Deserialization of Untrusted Data Affecting org.apache.shardingsphere:shardingsphere package, versions [,5.4.0)


Severity

Recommended
0.0
high
0
10

CVSS assessment made by Snyk's Security Team. Learn more

Threat Intelligence

Exploit Maturity
Not Defined
EPSS
0.07% (35th percentile)

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  • Snyk IDSNYK-JAVA-ORGAPACHESHARDINGSPHERE-5795537
  • published20 Jul 2023
  • disclosed20 Jul 2023
  • creditLiav Gutman

Introduced: 20 Jul 2023

CVE-2023-28754  (opens in a new tab)
CWE-502  (opens in a new tab)

How to fix?

Upgrade org.apache.shardingsphere:shardingsphere to version 5.4.0 or higher.

Overview

Affected versions of this package are vulnerable to Deserialization of Untrusted Data which allows attackers to execute arbitrary code by constructing a special YAML configuration file. An attacker can use SnakeYAML to deserialize java.net.URLClassLoader and make it load a JAR from a specified URL, and then deserialize javax.script.ScriptEngineManager to load code using that ClassLoader. When the ShardingSphere JVM process starts and uses the ShardingSphere-Agent, the arbitrary code specified by the attacker will be executed during the deserialization of the YAML configuration file by the Agent.

Note:

The attacker needs to have permission to modify the ShardingSphere Agent YAML configuration file on the target machine, and the target machine can access the URL with the arbitrary code JAR.

Details

Serialization is a process of converting an object into a sequence of bytes which can be persisted to a disk or database or can be sent through streams. The reverse process of creating object from sequence of bytes is called deserialization. Serialization is commonly used for communication (sharing objects between multiple hosts) and persistence (store the object state in a file or a database). It is an integral part of popular protocols like Remote Method Invocation (RMI), Java Management Extension (JMX), Java Messaging System (JMS), Action Message Format (AMF), Java Server Faces (JSF) ViewState, etc.

Deserialization of untrusted data (CWE-502) is when the application deserializes untrusted data without sufficiently verifying that the resulting data will be valid, thus allowing the attacker to control the state or the flow of the execution.

CVSS Scores

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