title: Indexing blockage via malformed data sent through S2S or HEC protocols in Splunk Enterprise
description: In Splunk Enterprise versions below 8.2.9, 8.1.12, and 9.0.2, sending a malformed file through the Splunk-to-Splunk (S2S) or HTTP Event Collector (HEC) protocols to an indexer results in a blockage or denial-of-service preventing further indexing.
problem types: CWE-400
affected:
{
defaultStatus: affected
product: Splunk Enterprise
vendor: Splunk
versions:
lessThan: 8.1.12, status: affected, version: 8.1, versionType: custom
lessThan: 8.2.9, status: affected, version: 8.2, versionType: custom
lessThan: 9.0.2, status: affected, version: 9.0, versionType: custom
}
metrics:
cvssV3_1: [
attackComplexity: LOW
attackVector: NETWORK
availabilityImpact: HIGH
baseScore: 7.5
baseSeverity: HIGH
confidentialityImpact: NONE
integrityImpact: NONE
privilegesRequired: NONE
scope: UNCHANGED
userInteraction: NONE
vectorString: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
version: 3.1
]
format: CVSS
scenarios: GENERAL