice organization and, as promised, no more « guessing » challenges! Quals ended at 02:00 june 17 morning… and Routards team finished 6th and thus are qualified for the final CTF in Vegas!
Among classical sploits, pwning and reverse categories, there were web-based and programming challenges, which were not so difficult…
“3dub”, web-based challenges
At present, some challenge websites are still playable!
- (01) badmedicine (writeup)
- (02) babysfirst (writeup)
- (03) hypeman (writeup)
- (04) rememberme (writeup)
- (05) worsemedicine (writeup)
“0x41414141”, exploitation
- (01) bitterswallow
- (02) blackbox
- (03) ergab
- (04) annyong
- (05) yolo
“\xff\xe4\xcc”, shellcode
- (01) incest
- (02) blackjack
- (03) linked (writeup to come)
- (04) penser
- (05) lena
“OMGACM”, guerilla programming
- (01) pieceofeight
- (02) diehard
- (03) grandprix (writeup to come)
- (04) bob
- (05) passweird
“gnireenigne”, reverse engineering
- (01) policebox
- (02) thyself
- (03) musicman
- (04) timecubed
- (05) tastycloud