Java Deserialization vulnerability in Spring-Kafka When Improperly Configured

CVE-2023-34040

What is CVE-2023-34040?

In Spring for Apache Kafka 3.0.9 and earlier and versions 2.9.10 and earlier, a possible deserialization attack vector existed, but only if unusual configuration was applied. An attacker would have to construct a malicious serialized object in one of the deserialization exception record headers.

Specifically, an application is vulnerable when all of the following are true:

• The user does not configure an ErrorHandlingDeserializer for the key and/or value of the record
• The user explicitly sets container properties checkDeserExWhenKeyNull and/or checkDeserExWhenValueNull container properties to true.
• The user allows untrusted sources to publish to a Kafka topic

By default, these properties are false, and the container only attempts to deserialize the headers if an ErrorHandlingDeserializer is configured. The ErrorHandlingDeserializer prevents the vulnerability by removing any such malicious headers before processing the record.

News Articles

CN-SEC

CVE-2023-34040

漏洞预警 | Spring-Kafka反序列化漏洞

Spring for Apache Kafka（spring-kafka）项目是一个将Spring的核心概念应用于开发基于Kafka的消息传递解决方案。

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