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CVE PROGRAM SOURCE RECORD7.5 High

CVE-2021-3422

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Splunk Splunk Enterprise

  • 8.2 version(s) before 8.2.0affected
  • 8.1 version(s) before 8.1.3affected
  • 8.0 version(s) before 8.0.9affected
  • 7.3 version(s) before 7.3.9affected

References