DDoS attacks - PHP hash vulnerability causes of

DDoS PHP Attacks Vulnerability Principle:

Rely on the appropriate language of the hashtable/hashmap is the implementation process (request more than this structure), when different key deposit if the hash values are equal while the linked list connected to the front. This exploits the collision the same hash is worth to a long linked list, re-get the map calculation process the time complexity of the huge increase, originally a simple process will become a very expensive cpu process.

Impact on: Read more