What’s Vulnerable › Vulnerabilities

CVE-2022-32153: Splunk Enterprise lacked TLS host name validation

• Severity: high (CVSS 8.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-06-15 · updated 2026-06-17
• Weakness: CWE-297

Description

Splunk Enterprise peers in Splunk Enterprise versions before 9.0 and Splunk Cloud Platform versions before 8.2.2203 did not validate the TLS certificates during Splunk-to-Splunk communications by default. Splunk peer communications configured properly with valid certificates were not vulnerable. However, an attacker with administrator credentials could add a peer without a valid certificate and connections from misconfigured nodes without valid certificates did not fail by default. For Splunk Enterprise, update to Splunk Enterprise version 9.0 and Configure TLS host name validation for Splunk-to-Splunk communications (https://docs.splunk.com/Documentation/Splunk/9.0.0/Security/EnableTLSCertHostnameValidation) to enable the remediation.

Affected products

• Splunk Enterprise: before 9.0 — fixed in 9.0
• Splunk Cloud Platform: before 8.2.2203 — fixed in 8.2.2203

How to fix

Upgrade to a fixed version: Splunk Enterprise 9.0; Splunk Cloud Platform 8.2.2203. Check the vendor advisory for mitigations.

References

• https://docs.splunk.com/Documentation/Splunk/9.0.0/Security/EnableTLSCertHostnameValidation
• https://docs.splunk.com/Documentation/Splunk/9.0.0/Security/Updates
• https://research.splunk.com/application/splunk_digital_certificates_infrastructure_version/
• https://research.splunk.com/application/splunk_digital_certificates_lack_of_encryption/
• https://research.splunk.com/application/splunk_protocol_impersonation_weak_encryption_selfsigned/
• https://research.splunk.com/network/splunk_identified_ssl_tls_certificates/
• https://www.splunk.com/en_us/product-security/announcements/svd-2022-0603.html
• https://docs.splunk.com/Documentation/Splunk/9.0.0/Security/EnableTLSCertHostnameValidation
• https://docs.splunk.com/Documentation/Splunk/9.0.0/Security/Updates
• https://research.splunk.com/application/splunk_digital_certificates_infrastructure_version/
• https://research.splunk.com/application/splunk_digital_certificates_lack_of_encryption/
• https://research.splunk.com/application/splunk_protocol_impersonation_weak_encryption_selfsigned/

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