Denial of Service in Splunk Enterprise Security of the Investigations manager through Investigation creation

Description

In Splunk Enterprise Security (ES) versions lower than 7.1.2, an attacker can create a malformed Investigation to perform a denial of service (DoS). The malformed investigation prevents the generation and rendering of the Investigations manager until it is deleted.
The vulnerability requires an authenticated session and access to create an Investigation. It only affects the availability of the Investigations manager, but without the manager, the Investigations functionality becomes unusable for most users.

Solution

Upgrade Splunk Enterprise Security (ES) to version 7.1.2, 7.2.0, 7.3.0 or higher.

Product Status

Mitigations and Workarounds

N/A

Detections

• Splunk ES DoS Investigations Manager via Investigation Creation

Severity

Splunk rates this vulnerability a 6.5, Medium, with a CVSSv3.1 vector of CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Acknowledgments

Eric LaMothe, Splunk