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Memcached Log Analysis
infra-memcache | Level: Easy | Total Lab Runs: 0 | Premium Lab |
A web application server uses Memcached to improve user experience and server performance. The web application retrieves the data from the Memcached server by maintaining an active connection.
In this challenge, the Memcached logs are provided. Analyze the logs and answer the following questions:
- Find the total number of connections made to the Memcached server excluding the connection made by the web application.
- How many slabs did the attacker enumerate using the command “stats cachedump”?
- How many unique key-value pairs were dumped by malicious connections? Assuming that only valid user is the web application.
- The web application logic updates a set of essential key-value pairs if any key-value pair of this set is invalidated/deleted/expired. The attacker can leverage such behavior to increase the performance of the web application sometimes leading to DoS. In the provided logs, an attacker has tried to do the same by invalidating a key-value pair. What is the name of that key?
- An open Memcached server can be used to perform reflected DDoS attack on a 3rd party server. And, to increase the multiplication factor of the attack, the attacker generally updates/insert a key-value pair with a large value. A similar attempt has been logged in provided logs. What is the name of the key which is used to store a large value?
| Verify: | ||
|---|---|---|
| 1. | Find the total number of connections made to the Memcached server excluding the connection made by the web application. |
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| 2. | How many slabs did the attacker enumerate using the command “stats cachedump”? |
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| 3. | How many unique key-value pairs were dumped by malicious connections? Assuming that only valid user is the web application. |
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| 4. | What is the name of that key? |
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| 5. | What is the name of the key which is used to store a large value? |
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