CVE-2020-1947 : Vulnerability Insights and Analysis

Apache ShardingSphere(incubator) 4.0.0-RC3 and 4.0.0 are affected by a Remote Code Execution vulnerability due to untrusted data unmarshalling with SnakeYAML.

Understanding CVE-2020-1947

In Apache ShardingSphere(incubator) 4.0.0-RC3 and 4.0.0, a security flaw exists in the web console that can lead to Remote Code Execution (RCE) due to improper handling of untrusted data.

What is CVE-2020-1947?

In Apache ShardingSphere(incubator) versions 4.0.0-RC3 and 4.0.0, the vulnerability arises from the usage of the SnakeYAML library in the web console to parse YAML inputs for loading datasource configurations. This allows untrusted data to be unmarshalled to a Java type using YAML tags, potentially leading to RCE.

The Impact of CVE-2020-1947

The security issue in Apache ShardingSphere can result in Remote Code Execution (RCE) attacks when untrusted data is processed, posing significant risks to the confidentiality, integrity, and availability of systems.

Technical Details of CVE-2020-1947

Apache ShardingSphere(incubator) 4.0.0-RC3 and 4.0.0 are susceptible to the following:

Vulnerability Description

The web console of ShardingSphere uses the SnakeYAML library for parsing YAML inputs, allowing unmarshalling of untrusted data using YAML tags, leading to RCE.

Affected Systems and Versions

Product: Apache ShardingSphere(incubator)
Vendor: Apache Software Foundation
Versions: 4.0.0-RC3, 4.0.0

Exploitation Mechanism

Attackers can exploit this vulnerability by crafting malicious YAML inputs to execute arbitrary code on the target system, potentially compromising its security.

Mitigation and Prevention

Immediate Steps to Take:

Upgrade to a patched version that addresses the vulnerability.
Implement input validation to prevent untrusted data from being processed as code. Long-Term Security Practices:
Regularly monitor and update software components to mitigate potential security risks.
Train developers on secure coding practices to prevent similar vulnerabilities in the future.

Patching and Updates

Apache ShardingSphere users are advised to apply the latest patches provided by the vendor to fix the RCE vulnerability.