Critical Apache Dubbo RCE (CVE‑2020‑1948): Threat Details & Fixes
The 2020‑06‑23 security advisory reveals that Apache Dubbo versions 2.5.x, 2.6.0‑2.6.7, and 2.7.0‑2.7.6 contain a high‑severity deserialization vulnerability (CVE‑2020‑1948) allowing remote code execution, outlines its impact, provides affected version details, risk assessment, remediation steps, and references to mapping data and product‑level mitigation.
0x01 Vulnerability Background
On June 23, 2020, 360CERT reported that Apache Dubbo issued an advisory for a remote code execution vulnerability (CVE‑2020‑1948) classified as high severity.
Apache Dubbo is a high‑performance, lightweight open‑source Java RPC framework offering three core capabilities: interface‑based remote method invocation, intelligent fault tolerance and load balancing, and automatic service registration and discovery.
The Dubbo Provider suffers from a deserialization flaw; attackers can send RPC requests with unrecognized service or method names and malicious payloads, which, when deserialized, lead to remote code execution.
The technical details of the vulnerability have been publicly disclosed.
360CERT recommends users promptly apply the latest patches, conduct asset self‑assessment, and implement preventive measures to avoid exploitation.
0x02 Risk Level
Threat level: High
Impact scope: Wide
0x03 Vulnerability Details
The Apache Dubbo Provider contains a deserialization vulnerability that allows attackers to execute remote code by sending malicious RPC payloads.
0x04 Affected Versions
Dubbo 2.7.0 – 2.7.6
Dubbo 2.6.0 – 2.6.7
Dubbo 2.5.x (no longer maintained)
0x05 Remediation Recommendations
General Fix Advice:
Users should upgrade to Dubbo 2.7.7 or later. Download link: https://github.com/apache/dubbo/releases/tag/dubbo-2.7.7.
0x06 Related Cyber Mapping Data
360 Security Brain’s Quake network mapping system shows extensive domestic usage of Dubbo, as illustrated below.
0x07 Product‑Side Solution
360 City‑Level Network Security Monitoring Service
The QUake asset mapping platform monitors such vulnerabilities; users should contact the relevant product team for appropriate solutions.
0x08 Timeline
2020‑06‑22: Apache Dubbo official announcement
2020‑06‑23: 360CERT warning released
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Programmer DD
A tinkering programmer and author of "Spring Cloud Microservices in Action"
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