[WarGame] Bandit, Level 6 → Level 7

[WarGame] Bandit, Level 6 → Level 7

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Problem

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user가 bandit7이고, group이 bandit6이며 size가 33바이트인 파일을 찾으면 된다.

find --help로 옵션 확인하면 금방 될 듯 합니다.

 

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Solving

bandit6@bandit:~$ find --help | grep user
      -nouser -nogroup -path PATTERN -perm [-/]MODE -regex PATTERN
      -used N -user NAME -xtype [bcdpfls]      -context CONTEXT
bandit6@bandit:~$ find --help | grep group
      -cnewer FILE -ctime N -empty -false -fstype TYPE -gid N -group NAME
      -nouser -nogroup -path PATTERN -perm [-/]MODE -regex PATTERN
https://savannah.gnu.org/bugs/?group=findutils or, if
bandit6@bandit:~$ find --help | grep size
      -wholename PATTERN -size N[bcwkMG] -true -type [bcdpflsD] -uid N
bandit6@bandit:~$ cat `find /* -user bandit7 -group bandit6 -size 33c 2>/dev/null`
z7WtoNQU2XfjmMtWA8u5rN4vzqu4v99S

 

• 2>/dev/null : return code (2) 오류인 경우, 제거함
• ` ~~~ ` : backtic 내부의 코드는 먼저 실행

 

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Refer 

https://overthewire.org/wargames/bandit/bandit7.html