CVE-2021-3422: Indexer denial-of-service via malformed S2S request
First published: Fri Mar 25 2022(Updated: )
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.
Credit: prodsec@splunk.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Splunk Splunk | <7.3.9 | |
| Splunk Splunk | >=8.0<8.0.9 | |
| Splunk Splunk | >=8.1<8.1.3 |
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Reference Links
- collector/nvd-index
- agent/references
- agent/type
- agent/softwarecombine
- collector/mitre-cve
- source/MITRE
- agent/author
- agent/severity
- agent/last-modified-date
- agent/title
- agent/weakness
- agent/description
- agent/first-publish-date
- agent/tags
- agent/event
- vendor/splunk
- canonical/splunk splunk
- version/splunk splunk/8.0
- version/splunk splunk/8.1