Juniors CTF - 100 - Black Suprematic Square - Web

Informations

Version

By Version Comment
noraj 1.0 Creation

CTF

Description

categories: trivial, web

M.Iu.Lupanov

source:

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[...]
<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

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[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.

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