Deserialization of Untrusted Data Affecting kibana package, versions >=8.10.0 <8.15.1

kibana is an open source (Apache Licensed), browser-based analytics and search dashboard for Elasticsearch.

Affected versions of this package are vulnerable to Deserialization of Untrusted Data via the parsing of a YAML document in the fleet plugin. An attacker can execute arbitrary code by supplying a crafted payload.

Note:

This is only exploitable if the attacker has specific Elasticsearch indices privileges and Kibana privileges:

1. Elasticsearch indices privileges: write privilege on the system indices .kibana_ingest and the allow_restricted_indices flag set to true;

2. Any of the following Kibana privileges: All privilege under Fleet, Read or Allprivilege under Integration, or access to thefleet-setup` privilege through the Fleet Server’s service account token.

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.

• Elastic Advisory
• GitHub Commit