Denial of Service (DoS) through Multiple LDAP Bind Requests in Splunk Enterprise

Summary

In Splunk Enterprise versions below 10.0.1, 9.4.4, 9.3.6, and 9.2.8, and Splunk Cloud Platform versions below 9.3.2411.108, 9.3.2408.118 and 9.2.2406.123, a user who holds a role that contains the high-privilege capability `change_authentication`, could send multiple LDAP bind requests to a specific internal endpoint, resulting in high server CPU usage, which could potentially lead to a denial of service (DoS) until the Splunk Enterprise instance is restarted. See https://help.splunk.com/en/splunk-enterprise/administer/manage-users-and-security/10.0/manage-splunk-platform-users-and-roles/define-roles-on-the-splunk-platform-with-capabilities and https://help.splunk.com/en/splunk-enterprise/administer/manage-users-and-security/10.0/use-ldap-as-an-authentication-scheme/configure-ldap-with-splunk-web#cfe47e31_007f_460d_8b3d_8505ffc3f0dd__Configure_LDAP_with_Splunk_Web for more information.

Timeline

1. Oct 1, 2025, 4:07 PM UTCCVE published
2. Oct 1, 2025, 5:22 PM UTCCISA SSVC assessment

   Exploitation: none · Automatable: no · Technical impact: partial

3. Oct 1, 2025, 5:36 PM UTCRecord last updated

Affected versions

• Splunk Splunk Enterprise

  From 10.0 · fixed in 10.0.1; From 9.4 · fixed in 9.4.4; From 9.3 · fixed in 9.3.6; From 9.2 · fixed in 9.2.8

• Splunk Splunk Enterprise Cloud

  From 9.3.2411 · fixed in 9.3.2411.108; From 9.3.2408 · fixed in 9.3.2408.118; From 9.2.2406 · fixed in 9.2.2406.123

References 1