Apache Dubbo Deserialization Vulnerability Gadgets Bypass

Vulnerability

Overview

CVE-2023-23638 is a critical deserialization vulnerability in Apache Dubbo's generic invoke functionality. The vulnerability stems from unsafe deserialization of untrusted data during generic service invocation, which allows an attacker to craft malicious serialized objects that, when processed, can trigger arbitrary code execution [1].

Attack

Vector and Exploitation

An attacker can exploit this vulnerability by sending specially crafted RPC requests to a Dubbo service that uses generic invocation. The attack requires network access to the Dubbo service endpoint, and no authentication is needed if the service is exposed without proper access controls [1]. The vulnerability affects all Dubbo versions in the 2.7.x (up to 2.7.21), 3.0.x (up to 3.0.13), and 3.1.x (up to 3.1.5) release lines.

Impact

Successful exploitation of this vulnerability could allow an attacker to execute arbitrary code on the Dubbo server. Since Dubbo is often used in microservice architectures and can handle sensitive business logic, full server compromise is possible, potentially leading to data breaches, service disruption, or lateral movement within the network [1].

Mitigation

Apache has addressed this vulnerability in Dubbo versions 2.7.22, 3.0.14, and 3.1.6, which are the fixed releases. Users are strongly advised to upgrade to these versions or later. There are no workarounds provided for unpatched versions [1].