In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applicationsLearn about Denial of Service (DoS) vulnerabilities in an interactive lesson.
Start learningUpgrade pocketmine/pocketmine-mp
to version 4.0.5, 3.26.5 or higher.
pocketmine/pocketmine-mp is a highly customisable, open source server software for Minecraft: Bedrock Edition written in PHP
Affected versions of this package are vulnerable to Denial of Service (DoS). Book page text, count, and author/title length is not limited in PocketMine-MP. In addition, the maximum of 50 pages is also not enforced, meaning that players can create "book bombs."
This does, however, require that an attacker obtain a writable book in the first place in order to exploit the problem.
A workaround is to ban writable books, or use a plugin to make PlayerEditBookEvent
to cancel the event if strlen(text) > 1024 || mb_strlen(text) > 256
.
Denial of Service (DoS) describes a family of attacks, all aimed at making a system inaccessible to its intended and legitimate users.
Unlike other vulnerabilities, DoS attacks usually do not aim at breaching security. Rather, they are focused on making websites and services unavailable to genuine users resulting in downtime.
One popular Denial of Service vulnerability is DDoS (a Distributed Denial of Service), an attack that attempts to clog network pipes to the system by generating a large volume of traffic from many machines.
When it comes to open source libraries, DoS vulnerabilities allow attackers to trigger such a crash or crippling of the service by using a flaw either in the application code or from the use of open source libraries.
Two common types of DoS vulnerabilities:
High CPU/Memory Consumption- An attacker sending crafted requests that could cause the system to take a disproportionate amount of time to process. For example, commons-fileupload:commons-fileupload.
Crash - An attacker sending crafted requests that could cause the system to crash. For Example, npm ws
package