# 11211 - Pentesting Memcache ## Protocol Information **Memcached** \(pronunciation: mem-cashed, mem-cash-dee\) is a general-purpose distributed [memory caching](https://en.wikipedia.org/wiki/Memory_caching) system. It is often used to speed up dynamic database-driven websites by caching data and objects in RAM to reduce the number of times an external data source \(such as a database or API\) must be read. \(From [wikipedia](https://en.wikipedia.org/wiki/Memcached)\) Although Memcached supports SASL, most instances are **exposed without authentication**. **Default port:** 11211 ```text PORT STATE SERVICE 11211/tcp open unknown ``` ## Enumeration ### Manual To ex-filtrate all the information saved inside a memcache instance you need to: 1. Find **slabs** with **active items** 2. Get the **key names** of the slabs detected before 3. Ex-filtrate the **saved data** by **getting the key names** Remember that this service is just a **cache**, so **data may be appearing and disappearing**. ```bash echo "version" | nc -vn -w 1 11211 #Get version echo "stats" | nc -vn -w 1 11211 #Get status echo "stats slabs" | nc -vn -w 1 11211 #Get slabs echo "stats items" | nc -vn -w 1 11211 #Get items of slabs with info echo "stats cachedump 0" | nc -vn -w 1 11211 #Get key names (the 0 is for unlimited output size) echo "get " | nc -vn -w 1 11211 #Get saved info #This php will just dump the keys, you need to use "get later" sudo apt-get install php-memcached php -r '$c = new Memcached(); $c->addServer("localhost", 11211); var_dump( $c->getAllKeys() );' ``` ### Manual2 ```bash sudo apt install libmemcached-tools memcstat --servers=127.0.0.1 #Get stats memcdump --servers=127.0.0.1 #Get all items memccat --servers=127.0.0.1 #Get info inside the item(s) ``` ### Automatic ```bash nmap -n -sV --script memcached-info -p 11211 #Just gather info msf > use auxiliary/gather/memcached_extractor #Extracts saved data msf > use auxiliary/scanner/memcached/memcached_amp #Check is UDP DDoS amplification attack is possible ``` ### **Shodan** * `port:11211 "STAT pid"` * `"STAT pid"`