Vulnerability Details CVE-2021-3422
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.004
EPSS Ranking 59.6%
CVSS Severity
CVSS v3 Score 7.5
CVSS v2 Score 4.3
Products affected by CVE-2021-3422
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cpe:2.3:a:splunk:splunk:*
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cpe:2.3:a:splunk:splunk:4.3
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cpe:2.3:a:splunk:splunk:4.3.0
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cpe:2.3:a:splunk:splunk:4.3.1
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cpe:2.3:a:splunk:splunk:4.3.2
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cpe:2.3:a:splunk:splunk:4.3.3
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cpe:2.3:a:splunk:splunk:4.3.4
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cpe:2.3:a:splunk:splunk:4.3.5
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cpe:2.3:a:splunk:splunk:4.3.6
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cpe:2.3:a:splunk:splunk:4.3.7
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cpe:2.3:a:splunk:splunk:5.0.0
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cpe:2.3:a:splunk:splunk:5.0.1
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cpe:2.3:a:splunk:splunk:5.0.10
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cpe:2.3:a:splunk:splunk:5.0.11
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cpe:2.3:a:splunk:splunk:5.0.12
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cpe:2.3:a:splunk:splunk:5.0.13
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cpe:2.3:a:splunk:splunk:5.0.14
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cpe:2.3:a:splunk:splunk:5.0.15
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cpe:2.3:a:splunk:splunk:5.0.16
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cpe:2.3:a:splunk:splunk:5.0.17
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cpe:2.3:a:splunk:splunk:5.0.18
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cpe:2.3:a:splunk:splunk:5.0.2
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cpe:2.3:a:splunk:splunk:5.0.3
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cpe:2.3:a:splunk:splunk:5.0.4
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cpe:2.3:a:splunk:splunk:5.0.5
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cpe:2.3:a:splunk:splunk:5.0.6
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cpe:2.3:a:splunk:splunk:5.0.7
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cpe:2.3:a:splunk:splunk:5.0.8
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cpe:2.3:a:splunk:splunk:5.0.9
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cpe:2.3:a:splunk:splunk:6.0.0
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cpe:2.3:a:splunk:splunk:6.0.1
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cpe:2.3:a:splunk:splunk:6.0.10
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cpe:2.3:a:splunk:splunk:6.0.11
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cpe:2.3:a:splunk:splunk:6.0.12
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cpe:2.3:a:splunk:splunk:6.0.13
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cpe:2.3:a:splunk:splunk:6.0.14
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cpe:2.3:a:splunk:splunk:6.0.15
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cpe:2.3:a:splunk:splunk:6.0.2
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cpe:2.3:a:splunk:splunk:6.0.3
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cpe:2.3:a:splunk:splunk:6.0.4
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cpe:2.3:a:splunk:splunk:6.0.5
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cpe:2.3:a:splunk:splunk:6.0.6
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cpe:2.3:a:splunk:splunk:6.0.7
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cpe:2.3:a:splunk:splunk:6.0.8
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cpe:2.3:a:splunk:splunk:6.0.9
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cpe:2.3:a:splunk:splunk:6.1.0
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cpe:2.3:a:splunk:splunk:6.1.1
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cpe:2.3:a:splunk:splunk:6.1.10
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cpe:2.3:a:splunk:splunk:6.1.11
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cpe:2.3:a:splunk:splunk:6.1.12
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cpe:2.3:a:splunk:splunk:6.1.13
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cpe:2.3:a:splunk:splunk:6.1.14
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cpe:2.3:a:splunk:splunk:6.1.2
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cpe:2.3:a:splunk:splunk:6.1.3
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cpe:2.3:a:splunk:splunk:6.1.4
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cpe:2.3:a:splunk:splunk:6.1.5
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cpe:2.3:a:splunk:splunk:6.1.6
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cpe:2.3:a:splunk:splunk:6.1.7
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cpe:2.3:a:splunk:splunk:6.1.8
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cpe:2.3:a:splunk:splunk:6.1.9
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cpe:2.3:a:splunk:splunk:6.2.0
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cpe:2.3:a:splunk:splunk:6.2.1
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cpe:2.3:a:splunk:splunk:6.2.10
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cpe:2.3:a:splunk:splunk:6.2.11
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cpe:2.3:a:splunk:splunk:6.2.12
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cpe:2.3:a:splunk:splunk:6.2.13
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cpe:2.3:a:splunk:splunk:6.2.14
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cpe:2.3:a:splunk:splunk:6.2.15
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cpe:2.3:a:splunk:splunk:6.2.2
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cpe:2.3:a:splunk:splunk:6.2.3
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cpe:2.3:a:splunk:splunk:6.2.4
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cpe:2.3:a:splunk:splunk:6.2.5
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cpe:2.3:a:splunk:splunk:6.2.6
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cpe:2.3:a:splunk:splunk:6.2.7
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cpe:2.3:a:splunk:splunk:6.2.8
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cpe:2.3:a:splunk:splunk:6.2.9
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cpe:2.3:a:splunk:splunk:6.3.0
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cpe:2.3:a:splunk:splunk:6.3.1
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cpe:2.3:a:splunk:splunk:6.3.10
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cpe:2.3:a:splunk:splunk:6.3.11
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cpe:2.3:a:splunk:splunk:6.3.12
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cpe:2.3:a:splunk:splunk:6.3.13
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cpe:2.3:a:splunk:splunk:6.3.14
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cpe:2.3:a:splunk:splunk:6.3.2
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cpe:2.3:a:splunk:splunk:6.3.3
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cpe:2.3:a:splunk:splunk:6.3.4
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cpe:2.3:a:splunk:splunk:6.3.5
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cpe:2.3:a:splunk:splunk:6.3.6
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cpe:2.3:a:splunk:splunk:6.3.7
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cpe:2.3:a:splunk:splunk:6.3.8
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cpe:2.3:a:splunk:splunk:6.3.9
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cpe:2.3:a:splunk:splunk:6.4.0
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cpe:2.3:a:splunk:splunk:6.4.1
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cpe:2.3:a:splunk:splunk:6.4.10
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cpe:2.3:a:splunk:splunk:6.4.11
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cpe:2.3:a:splunk:splunk:6.4.2
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cpe:2.3:a:splunk:splunk:6.4.3
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cpe:2.3:a:splunk:splunk:6.4.4
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cpe:2.3:a:splunk:splunk:6.4.5
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cpe:2.3:a:splunk:splunk:6.4.6
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cpe:2.3:a:splunk:splunk:6.4.7
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cpe:2.3:a:splunk:splunk:6.4.8
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cpe:2.3:a:splunk:splunk:6.4.9
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cpe:2.3:a:splunk:splunk:6.5.0
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cpe:2.3:a:splunk:splunk:6.5.1
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cpe:2.3:a:splunk:splunk:6.5.10
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cpe:2.3:a:splunk:splunk:6.5.2
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cpe:2.3:a:splunk:splunk:6.5.3
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cpe:2.3:a:splunk:splunk:6.5.4
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cpe:2.3:a:splunk:splunk:6.5.5
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cpe:2.3:a:splunk:splunk:6.5.6
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cpe:2.3:a:splunk:splunk:6.5.7
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cpe:2.3:a:splunk:splunk:6.5.8
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cpe:2.3:a:splunk:splunk:6.5.9
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cpe:2.3:a:splunk:splunk:6.6.0
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cpe:2.3:a:splunk:splunk:6.6.1
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cpe:2.3:a:splunk:splunk:6.6.10
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cpe:2.3:a:splunk:splunk:6.6.11
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cpe:2.3:a:splunk:splunk:6.6.12
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cpe:2.3:a:splunk:splunk:6.6.2
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cpe:2.3:a:splunk:splunk:6.6.3
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cpe:2.3:a:splunk:splunk:6.6.4
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cpe:2.3:a:splunk:splunk:6.6.5
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cpe:2.3:a:splunk:splunk:6.6.6
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cpe:2.3:a:splunk:splunk:6.6.7
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cpe:2.3:a:splunk:splunk:6.6.8
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cpe:2.3:a:splunk:splunk:6.6.9
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cpe:2.3:a:splunk:splunk:7.0.0
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cpe:2.3:a:splunk:splunk:7.0.1
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cpe:2.3:a:splunk:splunk:7.0.2
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cpe:2.3:a:splunk:splunk:7.0.3
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cpe:2.3:a:splunk:splunk:7.0.4
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cpe:2.3:a:splunk:splunk:7.0.5
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cpe:2.3:a:splunk:splunk:7.0.6
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cpe:2.3:a:splunk:splunk:7.0.7
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cpe:2.3:a:splunk:splunk:7.0.8
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cpe:2.3:a:splunk:splunk:7.0.9
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cpe:2.3:a:splunk:splunk:7.1.0
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cpe:2.3:a:splunk:splunk:7.1.1
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cpe:2.3:a:splunk:splunk:7.1.2
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cpe:2.3:a:splunk:splunk:7.1.3
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cpe:2.3:a:splunk:splunk:7.1.4
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cpe:2.3:a:splunk:splunk:7.1.5
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cpe:2.3:a:splunk:splunk:7.1.6
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cpe:2.3:a:splunk:splunk:7.2.0
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cpe:2.3:a:splunk:splunk:7.2.1
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cpe:2.3:a:splunk:splunk:7.2.2
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cpe:2.3:a:splunk:splunk:7.2.3
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cpe:2.3:a:splunk:splunk:7.2.4
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cpe:2.3:a:splunk:splunk:7.2.5
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cpe:2.3:a:splunk:splunk:8.1.0
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cpe:2.3:a:splunk:splunk:8.1.1
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cpe:2.3:a:splunk:splunk:8.1.2