Apache Dubbo: Bypass deny serialize list check in Apache Dubbo

Vulnerability

Overview

CVE-2023-46279 is a deserialization of untrusted data vulnerability in Apache Dubbo 3.1.5, which bypasses the deny-serialization-list mechanism [1][3]. The root cause lies in improper validation during deserialization of untrusted data, allowing an attacker to provide crafted serialized objects that should have been blocked [3].

Exploitation

An attacker can exploit this vulnerability by sending malicious serialized data to an affected Apache Dubbo service. The attack requires network access to the Dubbo endpoint, but does not require authentication [3]. The bypass of the deny list means that certain dangerous classes or patterns that are normally forbidden can be deserialized, potentially leading to arbitrary code execution [3].

Impact

Successful exploitation could allow an attacker to achieve remote code execution (RCE) within the context of the Dubbo server process [3]. This can lead to full compromise of the application and underlying infrastructure, including data theft, service disruption, or further lateral movement within the network.

Mitigation

Users of Apache Dubbo 3.1.5 are strongly advised to upgrade to the latest version of Dubbo, which includes a fix for this vulnerability [1][3]. As of the publication date, no known workarounds have been published; upgrading is the only mitigation [3].