title: Indexer denial-of-service via malformed S2S request
description: The lack of validation of a key-value field in the Splunk-to-Splunk protocol results in a denial-of-service in Splunk Enterprise instances configured to index Universal Forwarder traffic. The vulnerability impacts Splunk Enterprise versions before 7.3.9, 8.0 versions before 8.0.9, and 8.1 versions before 8.1.3. It does not impact Universal Forwarders. When Splunk forwarding is secured using TLS or a Token, the attack requires compromising the certificate or token, or both. Implementation of either or both reduces the severity to Medium.
problem types: CWE-125 Out-of-bounds Read
affected:
{
product: Splunk Enterprise
vendor: Splunk
versions:
status: affected, version: 8.2 version(s) before 8.2.0
status: affected, version: 8.1 version(s) before 8.1.3
status: affected, version: 8.0 version(s) before 8.0.9
status: affected, version: 7.3 version(s) before 7.3.9
}
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
]