In Splunk Enterprise versions below 9.0.5, 8.2.11, and 8.1.14, an attacker can exploit a vulnerability in the dump SPL command to cause a Denial of Service by crashing the Splunk daemon.
- Type: Hunting
Product: Splunk Enterprise
- Last Updated: 2023-05-10
- Author: Rod Soto
- ID: fb0e6823-365f-48ed-b09e-272ac4c1dad6
Kill Chain Phase
- Actions On Objectives
- CIS 10
1 2 3 `splunk_crash_log` "*Segmentation fault*" | stats count by host _time | `splunk_dos_via_dump_spl_command_filter`
The SPL above uses the following Macros:
splunk_dos_via_dump_spl_command_filter is a empty macro by default. It allows the user to filter out any results (false positives) without editing the SPL.
List of fields required to use this analytic.
How To Implement
This search does not require additional ingestion of data. Requires the ability to search _internal index and monitor segmentation faults.
Known False Positives
Segmentation faults may occur due to other causes, so this search may produce false positives
Associated Analytic Story
|100.0||100||100||Possible denial of service attack with Victim $host$|
The Risk Score is calculated by the following formula: Risk Score = (Impact * Confidence/100). Initial Confidence and Impact is set by the analytic author.
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