CVE-2021-36163 : Security Advisory and Response

Apache Dubbo versions 2.7.x and 2.6.x are affected by an unsafe deserialization vulnerability when using the Hessian protocol. Attackers can achieve remote code execution by tampering with the serialization ID on the server side. This issue is fixed in versions 2.7.13 and 2.6.10.1.

Understanding CVE-2021-36163

This CVE identifies the unsafe deserialization vulnerability in Apache Dubbo providers utilizing the Hessian protocol.

What is CVE-2021-36163?

In Apache Dubbo, the Hessian protocol is susceptible to remote code execution due to improper handling of serialization IDs. Attackers can exploit this to execute malicious code on the server.

The Impact of CVE-2021-36163

The vulnerability allows attackers to manipulate serialization IDs, leading to unauthorized remote code execution on affected systems.

Technical Details of CVE-2021-36163

This section delves into the specific technical aspects of the CVE.

Vulnerability Description

The issue arises when HessianSkeleton objects are created without proper serialization factory configuration, exposing services to malicious actors.

Affected Systems and Versions

Apache Dubbo versions 2.7.x and 2.6.x are impacted by this vulnerability.

Exploitation Mechanism

Attackers manipulate serialization IDs through the Hessian protocol, enabling unauthorized remote code execution.

Mitigation and Prevention

Learn how to mitigate and prevent exploitation of CVE-2021-36163.

Immediate Steps to Take

Update Apache Dubbo to versions 2.7.13 and 2.6.10.1 to patch the vulnerability and prevent remote code execution.

Long-Term Security Practices

Implement secure serialization practices and regular security updates to protect against potential exploits.

Patching and Updates

Regularly apply security patches and updates provided by Apache Software Foundation to maintain a secure environment.