Denial of Service (DoS) through Multiple LDAP Bind Requests in Splunk Enterprise
Key facts
- Attack vector
- Network
- Privileges required
- High
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-400.
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Splunk | Splunk Enterprise | 10.0 to before 10.0.1; 9.4 to before 9.4.4; 9.3 to before 9.3.6; 9.2 to before 9.2.8 | 10.0.1, 9.4.4, 9.3.6, 9.2.8 | Patch available | CNA |
| Splunk | Splunk Enterprise Cloud | 9.3.2411 to before 9.3.2411.108; 9.3.2408 to before 9.3.2408.118; 9.2.2406 to before 9.2.2406.123 | 9.3.2411.108, 9.3.2408.118, 9.2.2406.123 | Patch available | CNA |
- Splunk Enterprise VendorSplunk Affected 10.0 to before 10.0.1; 9.4 to before 9.4.4; 9.3 to before 9.3.6; 9.2 to before 9.2.8 Fixed in 10.0.1, 9.4.4, 9.3.6, 9.2.8 Patch available CNA
- Splunk Enterprise Cloud VendorSplunk Affected 9.3.2411 to before 9.3.2411.108; 9.3.2408 to before 9.3.2408.118; 9.2.2406 to before 9.2.2406.123 Fixed in 9.3.2411.108, 9.3.2408.118, 9.2.2406.123 Patch available CNA
CPE configurations NVD · 3
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:splunk:splunk:*:*:*:*:enterprise:*:*:* | 9.2.0 to before 9.2.8; 9.3.0 to before 9.3.6; 9.4.0 to before 9.4.4 | Vulnerable | Splunk |
| cpe:2.3:a:splunk:splunk:10.0.0:*:*:*:enterprise:*:*:* | 10.0.0 | Vulnerable | Splunk |
| cpe:2.3:a:splunk:splunk_cloud_platform:*:*:*:*:*:*:*:* | 9.2.2406 to before 9.2.2406.123; 9.3.2408 to before 9.3.2408.118; 9.3.2411 to before 9.3.2411.108 | Vulnerable | Splunk |
- cpe:2.3:a:splunk:splunk:*:*:*:*:enterprise:*:*:* Versions 9.2.0 to before 9.2.8; 9.3.0 to before 9.3.6; 9.4.0 to before 9.4.4 Vulnerable ·Splunk
- cpe:2.3:a:splunk:splunk:10.0.0:*:*:*:enterprise:*:*:* Versions 10.0.0 Vulnerable ·Splunk
- cpe:2.3:a:splunk:splunk_cloud_platform:*:*:*:*:*:*:*:* Versions 9.2.2406 to before 9.2.2406.123; 9.3.2408 to before 9.3.2408.118; 9.3.2411 to before 9.3.2411.108 Vulnerable ·Splunk
Remediation
- Fix · CNA Splunk Enterprise (Splunk) Fixed in 10.0.1, 9.4.4, 9.3.6, 9.2.8
- Fix · CNA Splunk Enterprise Cloud (Splunk) Fixed in 9.3.2411.108, 9.3.2408.118, 9.2.2406.123
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Release ·
Splunk Enterprise 10.0.1, 9.2.8 and 2 more versions
2 records Highest priority Priority MEDIUM 1 MEDIUM, 1 LOW
Other records, highest priority first
- TI-2025-14666 Unauthenticated Blind Server Side Request Forgery (SSRF) in Splunk EnterprisePriority MEDIUM 40
Timeline
- 2026-10-02 Threatist record created from CVE-2025-20370
- 2026-10-03 Alias added: GHSA-jf74-vfwj-v8h7
References
More Splunk vulnerabilities
- TI-2026-16444 Unauthenticated Arbitrary File Creation and Truncation in a PostgreSQL Sidecar Service Endpoint in Splunk Enterprise KEVCVSS 3.1CRITICAL 9.8
- TI-2014-00154 The (1) TLS and (2) DTLS implementations in OpenSSL 1.0.1 before 1.0.1g do not properly… KEVCVSS 3.1HIGH 7.5
- TI-2023-24841 Remote code execution (RCE) in Splunk Enterprise through Insecure XML Parsing CVSS 3.1HIGH 8.8
- TI-2023-15979 ‘edit_user’ Capability Privilege Escalation CVSS 3.1HIGH 8.8
- TI-2024-30707 Remote Code Execution (RCE) due to insecure session storage configuration in Splunk Enterprise on Windows CVSS 3.1HIGH 8.8
- TI-2022-21345 Reflected Cross-Site Scripting via the radio template in Splunk Enterprise CVSS 3.1HIGH 8.8
Sources
- CVE-2025-20370 · CVE Program
- CVE-2025-20370 · NVD
- FIRST EPSS
- GHSA-jf74-vfwj-v8h7 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences