CVE-2024-37285

A deserialization issue in Kibana can lead to arbitrary code execution when Kibana attempts to parse a YAML document containing a crafted payload. A successful attack requires a malicious user to have a combination of both specific Elasticsearch indices privileges https://www.elastic.co/guide/en/elasticsearch/reference/current/defining-roles.html#roles-indices-priv  and Kibana privileges https://www.elastic.co/guide/en/fleet/current/fleet-roles-and-privileges.html  assigned to them.

The following Elasticsearch indices permissions are required

• write privilege on the system indices .kibana_ingest*
• The allow_restricted_indices flag is set to true

Any of the following Kibana privileges are additionally required

• Under Fleet the All privilege is granted
• Under Integration the Read or All privilege is granted
• Access to the fleet-setup privilege is gained through the Fleet Server’s service account token

Weakness

The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.

Affected Software

Potential Mitigations

• Make fields transient to protect them from deserialization.
• An attempt to serialize and then deserialize a class containing transient fields will result in NULLs where the transient data should be. This is an excellent way to prevent time, environment-based, or sensitive variables from being carried over and used improperly.

Related Attack Patterns

• https://cwe.mitre.org/data/definitions/586.html

References

• https://discuss.elastic.co/t/kibana-8-15-1-security-update-esa-2024-27-esa-2024-28/366119