writeups

Juniors CTF - 100 - Black Suprematic Square - Web

noraj (Alexandre ZANNI)
, , ,
🇬🇧

Information#

Version#

By Version Comment
noraj 1.0 Creation

CTF#

Description#

categories: trivial, web

M.Iu.Lupanov

source:

1
2
3
4
5
6
7
8
9
[...]
<div id="task_header">Black Suprematic Square</div>
<div id="task_body">
  <center>
    <div style="width: 478px;">
<img src = "http://juniors.ucoz.net/Black_Suprematic_Square.jpg" >
<img src = "http://juniors.ucoz.net/Black_And_White_Symbols.jpg" width=0>
</div>
[...]

This image was hidden.

Solution#

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
[noraj@rawsec]––––––––––––––––––––––––––––––––––––––––––––[~/CTF/JuniorCTF/2016]
$ exiftool Black-Suprematic-Square/Black_And_White_Symbols.jpg
ExifTool Version Number         : 10.20
File Name                       : Black_And_White_Symbols.jpg
Directory                       : Black-Suprematic-Square
File Size                       : 76 kB
File Modification Date/Time     : 2016:11:22 02:19:51+01:00
File Access Date/Time           : 2016:11:25 16:15:54+01:00
File Inode Change Date/Time     : 2016:11:25 16:15:54+01:00
File Permissions                : rw-r--r--
File Type                       : JPEG
File Type Extension             : jpg
MIME Type                       : image/jpeg
JFIF Version                    : 1.01
Resolution Unit                 : inches
X Resolution                    : 72
Y Resolution                    : 72
Comment                         : aima0AiwahsidupaiToehoong1PhieruqueivahphieKah7uceetair9aiGae1eSsaedoo4becooShohhu8eifahXi7EJoh2gaephechei5chiP9
Image Width                     : 477
Image Height                    : 406
Encoding Process                : Progressive DCT, Huffman coding
Bits Per Sample                 : 8
Color Components                : 3
Y Cb Cr Sub Sampling            : YCbCr4:4:4 (1 1)
Image Size                      : 477x406
Megapixels                      : 0.194

aima0AiwahsidupaiToehoong1PhieruqueivahphieKah7uceetair9aiGae1eSsaedoo4becooShohhu8eifahXi7EJoh2gaephechei5chiP9 was the flag.

Feedback: no flag format, flag are meaningless so it may be hard to know when you get the flag or not, they need to use a flag format or give in the description what the flag have to look like.

Share