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Start learningUpgrade pocketmine/pocketmine-mp
to version 4.8.1 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) due to improper user input validation, it is possible to provide an invalid input to the DyeColorIdMap->fromId()
function. An attacker could exploit this vulnerability to crash a server by providing NBT with invalid values for pattern colors in an inventory transaction or by using /give
to obtain an item with NBT like this.
This is quite difficult to work around via a plugin. Theoretically, it's possible to override the Banner
item class from a plugin and validate the data before it reaches deserializeCompoundTag()
.
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