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git is good

Point: 30

Category

Forensics https://ctflearn.com/challenge/104

Question

The flag used to be there. But then I redacted it. Good Luck. https://mega.nz/#!3CwDFZpJ!Jjr55hfJQJ5-jspnyrnVtqBkMHGJrd6Nn_QqM7iXEuc

Solution

The zip folder contained flag.txt file containing the flag. But it was redacted as per the given challenge. The folder also contained a .git file that contains the version history.

:~/gitIsGood@master bruceymac% cat flag.txt 
flag{REDACTED}
:~/gitIsGood@master bruceymac% ls -la
total 8
drwxr-xr-x@  4 bruceymac  staff   128 Oct 31  2016 .
drwx------@ 70 bruceymac  staff  2240 Jan 15 13:26 ..
drwxr-xr-x@ 13 bruceymac  staff   416 Jan 15 13:26 .git
-rw-r--r--@  1 bruceymac  staff    15 Oct 31  2016 flag.txt

Git's version history can be checked by below command

git log

From the log, previous version can be checked out with the guid using the command

% git checkout 195dd6
Note: checking out '195dd6'.

Afterwards, the flag can be retrived from the flag.txt file with simple cat command.

Improvement

None