CVE-2021-33790 : What You Need to Know
Learn about CVE-2021-33790, a critical vulnerability in RebornCore library allowing remote code execution. Understand the impact, affected versions, exploitation, and mitigation steps.
The RebornCore library before version 4.7.3 is vulnerable to remote code execution, allowing attackers to instantiate any class with any data due to deserialization of untrusted data. This can lead to potential exploitation based on the Minecraft modifications present.
Understanding CVE-2021-33790
This section will cover the essential details of the CVE-2021-33790 vulnerability.
What is CVE-2021-33790?
The CVE-2021-33790 vulnerability exists in the RebornCore library before version 4.7.3, enabling remote code execution by deserializing untrusted data, potentially leading to class instantiation with any data.
The Impact of CVE-2021-33790
The impact of this vulnerability is severe as it allows attackers to execute arbitrary code, manipulate data, and potentially compromise systems utilizing the affected library.
Technical Details of CVE-2021-33790
In this section, we will delve into the technical aspects of CVE-2021-33790.
Vulnerability Description
The vulnerability arises due to the improper deserialization of untrusted data in ObjectInputStream.readObject within reborncore.common.network.ExtendedPacketBuffer, allowing malicious actors to instantiate classes with any data.
Affected Systems and Versions
The RebornCore library versions prior to 4.7.3 are affected by CVE-2021-33790.
Exploitation Mechanism
Attackers can exploit this vulnerability by leveraging the deserialization flaw to instantiate classes on the classpath with arbitrary data, potentially leading to unauthorized code execution.
Mitigation and Prevention
This section will outline the steps to mitigate and prevent exploitation of the CVE-2021-33790 vulnerability.
Immediate Steps to Take
Users should update the RebornCore library to version 4.7.3 or above to mitigate the vulnerability and ensure system security.
Long-Term Security Practices
Implement secure coding practices, perform regular security audits, and monitor for any unusual activity to enhance long-term security.
Patching and Updates
Stay informed about security advisories and patches released by the library maintainers to address vulnerabilities promptly and maintain a secure environment.